260000MSBA Accelerated Repair Program
RK Finn/Ryan Road and Leeds Elementary Schools
Northampton, Massachusetts
Electrical
26 00 00-i
SECTION 26 00 00
ELECTRICAL
(Filed Sub-Bid Required)
PART 1 - GENERAL ......................................................................................................................................1
1.01 GENERAL PROVISIONS .................................................................................................................1
1.02 RELATED DOCUMENTS .................................................................................................................1
1.03 SUMMARY OF WORK .....................................................................................................................2
1.04 DEFINITIONS ...................................................................................................................................2
1.05 ITEMS TO BE FURNISHED ONLY ..................................................................................................3
1.06 ITEMS TO BE WIRED ONLY ...........................................................................................................3
1.07 RELATED WORK .............................................................................................................................3
1.08 CONTRACT COST BREAKDOWN ..................................................................................................3
1.09 INSPECTION OF SITE .....................................................................................................................3
1.10 CONTRACTOR'S REPRESENTATIVE ............................................................................................3
1.11 COOPERATION ...............................................................................................................................3
1.12 CODES, ORDINANCES, AND PERMITS ........................................................................................4
1.13 GUARANTEE ...................................................................................................................................4
1.14 INSPECTIONS AND TESTS ............................................................................................................4
1.15 PHASING, DEMOLITION AND MAINTAINING EXISTING SERVICES ..........................................4
PART 2 - PRODUCTS ...................................................................................................................................5
2.01 GENERAL .........................................................................................................................................5
2.02 RACEWAYS AND FITTINGS ...........................................................................................................6
2.03 WIRING DEVICES ...........................................................................................................................8
2.04 ELECTRICAL POWER EQUIPMENT ..............................................................................................8
2.05 ELECTRICAL SYSTEM CONTROLS AND INSTRUMENTS ........................................................ 10
2.06 GROUNDING SYSTEM ................................................................................................................ 10
2.07 FIRE ALARM AND DETECTION SYSTEM EXTENSION ............................................................. 11
2.08 LIGHTNING PROTECTION SYSTEM .......................................................................................... 13
PART 3 - EXECUTION ............................................................................................................................... 14
3.01 WORK COORDINATION AND JOB OPERATIONS ..................................................................... 14
3.02 PLANS AND SPECIFICATIONS ................................................................................................... 15
3.03 PROTECTION AND CLEANUP .................................................................................................... 15
3.04 SAFETY PRECAUTIONS .............................................................................................................. 15
3.05 WORKMANSHIP AND INSTALLATION METHODS..................................................................... 15
3.06 BRANCH CIRCUITS ..................................................................................................................... 19
3.07 FIREPROOFING AND WATERPROOFING ................................................................................. 19
3.08 CUTTING AND PATCHING .......................................................................................................... 20
3.09 DEMOLITION, REMOVAL AND RELOCATION WORK ............................................................... 20
3.10 STORAGE AND INSTALLATION OF EQUIPMENT ..................................................................... 20
END OF INDEX
MSBA Accelerated Repair Program
RK Finn/Ryan Road and Leeds Elementary Schools
Northampton, Massachusetts
Electrical
26 00 00 - 1
SECTION 26 00 00
ELECTRICAL
(Filed Sub-Bid Required)
PART 1 - GENERAL
1.01 GENERAL PROVISIONS
A. Attention is directed to the CONTRACT AND GENERAL CONDITIONS and all Sections
within DIVISION 01 - GENERAL REQUIREMENTS which are hereby made a part of
this Section of the Specifications.
B. Time, Manner and Requirements for Submitting Sub-Bids:
1. Sub-bids for work under this Section shall be for the complete work and shall be
filed in a sealed envelope with the ________________________ at a time and
place as stipulated in the "NOTICE TO CONTRACTORS".
The following should appear on the upper left hand corner of the envelope:
NAME OF SUB-BIDDER: (Insert name of sub-bidder)
PROJECT: ((Insert project number from top of
page))
SUB-BID FOR SECTION: 26 00 00 – ELECTRICAL
2. Each sub-bid submitted for work under this Section shall be on forms furnished
by the ________________ as required by Section 44F of Chapter 149 of the
General Laws, as amended. Sub-bid forms may be obtained at the office of the
________________, or may be obtained by written or telephone request;
telephone _____________.
3. Sub-bids filed with the _____________________ shall be accompanied by BID
BOND or CASH or CERTIFIED CHECK or TREASURER'S CHECK or
CASHIER'S CHECK issued by a responsible bank or trust company payable to
the ____________________ in the amount of five percent of the sub-bid. A sub-
bid accompanied by any other form of bid deposit than those specified will be
rejected.
C. Sub Sub-Bid Requirements: None
D. Reference Drawings: The Work of this Filed Sub-Bid is shown on the following
Contract Drawings: E1.0 (K Finn/Ryan Road) & E1.0 (Leeds Elementary Schools)
1.02 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
B. Examine all Drawings and all Sections of the Specifications for requirements and
provisions affecting the work of this Section.
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RK Finn/Ryan Road and Leeds Elementary Schools
Northampton, Massachusetts
Electrical
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1.03 SUMMARY OF WORK
A. Work described herein shall be interpreted as work to be done by the Electrical Sub
Contractor. Work to be performed by other trades will be referenced to a particular
contractor.
B. Provide all labor, materials, tools, and equipment, including scaffolding, to complete the
installation of the electrical system. Install, equip, adjust, and put into operation the
respective portions of the installation specified, and so interconnect various items or
sections of work in order to form a complete and operating whole. Systems may be
referenced in singular or plural terms, also refer to drawings to confirm quantities. The
work shall consist of, but shall not necessarily be limited to the following:
1. Disconnection and reconnection of existing rooftop units, exhaust fans, and other
roof-mounted equipment.
2. Fire alarm system extension.
3. Lighting Protection System.
4. All raceway systems, including boxes, couplings, and fittings.
5. All branch circuit wiring systems, including wiring devices, and plates.
6. Connections for all building equipment, including mechanical, plumbing, and the
like.
