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16050-4
BASIC MATERIALS AND METHODS

Specifications WW-C-581E, ANSI Standard C80.1, ANSI Standard C80.5
UL Standard #6 and NEMA RN1-2005.
The PVC coated rigid galvanized steel (RGS) conduit shall comply with the
below listed specifications without exceptions allowed. PVC coated ngid
galvanized steel (RGS) conduit shall be hot dipped galvanized both
internally & externally. The PVC coated rigid galvanized (RGS) conduit
shall have hot dipped galvanized threads. The external PVC coating shall
be a nominal 40 mils of external PVC coating and 2 mils of blue interior
urethane coating. The PVC coating shall applied by the same manufacturer
of the hot dipped galvanized rigid steel (RGS) conduit.

Conduit bodies and fittings for PVC coated rigid galvanized steel (RGS)

conduit shall be from the same manufacturer as the PVC coated rigid

galvanized steel (RGS) conduit. Conduit bodies shall be coated on the entire
body both internally and externally with 2 mil of blue urethane and exterior
coated with 40mil of PVC coating.

All conduit, conduit bodies, connectors, support systems and accessories in

the corrosive areas, above grade or below grade, shall be coated as specified.

The thickness of the coating is to be a nominal 40 mils except where the

configuration or application of the unit dictates otherwise.

During the manufacturing of the PVC coated rigid galvanized steel (RGS)

conduit, the factory applied hot dipped galvanized coating of both the

internal and external (RGS) conduit shall not be disturbed in any fashion
prior to the application of PVC coating being applied as per UL 6. The PVC
coated rigid galvanized steel (RGS) conduit shall comply with all UL
listings providing the hot dipped galvanized coating as the primary means
of protection of corrosion protection for the conduit, and the PVC coating
shall be listed as a secondary means of corrosion protection as required by

UL 6 and NEMA RN-1-2005.

. Every female opening shall have a plastic sleeve extending one pipe

diameter or 2", whichever is less, beyond the opening. The inside diameter

of the sleeve shall be the same as the outside diameter of the pipe used with
it. The wall thickness of the sleeve shall be the same as the plastic coating.

. Fittings and Accessories:

i. Right angle beam clamps and U-bolts will be provided with PVC
encapsulated nuts that cover all exposed parts of the threads.

ii. U-bolts will be sized to snugly fit the nominal 40 mil coated conduit.

iii. The screw heads on Form 8 condulets shall be stainless steel
encapsulated by the same manufacturer. All conduit bodies used in
wash down, wet or outdoor applications shall be NEMA 4X rated. .

iv. Couplings shall have longitudinal ribs 40 mils in thickness to protect
them from wrenches or channel-locks.

v. All coated conduit and fittings must be installed wherever possible
by a certified trained installer using a tool available from the
manufacturer for the use intended in order to protect the PVC
coating.

The interior coating shall be applied in such a manner so as to allow field

bending without cracking or flaking of the interior coating.

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September 21, 2016

To: Mayor James Donchess
From: Jennifer McCormack, Director
RE: Welcoming America initiative

Dear Mayor Donchess,

After attending the Personnel and Administrative Affairs committee meeting on
Monday, September 18" | wanted to share with you my own experience the Welcoming
America initiative. As an organization the library has acknowledged in the last several years
that the city’s population is becoming more diverse and that we are not adequately reaching
the newest residents with our services. Like you we have read the data from the schools about
their ELL programs and the data about the aging of NH’s population and the rapid influx of
immigrants into our city and our state. We've also seen the turnout at large events like Nashua

Goes Back to School and seen the variety of faces in that crowd: the most compelling evidence

of the increased diversity of our city.

In response to this the library has adopted “Become a Welcoming Space” as one of our
major strategic goals and we are implementing a variety of objectives and activities toward
reaching that goal. Through the Welcoming America initiative we have access to a network of
communities and agencies across the country engaged in the real work of ensuring that the
systems, policies and procedures in place are working to engage newcomers from anywhere in
the world. Of particular relevance to us as a library has been the work done in Nashville and
Dayton, and | have been able to connect directly to people from both of those communities by

attending the Immigrant Integration conference in both 2014 and 2015: a conference

2 Court Street | Nashua, NH 03060 | 603.589.4600 | www.nashualibrary.org

the contract the work described.