7. All testing of equipment installed.
8. Any other item of work hereinafter specified or indicated on electrical drawings.
9. Drilling, coring, cutting and patching of holes (where the largest dimension
thereof does not exceed 12 inches) for electrical conduit systems, and
equipment. Cutting and patching shall be in accordance with Division 1, Section
“Cutting and Patching”.
10. Systems Identification.
11. Scaffolding, Rigging, and Staging required for all Electrical Work.
12. Provide Vibration Control and Seismic Restraints for all Electrical Systems
conforming to the requirements of Massachusetts State Code.
13. Phasing and demolition.
14. Sealing of all penetrations through walls, slabs, partitions, which are not fire
rated.
1.04 DEFINITIONS
A. Most terms used within the documents are industry standard. Certain words or phrases
shall be understood to have specific meanings as follows:
1. Provide: Furnish and install completely connected up and in operable condition.
2. Furnish: Purchase and deliver to a specific location within the building or site.
3. Install: With respect to equipment furnished by others, install means to receive,
unpack, move into position, mount and connect, including removal of packaging
materials.
4. Conduit: Raceways of the metallic type which are not flexible. Specific types as
specified.
5. Connect: To wire up, including all branch circuitry, control and disconnection
devices so item is complete and ready for operation.
6. Subject to Mechanical Damage: Equipment and raceways installed exposed and
less than eight feet above finished floor in mechanical rooms or other areas
where heavy equipment may be in use or moved.
7. Finish Space: Any space where public/students have access including but not
limited to corridors, classrooms, offices, toilets, cafeteria, gym, auditorium, etc.
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RK Finn/Ryan Road and Leeds Elementary Schools
Northampton, Massachusetts
Electrical
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1.05 ITEMS TO BE FURNISHED ONLY
A. Furnish the following items for installation under designated sections.
1. None.
1.06 ITEMS TO BE WIRED ONLY
A. Install the following items furnished under designated sections.
1. None.
1.07 RELATED WORK
A. The following related work is to be performed under designated sections.
1. Temp. Controls – SECTION 01 50 00 – CONSTRUCTION FACILITIES AND
TEMPORARY CONTROLS.
2. Payment for energy for temporary light and power shall be made by the Owner.
3. Automatic Temperature Controls: SECTION 23 00 00 – HVAC
1.08 CONTRACT COST BREAKDOWN
A. Submit a breakdown of contract price to aid Architect in determining value of work
installed as job progresses.
1.09 INSPECTION OF SITE
A. Electrical bidders will be permitted to inspect site. Failure to inspect existing conditions
or to fully understand work which is required shall not excuse Electrical Subcontractor
from his obligations to supply and install work in accordance with specifications and the
drawings and under all site conditions as they exist.
1.10 CONTRACTOR'S REPRESENTATIVE
A. Retain a competent representative on the project.
1.11 COOPERATION
A. Work shall be carried on under usual construction conditions, in conjunction with other
contractors work. Cooperate with other contractors, coordinate work and proceed in a
manner as not to delay progress.
B. Before proceeding, examine all construction drawings and consult other contractors to
coordinate installation and avoid interference.
C. In case of dispute, the Architect will render a decision in accordance with General and
Supplementary General Conditions.
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RK Finn/Ryan Road and Leeds Elementary Schools
Northampton, Massachusetts
Electrical
26 00 00 - 4
1.12 CODES, ORDINANCES, AND PERMITS
A. Codes and Ordinances:
1. All material and work provided shall be in accordance with all applicable codes
including the following codes and standards as most recently amended.
Commonwealth of Massachusetts Building Code
Massachusetts Electric Code, 2014 Edition
State Department of Public Safety
NFPA 101 "Life Safety Code"
NFPA Standards
Standards of the Underwriters Laboratories (UL)
Occupational Safety and Health Act (OSHA)
Americans with Disabilities Act (ADA)
Energy Conservation Code
City of Northampton
2. Where contract documents indicate more stringent requirements than codes, the
contract documents shall take precedence.
B. Permits: Be responsible for filing documents, and securing of inspection and approvals.
Pay permit fees. Refer to INSTRUCTIONS TO BIDDERS.
1.13 GUARANTEE
A. Keep work in repair without expense to Owner as far as concerns defects in
workmanship or materials for a period of not less than one year from date of substantial
completion.
1.14 INSPECTIONS AND TESTS
A. Inspection: If inspection of materials installed shows defects, such defective work,
materials, and/or equipment shall be replaced and inspection and tests repeated.
B. Tests: Make reasonable tests and prove integrity of work and leave electrical
installation in correct adjustment and ready to operate. All panels shall have phases
balanced as near as practical. A consistent phase orientation shall be adhered to at all
terminations.
1.15 PHASING, DEMOLITION AND MAINTAINING EXISTING SERVICES
A. During the execution of the work, required relocation, rerouting, etc., of existing
equipment and systems in the existing building areas where new work is to be installed
or new connections are scheduled to be made, shall be performed by the Electrical
Contractor, as required by job conditions and as determined by the Architect in the field,
to facilitate the installation of the new system, while demolition, relocation work or new
tie-ins will be performed. Outages required for construction purposes shall be
scheduled for the shortest practical periods of time, in coordination with the Owner’s
designated representative, for specified, mutually agreeable periods of time, after each
of which the interruption shall cease and the service shall be restored. This procedure
shall be repeated to suit the Owner’s working schedule, as many times as required until
all work is complete. Any outages of service shall be approved by the Owner, prior to
commencing the work. No outages or shutdowns of service shall occur without the
written authorization of the Owner prior to commencing the work. Give notice of any
MSBA Accelerated Repair Program
RK Finn/Ryan Road and Leeds Elementary Schools
Northampton, Massachusetts
Electrical
26 00 00 - 5
scheduled shutdowns, a minimum of (2) weeks in advance. Owner shall make their
best effort to meet this request without adversely affecting the electric service to the
existing building.
B. Prior to any deactivation and relocation or demolition work, consult the drawings and
arrange a conference with the Owner’s representative in the field to inspect each of the
items to be deactivated, removed or relocated. Care shall be taken to protect all
equipment designated to be relocated and reused or to remain in operation and be
integrated with the new systems.
C. Where existing outlets are to be reused and are cut off by the remodeling, they shall be
reconnected to existing circuits as required by field conditions. Each bidder shall,
before submitting his bid, visit the site and make a thorough examination of the
conditions in the existing building in order to determine the extent of the work to be
done.
D. All deactivation, relocation and temporary tie-ins of electrical systems and equipment
shall be provided by the Electrical Subcontractor. All demolition and removal of
electrical systems and equipment designated to be demolished shall be by the
Electrical Subcontractor.
E. The Owner reserves the right to inspect the material scheduled for removal and salvage
any items he deems usable as spare parts.
F. Phasing
1. The Electrical Subcontractor shall construct the subject in phases as directed by
the Architect to suit the project progress schedule, as well as the completion date
of the project.
PART 2 - PRODUCTS
2.01 GENERAL
A. Product specifications are written in such a manner so as to specify what materials may
be used in a particular location or application and therefore do not indicate what is not
acceptable or suitable for a particular location or application. As an example:
non-metallic sheathed cable is not specified; therefore, it is not acceptable.
B. For purpose of establishing a standard of quality and not for purpose of limiting
competition, the basis of this Specification is upon specified models and types of
equipment and materials, as manufactured by specified manufacturers.
C. In all cases, standard cataloged materials and systems have been selected. Materials
such as lighting fixtures specially manufactured for this particular project and not part of
a manufacturers' standard product line will not be acceptable. In the case of systems,
the system components shall be from a single source regularly engaged in supplying
such systems. A proposed system made up of a collection of various manufacturers'
products will be unacceptable.
MSBA Accelerated Repair Program
RK Finn/Ryan Road and Leeds Elementary Schools
Northampton, Massachusetts
Electrical
26 00 00 - 6
D. Where Specifications list manufacturers' names and/or "as approved" or "equal
approved by Architect", other manufacturers' equipment will be considered if equipment
meets Specification requirements and has all features of the specified items as are
considered essential by Architect.
E. All material shall be new and shall be UL listed.
2.02 RACEWAYS AND FITTINGS
A. Raceways - General:
1. No raceway shall be used smaller than 3/4" diameter and shall have no more
than four (4) 90o bends in any one run, and where necessary, pull boxes shall be
provided. Only rigid metal conduit or intermediate metal conduit is allowed for
slab work. Cable systems, if allowed to be used by other sections of this
specification, shall not be used exposed or in slabs, whether listed by "UL" for
such use or not.
2. Rigid metal conduit conforming to, and installed in accordance with, Article 344
shall be heavy wall zinc coated steel conforming to American Standard
Specification C80-1 and may be used for service work, exterior work, slab work,
and below grade level slab, wet locations, and in penthouse for drops down to
equipment from elevations below eight feet and also where raceway may be
subject to mechanical damage.
3. Intermediate metal conduit conforming to, and installed in accordance with,
Article 342, may be used for all applications where rigid metal conduit is allowed
by these specifications.
4. Electrical Metallic Tubing (EMT), conforming to, and installed in accordance with,
Article 358 shall be zinc coated steel, conforming to industry standards, may be
used in masonry block walls, stud partitions, above furred ceilings, where
exposed but not subject to mechanical damage in unfinished spaces, and may
be used for fire alarm work where concealed or exposed in unfinished spaces.
5. Flexible metal conduit shall be used for final connections to recessed lighting
fixtures from above ceiling junction boxes and for final flexible connections to
motors and other rotating or vibrating equipment. Liquid tight flexible metal
conduit shall be used for the above connections which are located in moist
locations. Moist locations shall include mechanical rooms, penthouses and
exterior locations with mechanical equipment. All flexible connections shall
include an insulated grounding conductor.
6. Acceptable manufacturers:
Pittsburgh Standard Conduit Company
Republic Steel and Tube
Youngstown Sheet and Tube Company
Carlon
Or equal.
7. Fittings:
a. Provide insulated bushings on all raceways 1 inch diameter or larger.
b. Manufacturer's standard fittings shall be used for raceway supports.
c. Expansion Fittings: Expansion fittings shall be used where structural and
concrete expansion joints occur and shall include a ground strap.
d. Couplings for rigid metal and intermediate metal conduit shall be threaded
type.
e. Threadless fittings for EMT shall be watertight compression type or
set-screw type (dry-locations). All fittings shall be concrete tight. No
diecast fittings allowed except for raceways larger than 1 inch diameter.
MSBA Accelerated Repair Program
RK Finn/Ryan Road and Leeds Elementary Schools
Northampton, Massachusetts
Electrical
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f. Cable supports in vertical raceways shall be of the split wedge type.
Armored cable supports for vertical runs to be of wire mesh basket design.
g. Wall entrance seals shall be equal to O.Z. Gedney type "WSK".
h. Couplings, elbows and other fittings used with rigid nonmetallic conduit
shall be of the solvent cemented type to secure a waterproof installation.
i. Acceptable manufacturers:
O.Z.
Crouse Hinds
Appleton
EFCOR
Steel City
Or equal
B. Outlets, Pull and Junction Boxes:
1. Outlets:
a. Each outlet in wiring or raceway systems shall be provided with an outlet
box to suit conditions encountered. Boxes installed in normally wet
locations or surface mounted shall be of the cast-metal type having hubs.