3. PERIOD OF PERFORMANCE. Professional Contractor shall perform and complete all work by 10-
31-2023 which date shall only be altered by mutually approved written agreement to extend the
period of performance or by termination in accordance with the terms of the contract. Professional
Contractor shall begin performance upon receipt of an Executed Contract and a valid Purchase
Order issued from the City of Nashua.

4. COMPENSATION. Professional Contractor agrees to perform the work for a total cost not to
exceed

($180,000.00)

The Contract Sum shall include all items and services necessary for the proper execution and
completion of the Work.

Unless Professional Contractor has received a written exemption from the City of Nashua,
Professional Contractor shall submit monthly requests for payment for services performed under
this agreement in accordance with the values stated in the Agreement. Such requests shall be
supported by such data substantiating the Professional Contractor’s right to payment as the City
of Nashua may reasonably require. Professional Contractor shall submit monthly requests for
payment for services performed under this agreement shall be submitted as follows:

> Electronically via email to VendorAPInvoices@ NashuaNH. gov

OR

> Paper Copies via US Mail to:

City of Nashua, City Hall
Accounts Payable

229 Main Street

Nashua, NH 03060

Please_do not submit invoices both electronically and paper copy.

In addition, and to facilitate the proper and timely payment of applications, the City of Nashua
requires that all submitted invoices contain a valid PURCHASE ORDER NUMBER.

Requests for payment shall be submitted no later than fifteen (15) days after the end of each month
and must include a detailed summary of the expenditures reported in a form that supports the
approved budget. Specifically, Professional Contractor agrees to provide the following with each
request for payment:

1. Appropriate invoice forms. The forms shall include the project purchase order number,

a listing of personnel hours and billing rates, and other expenditures for which payment is
sought.

AG 2 of 4

7.

8.

16050-5
BASIC MATERIALS AND METHODS

Approved manufacturers shall be: Rob Roy Plasti Bond, Thomas & Betts-
OCAL or equal.

All fittings shall be of the same material as the respective raceway system.

B. Conductors and Cable

1.

All power wiring conductors (P-X on drawings) shall be insulated for 600 volts,

Type XHHW insulation, unless otherwise noted. Conductors shall be standard

AWG and KCMIL sizes. Conductors shall be 98 percent copper, stranded, heat

and moisture resistant with cross-linked synthetic polymer insulation for all

sizes No. 12 AWG and larger. Smaller sizes shall not be used except for
communications and special systems. For lighting and receptacle circuits, solid
wire may be used in lieu of stranded wire, for No. 12 and No. 10 AWG
only. Conductors shall be labeled with U.L. approval and be marked with the
manufacturer's name, wire size and insulation type. All underground power
cables shall be UL Listed and Labeled for underground use in wet locations.

Acceptable Manufacturers: Okonite, Southwire, Pirelli, or approved

equivalent.

Control Wiring:

a. All control wiring (120 or 24 volt, AC or DC) conductors within buildings
or above grade shall be insulated for 600 volts, unless otherwise noted, and
shall be No. 14 AWG minimum size, or larger if so indicated on the
Drawings. Conductors shall be 98 percent copper, stranded, heat and mois-
ture resistant, and thermal plastic insulated and shall be type
THWN/THHN.

b. All conductors for control wiring located below grade shall be 600V, 98
percent copper, stranded, heat and moisture resistant, with cross-linked
synthetic polymer insulation type XHHW. All underground control cables
shall be U.L. Listed and Labeled for underground use in wet locations.
Acceptable Manufacturers: Okonite, Southwire, Pirelli, or approved
equivalent.

Metal clad cable shall consist of thermal plastic insulated copper conductors, of

size and quantity indicated, protected by a positive interlocked armor of

galvanized steel. The conductors shall be twisted together and shall have an

overall moisture and fire resistant fibrous covering. The cable shall have a

grounding conductor of copper. The cable shall meet the requirements of

Article 330 of the National Electrical Code for "Type MC" Metal Clad Cable

and shall bear the U. L. Label. Acceptable Manufacturers: Okonite, Pirelli,

Houston Wire & Cable, or approved equivalent.

All instrumentation control cables (4-20 mA signal) referred to on the Drawings

as "twisted shielded pairs", shall be rated 600V, 80 deg. C, individually shielded

twisted pairs, No. 16 AWG, stranded conductors of tinned copper with
polyethylene insulation and aluminum-polyester shielding with #18 awg
stranded copper drain wire surrounded by a chrome PVC jacket. Control cable
shall be UL listed with 100% shield coverage. All underground instrumentation
cables shall be U.L. Listed and Labeled for underground use in wet locations.