Concealed boxes shall be cadmium plated or zinc coated sheet metal
type. Old work boxes with Madison clamps not allowed in new
construction.
b. Each box shall have sufficient volume to accommodate number of
conductors in accordance with requirements of Code. Boxes shall not be
less than 1-1/2" deep unless shallower boxes are required by structural
conditions and are specifically approved by Architect. Ceiling and bracket
outlet boxes shall not be less than 4" octagonal except that smaller boxes
may be used where required by particular fixture to be installed. Flush or
recessed fixtures shall be provided with separate junction boxes when
required by fixture terminal temperature requirements. Switch and
receptacle boxes shall be 4" square or of comparable volume.
c. Far side box supports shall be Caddy J-1A.
d. Acceptable manufacturers:
Appleton
Crouse Hinds
Steel City
RACO
Or equal
2. Pull and Junction Boxes: Where indicated on plans, and where necessary to
terminate, tap off, or redirect multiple raceway runs or to facilitate conductor
installation, furnish, and install appropriately designed boxes. Boxes shall be
fabricated from code gauge steel assembled with corrosion resistant machine
screws. Box size shall be as required by Code.
Boxes in moist or wet areas shall be galvanized type. Boxes larger than 4-11/16
inches square shall have hinged covers. Boxes larger than 12 inches in one
dimension will be allowed to have screw fastened covers, if a hinged cover would
not be capable of being opened a full 90 degrees due to installation location.
a. Acceptable Manufacturers:
Brasch
Hoffman
Keystone
Lee Products Co.
McKinstry Inc.
MSBA Accelerated Repair Program
RK Finn/Ryan Road and Leeds Elementary Schools
Northampton, Massachusetts
Electrical
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Eldon Inc.
Or equal
2.03 WIRING DEVICES
A. Receptacles: Receptacles shall be flush mounted. All standard 20 ampere devices to
be of same manufacturer.
Acceptable Manufacturers:
Twenty (20) ampere duplex grounding type NEMA 5-20R,
Cooper 5362-V,
Hubbell 5362I,
Pass and Seymour 5362I,
Leviton 5362-I
Or equal
Thirty (30) ampere, 250 volt NEMA 14-30R complete with plate,
Cooper 1257,
Hubbell 9430-A,
Pass and Seymour 3864
Or equal
B. Switches: 20 ampere,
Cooper CWD-2221,
Hubbell 1221,
Pass and Seymour 20AC-2,
Leviton 1221.
Or equal
Prewired devices with pigtails acceptable
C. Composition material of wiring devices to be nylon with ivory finish. Outlets on
computer circuits shall be gray.
D. Cover plates: Brushed US 302 stainless steel
Provide gaskets on all wiring device plates where devices are on walls separating
conditioned and non-conditioned spaces.
E. Exterior Outlets with Lockable Covers and outlets within 6’ of water.
1. Provide exterior outlets with lockable covers at all exterior outlet locations.
Provide Hubbell Cat #5752-0 weatherproof locking covers. Provide ground fault
interrupter type receptacles within 6’ of water and as indicated on drawings.
2.04 ELECTRICAL POWER EQUIPMENT
A. Motor Controls - Manual and Magnetic:
1. Individually-mounted magnetic starters shall be NEMA rated across-the-line type
with thermal overload on each phase, single-speed, two-speed, or reduced
voltage start as indicated.
2. Motor Starters shall be furnished by Electrical Sub-Contractor unless part of
package mechanical equipment such as rooftop units.
MSBA Accelerated Repair Program
RK Finn/Ryan Road and Leeds Elementary Schools
Northampton, Massachusetts
Electrical
26 00 00 - 9
3. Starters shall be of maintained contact type, of size and type required for
particular motor horsepower and voltage. Minimum size starter to be size 1
FVNR, unless noted otherwise.
a. Starters shall have OL reset button, green push-to-test type pilot light to
indicate "ON", and "HAND-OFF-AUTO" switch in cover.
b. Starters to have 120 volt control transformers with fused output being
provided for those units operating on 277/480 volt system.
c. Provide Class 20 fixed heater overloads with auto/manual reset.
d. Provide four (4) sets of auxiliary contacts of convertible type N.O. to N.C.
for each starter.
e. Motor starters shall have NEMA I enclosures. Those in wet locations shall
be NEMA 3R.
f. Acceptable Manufacturers:
Westinghouse/Culter-Hammer
Square D/Groupe Schneider
Siemens
Allen Bradley
GE
Or equal.
4. Manual motor starters shall have pilot lights and shall be furnished with thermal
overloads on each phase.
B. Motors: Each motor shall have disconnect switch and starter provided under this
section. Starters which are a part of "factory assembled" control panel will be provided
under section supplying equipment to be controlled but connected under this section.
1. Provide motor terminal boxes for each motor not furnished with same.
C. Disconnect Switches:
1. Disconnect (safety) switches shall conform to industrial standards of NEMA, be
UL listed and shall be heavy duty type, quick-make, quick-break type with
interlocking cover mechanism and provisions for padlocking switch handle in
"OFF" position. Three pole toggle switches are not acceptable as substitute for
disconnect switches.
2. Disconnect switches shall be of fused or unfused type as indicated with number
of disconnecting poles indicated. The grounded conductor shall not be switched.
Switches for use with current limiting fuses shall be rejection type and those used
in conjunction with motors shall be horsepower rated. Provide oversize
termination lugs if required by conductor size.
3. Enclosures shall be of proper NEMA type for intended location and shall be
phosphate coated or equivalent code gauge galvanized sheet steel with ANSI
#24 dark gray baked enamel finish.
4. Acceptable Manufacturers:
Westinghouse/Culter-Hammer
Square D/Groupe Schneider
Siemens
Allen Bradley
Or equal.
MSBA Accelerated Repair Program
RK Finn/Ryan Road and Leeds Elementary Schools
Northampton, Massachusetts
Electrical
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D. Fuses:
1. Provide a complete set of fuses for each item of fusible type equipment. Fusible
equipment furnished by other contractors will be complete with fuses, unless
noted otherwise on Electrical Drawings.
2. Turn over to authorized representative of Owner upon completion a spare set of
fuses of each different type and ampere rating installed. These spares shall be
bound with twine and tagged.
3. Secondary system fuses, rated at 600 volts or less, shall be UL listed and
constructed in conformance with the applicable standards set forth by NEMA and
ANSI. All fuses of a particular class shall be of same manufacturer.
4. All fuses in distribution panelboards and switchboards shall be class "L" above
600 amperes and class "RK1" for 600 amperes and below.
5. Acceptable Manufacturers:
Bussmann, Division of McGraw
Gould/Shawmut
GEC-ALSTHOM
Or equal
2.05 ELECTRICAL SYSTEM CONTROLS AND INSTRUMENTS
A. Provide a complete power system consisting of branch circuits, motor disconnect
switches, pushbutton stations, motor starters, and other devices to connect up and
leave in operating condition each piece of electrically operated equipment provided
either under this section or other Divisions.
B. All control wiring, not indicated in the Electrical Specifications or not shown on Electrical
Drawings, will be provided by Temperature Control Subcontractor.
2.06 GROUNDING SYSTEM
A. All equipment and systems shall be grounded.
B. The grounded conductor shall be supplemented by an equipment grounding system.
C. The equipment grounding system shall be installed so all conductive items in close
proximity to electrical circuits operate continuously at ground potential and provide a
low impedance path for ground fault currents.
D. Grounding conductors shall be so installed as to permit shortest and most direct path to
ground.
E. Equipment grounding conductors and straps shall be sized in compliance with Code
Table 250.
F. Grounding conductors shall be insulated with green color. Grounding conductors for
use on isolated ground receptacles shall be green with trace color to differentiate
between normal ground conductors.
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RK Finn/Ryan Road and Leeds Elementary Schools
Northampton, Massachusetts
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26 00 00 - 11
G. Branch circuits shall consist of phase, grounded and grounding conductor installed in
common metallic raceway. The raceway system may not serve as the grounding
conductor only. All circuits shall have a separate insulated grounding conductor
installed. Any flexible cable system or non-metallic raceway system shall have an
insulated grounding conductor. Any cable system for use on isolated ground circuits
shall have both an isolated ground conductor as well as an equipment ground
conductor, both of which shall be insulated.
H. Each electrical expansion fitting shall be furnished with a bonding jumper. Provide
grounding bushings and ground connections for all raceways terminating below
equipment where there is no metal-to-metal continuity.
I. Continuity between all metallic and non-metallic raceway systems and equipment shall
be maintained.
J. Outdoor lighting fixtures shall be grounded and bonded in common with building system
via a separate grounding conductor.
2.07 FIRE ALARM AND DETECTION SYSTEM EXTENSION
A. Scope:
1. Provide extension of existing fire alarm system as indicated on drawings and
required by manufacturer including testing.
2. Conduit and Wire:
a. Conduit:
b. Conduit shall be in accordance with the National Electrical Code (NEC),
local and state requirements.
c. Where exposed, all wiring shall be installed in conduit or raceway. Conduit
fill shall not exceed 40 percent of interior cross sectional area where three
or more cables are contained within a single conduit.
d. Cable must be separated from any open conductors of power, or Class 1
circuits, and shall not be placed in any conduit, junction box or raceway
containing these conductors, per NEC Article 760-29.
e. Wiring for 24 volt control, alarm notification, emergency communication
and similar power-limited auxiliary functions may be run in the same
conduit as initiating and signaling line circuits. All circuits shall be provided
with transient suppression devices and the system shall be designed to
permit simultaneous operation of all circuits without interference or loss of
signals.
f. Conduit shall not enter any FACP, or any other remotely mounted control
panel equipment or backboxes, except where conduit entry is specified by
the FACP manufacturer.
g. Conduit shall be 3/4 inch (19.1 mm) minimum.
h. MC Fire Alarm Control Cable with red armor may be used for fire alarm
where concealed and allowed by code.
3. Wire:
a. All fire alarm system wiring must be new, unless specified herein.
b. Wiring shall be in accordance with local, state and national codes (e.g.,
NEC Article 760) and as recommended by the manufacturer of the fire
alarm system. Number and size of conductors shall be as recommended
by the fire alarm system manufacturer, but not less than 16 AWG (1.02
mm) for initiating device circuits and signaling line circuits, and 14 AWG
(1.32 mm) for notification appliance circuits.
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c. All wire and cable shall be listed and/or approved by a recognized testing
agency for use with a protective signaling system.
d. Wiring used for the SLC multiplex communication loop shall be twisted and
shielded unless specifically accepted by the fire alarm equipment
manufacturer.
e. All field wiring shall be completely supervised.
f. Initiating circuits shall be arranged to serve like categories (manual,
smoke, waterflow). Mixed category circuitry shall not be permitted except
on signaling line circuits connected to intelligent reporting devices.
4. Programming of Existing System:
a. Existing service provider shall be contracted to program all new and
existing devices on fire alarm network.
5. Field Quality Control
a. Manufacturer's Field Services: Provide services of a factory-authorized
service representative to supervise the field assembly and connection of
components and the pretesting, testing, and adjustment of the system.
b. Service personnel shall be qualified and experienced in the inspection,
testing, and maintenance of fire alarm systems. Examples of qualified
personnel shall be permitted to include, but shall not be limited to,
individuals with the following qualifications:
1) Factory trained and certified.
2) National Institute for Certification in Engineering Technologies
(NICET) fire alarm certified.
3) International Municipal Signal Association (IMSA) fire alarm
certified.
4) Certified by a state or local authority.
5) Trained and qualified personnel employed by an organization listed
by a national testing laboratory for the servicing of fire alarm
systems.
c. Pretesting: Determine, through pretesting, the conformance of the system
to the requirements of the Drawings and Specifications. Correct
deficiencies observed in pretesting. Replace malfunctioning or damaged
items with new and retest until satisfactory performance and conditions are
achieved.
d. Final Test Notice: Provide a 10-day minimum notice in writing when the
system is ready for final acceptance testing.
e. Minimum System Tests: Test the system according to the procedures
outlined in NFPA 72.
f. Retesting: Correct deficiencies indicated by tests and completely retest
work affected by such deficiencies. Verify by the system test that the total
system meets the Specifications and complies with applicable standards.
g. Report of Tests and Inspections: Provide a written record of inspections,
tests, and detailed test results in the form of a test log.
h. Final Test, Certificate of Completion, and Certificate of Occupancy:
1) Test the entire system as required by the Authority Having
Jurisdiction in order to obtain a certificate of occupancy. Test
system as many times as required to complete project in phases
and required by Fire Department.
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Northampton, Massachusetts
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2.08 LIGHTNING PROTECTION SYSTEM
A. General:
1. Provide all labor, material, equipment, and services required for the complete
lightning protection system in accordance with NFPA 780, UL96A and applicable
contract drawings for the Building. System shall receive UL Master Label. This
section is responsible for providing a design for an approved “UL Master Label
System” in accordance with the drawings and specifications.
B. The following items of work are specifically included in, but not necessarily limited to the
work of this section without limiting the generality implied by the Specifications.
1. Air terminals.
2. Copper cable roof contactors.
3. Down conductor.
4. Ground grid installation.
5. PVC sleeves through foundation walls to below grade.
C. Manufacturer shall provide seven complete sets of shop drawings for review, showing
location of air terminals, conductors, installation procedures and details, and detailed
manufacturer’s data sheets on all components, accessories, and miscellaneous
equipment to be used in this installation.
D. Description of System:
1. The contractor shall provide a complete installation of equipment to comprise a
system for protection against damage by lightning.
2. The system, including air terminals, conductors, and complementary parts, shall
be installed so that completed work is unobtrusive and does not detract from the
building appearance.
3. The work shall comply with all applicable federal, state, municipal laws,
ordinances, and regulations.
E. Standards of Quality:
1. All materials shall be the product of a manufacturer regularly engaged in the
production of lightning protection equipment.
2. All material shall be manufactured by Thompson Lightning Protection, Harger,
East Coast Lightning Equipment, Heary Bros. or equal.
F. Service, Testing and Guarantee:
1. Installation of equipment shall be done under direct supervision of the equipment
manufacturer’s factory representative. A master labeled system is to be
provided.
2. The completed lightning protection systems hall be fully tested in the presence of
the Architect to demonstrate continuity of all conductors. A written test report
shall be submitted.
3. The ground grid resistance shall be measured and a written statement submitted
to the architect. Grid resistance shall be 5 ohms or less.
G. Products:
1. Air Terminals:
a. Complete assembly consisting of chrome plated air terminal with
attachment mechanisms.
2. Conductors:
a. Copper conductors shall be 28 strands of #13 gauge, net weight 420
pounds per 1000 ft., minimum.
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3. Ground Rods:
a. Ground rods shall be copperweld, 3/4 in. minimum diameter, 10 feet
minimum length.
4. Connectors, Fitting, Fasteners and Hardware:
a. Provide all connectors, fittings, fasteners, hardware, clamps, guards, lugs,
etc., as required to connect, interconnect and install all parts of the
system.
b. All shall be fabricated from copper metal and be approved for use
intended.
c. All connections between dissimilar metals shall have connectors approved
for this type of application.
H. Installation:
1. Installation shall be accomplished in a professional manner by qualified
personnel regularly engaged in and experienced in this type of work.
2. All work installed within the building shall be concealed.
3. All work installed in accessible locations shall be properly guarded and protected.
4. All material shall be installed in a manner to prevent electrolyic action under the
presence of moisture.
5. All roofs, walls or other building penetrations shall be made in a manner to
prevent the ingress of water or moisture. Roof penetrations hall be furnished and
installed by Roofing Contractor.
6. PVC sleeves shall be provided where conductors pass through all floors.
7. Installation shall be accomplished in a manner to eliminate possibility of
displacement and subsequent maintenance.
8. All connections shall be mechanically and electrically sound and all bonding
surfaces. All excavating, backfilling and tamping earthwork as required shall be
by General Contractor.
9. Install down conductors concealed within wall.
10. Cables on float roof areas may be run exposed. Adhesive type fasteners shall
be spaced at 3 ft. – 0 in. maximum. Adhesive used shall be compatible with
roofing materials. Coordinate with approved shop drawings.
11. Ground rods shall be driven to full depth in soil undisturbed by building
excavation and are not to be driven into excavation backfill area.
12. Provide connection between grid and water service.
13. Provide grid resistance of 5 ohms maximum.
14. Top of ground rods shall be installed at least 2 ft. – 0 in.below finished grade.
15. All attachments to roof, mechanical or adhesives shall be furnished by Electrical
Sub-contractor but installed by the Roofing Contractor.
I. Master Label:
1. Submit factory certified tests.
2. Submit guarantee for installation and range of lightning protection.
PART 3 - EXECUTION
3.01 WORK COORDINATION AND JOB OPERATIONS
A. Equipment shall not be installed in congested and possible problem areas without first
coordinating installation of same with other trades. Relocate electrical equipment
installed in congested or problem areas should it interfere with the proper installation of
equipment to be installed by other trades.
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Northampton, Massachusetts
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B. Furnish to General Contractor and other Subcontractors information relative to portions
of electrical installation that will affect other trades sufficiently in advance so that they
may plan their work and installation.
C. Obtain from other trades information relative to electrical work which he, the Electrical
Subcontractor, is to execute in conjunction with installation of other trades' equipment.
3.02 PLANS AND SPECIFICATIONS
A. Plans:
1. Drawings showing layout of electrical systems indicate approximate location of
raceways, outlets, and apparatus. Runs of feeders and branch circuits are
schematic and are not intended to show exact routing. Final determination as to
routing shall be governed by structural conditions and as indicated on the
approved coordination Drawings.
B. Specifications:
1. Specifications supplement Drawings and provide specifics pertaining to methods
and material to be used.
3.03 PROTECTION AND CLEANUP
A. Protection:
1. Materials and equipment shall be suitably stored and protected from weather.
2. During progress of work, pipe and equipment openings shall be temporarily
closed so as to prevent obstruction and damage.
3. Be responsible for maintenance and protection of material and equipment until
final acceptance.
B. Cleanup:
1. Keep job site free from accumulation of waste material and rubbish. Remove all
rubbish, construction equipment, and surplus materials from site and leave
premises in a clean condition.
2. At completion, equipment with factory finished surfaces shall be cleaned and
damaged spots touched up with the same type paint applied at factory.
3. Particular attention is called to Section 110-12(c) of the NEC, which requires that
internal parts of electrical equipment not be contaminated by construction
operations.
3.04 SAFETY PRECAUTIONS
A. Provide proper guards, signage, and other necessary construction required for
prevention of accidents and to insure safety of life and property. Remove any
temporary safety precautions at completion.
3.05 WORKMANSHIP AND INSTALLATION METHODS
A. Work shall be installed in first-class manner consistent with best current trade practices.
Equipment shall be securely installed plumb and/or level. No electrical equipment shall
be supported by work of other trades.
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B. Supports:
1. Support work in accordance with best industry practice and by use of standard
fittings.
2. Provide supporting frames or racks for equipment, intended for vertical surface
mounting in free standing position where no walls exist.
3. Supporting frames or racks shall be of standard angle, standard channel or
specialty support system steel members, rigidly bolted or welded together and
adequately braced to form a substantial structure. Racks shall be of ample size
to assure a workmanlike arrangement of equipment.
4. No work for exposed installations in damp locations shall be mounted directly on
any building surface. In such locations, flat bar members or spacers shall be
used to create a minimum of 1/4" air space between building surfaces and work.
5. Nothing (including outlet, pull and junction boxes and fittings) shall depend on
electric raceways or cables for support. All outlet, pull, and junction boxes shall
be independently supported.
6. Nothing shall rest on, or depend for support on, suspended ceiling or its
mounting members.
7. Support surface or pendant mounted lighting fixtures:
a. From outlet box by means of an interposed metal strap, where weight is
less than five pounds.
b. From outlet box by means of a hickey or other direct threaded connection,
where weight is from five to fifty pounds.
c. Directly from structural slab, deck or framing member, where weight
exceeds fifty pounds.
8. Where support members must of necessity penetrate air ducts, provide airtight
sealing provisions which allow for a relative movement between the support
members and the duct walls.
9. Provide channel sills or skids for leveling and support of all floor mounted
electrical equipment.
10. Where permitted loading is exceeded by direct application of electrical equipment
to a slab or deck, provide proper dunnage as required to distribute the weight in a
safe manner.
11. Support metallic raceways by either running within steel frame or hung from the
building frame. Anything hung from building frame shall be attached with metallic
fasteners.
C. Fastenings:
1. Fasten electric work to building structure in accordance with the best industry
practice.
2. Where weight applied to attachment points is 100 pounds or less, fasten to
building elements of:
a. Wood -- with wood screws.
b. Concrete and solid masonry -- with bolts and expansion shields.
c. Hollow construction -- with toggle bolts.
d. Solid metal -- with machine screws in tapped holes or with welded studs.
3. Where weight applied to attachment points exceeds 100 pounds, fasten as
follows:
a. At field poured concrete slabs, provide inserts with 18" minimum length
slip-through steel rods, set transverse to reinforcing steel.
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Northampton, Massachusetts
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b. Where building is steel framed, utilize suitable auxiliary channel or angle
iron bridging between structural steel elements to establish fastening
points. Bridging members shall be suitably welded or clamped to building
steel. Provide threaded rods or bolts to attach to bridging members.
4. Floor mounted equipment shall not be held in place solely by its own dead
weight. Provide floor anchor fastenings. Floor mounted equipment over 72
inches in height shall also be braced to nearest wall or overhead structural
elements.
5. For items which are shown as being mounted at locations where fastenings to
the building construction element above is not possible, provide suitable auxiliary
channel or angle iron bridging to building structural elements.
6. Fastenings for metallic raceways using the fastening as support shall be of the
metallic type. Fastenings to hold raceways or cables in place may be via tyraps.
D. General Raceway Installation:
1. Install the various types of raceways in permitted locations as previously
specified. All raceways shall be run concealed. Consult Architect for instruction
for raceways which must be exposed in public spaces.
2. Raceways for normal-emergency or emergency only wiring cannot contain other
conductors.
3. Raceways shall be properly aligned, grouped, and supported in accordance with
code. Exposed raceways shall be installed at right angles to or parallel with
structural members. Concealed raceways may take most direct route between
outlets.
4. Raceways run on trapeze hangers shall be secured to the trapeze.
5. Raceways shall be continuous and shall enter and be secured to all boxes in
such a manner that each system shall be electrically continuous from service to
all outlets. Provide grounding bushings and bonding jumpers where raceways
attach to painted enclosures or terminate below equipment.
6. Where raceways enter boxes, cabinets, tap boxes, other than those having
threaded hubs, a standard locknut shall be used on the outside and locknut and
bushing on the inside.
7. Where raceways terminate below equipment and there is no direct metal to metal
continuity, provide grounding bushings on raceways and interconnect with
equipment grounding conductor.
8. All empty raceways shall be provided with a pull wire.
9. All raceway sleeves, stub-ups, or stub-outs, where not connected to a box or
cabinet, shall be terminated with a bushing.
10. All raceway joints shall be made up tight and no running threads will be
permitted.
11. Where raceways are cut, the inside edge shall be reamed smooth to prevent
injury to conductors.
12. All vertical raceways passing through floor slabs shall be supported.
13. Raceways shall not be installed in concrete slabs above grade or below
waterproofed slabs.
14. Electric raceways and/or sleeves passing through floors or walls shall be of such
size and in such location as not to impair strength of construction. Where
raceways alter structural strength or the installation is questionable, the structural
engineer shall be contacted for approval.
15. Raceways shall not run directly above or below heat producing apparatus such
as boilers, nor shall raceways run parallel within 6 inches of heated pipes.
Raceways crossing heated pipes shall maintain at least a 1 inch space from
them.
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Northampton, Massachusetts
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16. Raceways shall be installed in such a manner as to prevent collection of trapped
condensates, and all runs shall be arranged to drain.
17. Raceways passing between refrigerated and non-refrigerated spaces and those
penetrating enclosures with air movement shall be provided with seals.
18. Raceways feeding fire and jockey pumps shall be rigid metal conduit either run
below slab or inside 2 hour rated enclosure. Final connections to motors shall be
liquidtite flexible conduit.
19. Where two alternate wiring methods interconnect such as EMT to flexible metal
conduit, an outlet box shall be provided.
20. All empty raceways entering building and all sleeves or core drilled openings
through floors shall be sealed.
21. Rigid non-metallic raceways where allowed and run as a ductbank encased in
concrete shall be installed with platic spacers to ensure a separation of 3 inches
between raceways,Elbows and extensions of rigid non-metallic raceway systems
which penetrate slabs shall be rigid or intermediate metal conduit.
22. Raceways used for transformer connections shall be flexible type and shall
contain a grounding conductor.
23. Raceways entering building through foundation wall into a basement area shall
be provided with wall entrance seals or with other acceptable waterproofing
method.
E. General Outlet Box Installation:
1. Boxes shall be set flush with finish surface and provided with proper type
extension rings or plaster covers. Thru the wall boxes are not permitted. Check
device or fixture to be mounted to box to ensure box orientation is proper.
2. In addition to boxes shown, install additional boxes where needed to prevent
damage to cables and wires during pulling-in operation.
3. Remove knockouts only as required and plug unused openings.
4. Where required for horizontal and vertical alignment of boxes in stud partitions,
bar hangers spanning two studs shall be used. Device boxes for insertion type
receptacles shall be provided with far side box supports where there are less
than two entering nonflexible raceways, and where bar rangers are not provided.
5. Boxes flush mounted in fire rated partitions and on opposite sides of the partition
shall be separated by a distance of 24 inches in accordance with UL listing for
the box.
6. Locations of outlets indicated on Drawings are approximate. For items exposed
to view, refer to architectural Drawings and coordinate locations with masonry
joints, panel joints, ceiling grids, structural members, etc.
7. In case of conflict with standard mounting heights and device alignment, consult
Architect prior to roughing.
8. Check all door swings on architectural Drawings to ensure lighting switches are
installed on strike side of door.
9. The right to make any reasonable change in location of outlets prior to roughing
is reserved by Architect. "Reasonable change" shall be interpreted as movement
within 10 feet of location shown.
10. Obtain dimensioned plan from Architect for floor outlets.
11. Outlet boxes for use where surface metal raceways are allowed shall be of a type
specifically designed to be used with such surface metal raceway systems.
12. Outlet boxes shall not line up back to back in partition walls.
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Northampton, Massachusetts
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F. Conductor Installation:
1. No conductors shall be pulled into individual raceways until such raceway system
is complete and free of debris. No harmful lubricants shall be used to ease
pulling.
2. All conductors shall be wired so that grounded conductor is unbroken; switches
in all cases being connected in ungrounded conductor.
3. Connections throughout the entire job shall be made with solderless type devices
of approved design satisfactory to Inspector of Wires.
4. All taps and splices shall be insulated equal to that of conductor insulation.
5. All conductors of each feeder in pull boxes etc. shall be grouped, tied together,
supported, and identified.
6. All conductors in panelboards and other wiring enclosures shall be neatly formed
and grouped.
7. All conductors of emergency only and/or normal/emergency shall be run in
separate raceway systems to final outlet box.
8. Provide support for conductors in vertical raceways in accordance with Article
300-19.
9. Strip insulation from conductors with approved tools and only of sufficient length
for proper termination. Cutting of conductor stranding is unacceptable.
10. Taps from paralleled conductors shall be of a type which tap each conductor,
such as ILSCO "PTA" series.
11. Grounding conductors are to be identified as to associated power circuits.
3.06 BRANCH CIRCUITS
A. Provide all branch circuit wiring and outlets for a complete and operating system. The
system shall consist of insulated conductors connected to the panelboards and run in
raceways or as cable systems if permitted under products section, as required to the
final outlet and shall include outlet boxes, supports, fittings, receptacles, plates, fuses,
etc.
B. Physical arrangement of branch circuit wiring shall correspond to circuit numbering on
Drawings. Combining of circuits and raceways will be allowed up to a 3 phase, 4 wire
circuit in a single raceway, unless shared neutrals are not allowed by other sections of
this Division, or are indicated as separate neutrals on the Drawings. Any combination
of homeruns such as this, however, shall be indicated on record Drawings. Combining
of conductors and raceways for tenant fitup work is allowed only for fitup boxes in
accordance with details on Drawings. When a common grounded conductor is used for
more than one circuit, the arrangement shall be such that a receptacle, fixture, or other
device may be removed or disconnected without disconnecting the grounded conductor
for other circuits. Ground fault circuit breakers and isolated ground outlets shall be
wired with separate neutrals and separate grounding conductors per circuit. A
consistent phase orientation shall be adhered to throughout project at terminations.
C. Circuits feeding three phase equipment shall not be combined into common raceways,
unless specifically indicated.
D. All wiring in panelboards and cabinets shall be neatly formed and grouped.
3.07 FIREPROOFING AND WATERPROOFING
A. Fireproof and waterproof all openings in slabs and walls.
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RK Finn/Ryan Road and Leeds Elementary Schools
Northampton, Massachusetts
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3.08 CUTTING AND PATCHING
A. All cutting of surfaces, including core drilling of walls and slabs, shall be done by
General Contractor.
B. Patching shall be provided by Electrical Contractor.
3.09 DEMOLITION, REMOVAL AND RELOCATION WORK
A. The Electrical Subcontractor shall be responsible for disconnection and removal of
existing electrical equipment and wiring. Refer to drawings for extent of work. Field
confirm existing equipment scheduled to remain and reefed when interrupted by
equipment removal.
3.10 STORAGE AND INSTALLATION OF EQUIPMENT
A. The electrical subcontractor shall store and install electrical equipment and wiring listed
for dry locations only within the building.
END OF SECTION