Acceptable Manufacturers: Belden, Alpha Wire & Cable or approved equal.

Provide instrumentation control cables equivalent to Belden type 8719 or

equivalent unless specified otherwise by the instrument manufacturer.

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16050-6
BASIC MATERIALS AND METHODS

5. Three conductor shielded cable for use with remote potentiometers for varying
motor speeds etc. Cable shall be stranded, tinned copper, polyethylene
insulated, drain wires with aluminum-polyester shielding with #18 awg
stranded copper drain wire surrounded by a chrome PVC jacket. Control cable
shall be rated 600 volt and shall be UL listed with 100% shield
coverage. Acceptable Manufacturers: Belden, Alpha Wire & Cable or
approved equal. Provide three conductor shielded cables equivalent to Belden
type 8618 or equivalent unless specified otherwise by the instrument
manufacturer.

Motor Starters

1. For Single Phase Motors: Fractional Horsepower Manual Motor Starter with
Thermal Overload(s) and a red running indicating light unless noted otherwise:
a. 120 Volt, Single-Pole, H-O-A Selector, Surface Mounted: Square-D FG-71P

2. For Three Phase Motors: Shall be combination starter/disconnect type,
employing magnetic starter (NEMA Size 1 minimum), rated to match the
equipment served, with thermal overload protection for each phase and with an
M.C.P. type circuit breaker/disconnect sized per the circuit breaker
manufacturer's recommendations for coordination with the thermal overload
protection, lights, relays and auxiliary devices. Combination starters shall be
provided with a 480, 240 or 208-120 volt control power transformer with
primary and secondary fusing. Provide 2 N.O. and 2 N.C. auxiliary contacts.

3. Refer to control wiring diagrams on the drawings for specific requirements and
devices.

4. Acceptable Manufacturers:

5. Square-D, Cutler-Hammer, General Electric, Allen-Bradley, Siemens or
approved equal.

Safety Switches

1. All safety switches shall be NEMA Type HD and Underwriters Laboratories
Listed.

2. The handle position shall indicate whether the switch is "ON" or "OFF".

3. All current carrying parts shall be plated to resist corrosion and promote cool
operation. Switches shall have removable arc suppressers where necessary to
permit easy access to line side lugs. Lugs shall be front removable and UL
listed for 60°C or 75°C, aluminum or copper wires.

4. Provisions for padlocking the switch in the "OFF" position with at least three
locks shall be provided.

5. Switches shall have a dual cover interlock to prevent unauthorized opening of
the switch door when the handle is in the "ON" position, and to prevent closing
of the switch mechanism with the door open.

6. Disconnect switches, indicated on the drawing to be used for motors controlled
by variable frequency drives shall be as indicated above, except shall be 4 pole
type switches. The fourth pole shall be wired directly to the disable input, in
series with the safety e-stop, in order to lock-out and immediately shutdown the
drive. The auxiliary 4th pole shall open prior to any of the other three power
poles and shall be designed for proper use with VFD type load circuits.

7. Enclosures

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16050-7
BASIC MATERIALS AND METHODS

a. Safety switch enclosures for non-hazardous locations painted galvanized
steel for NEMA 12 area and stainless steel for NEMA 4X areas.

b. Switches specified as NEMA 7 & 9 shall be furnished in cast aluminum
enclosures with conduit provisions as specified. Enclosures shall be
provided with a bolted cover and with sealing means for hazardous location
protection. "ON" and "OFF" position identification shall be cast into the
cover, not painted on or applied with an adhesive.

8. Acceptable Manufacturers: Square-D, Cutler-Hammer, General Electric,

Siemens, or approved equal.

1. Enclosures

a. Safety switch enclosures for non-hazardous locations painted galvanized
steel for NEMA 12 area and stainless steel for NEMA 4X areas. Refer to
Drawing E-1 for NEMA classifications.

b. Switches specified as NEMA 7 & 9 shall be furnished in cast aluminum
enclosures with conduit provisions as specified. Enclosures shall be
provided with a bolted cover and with sealing means for hazardous location
protection. "ON" and "OFF" position identification shall be cast into the
cover, not painted on or applied with an adhesive.

2. Acceptable Manufacturers: Square-D, Cutler-Hammer, General Electric,

Siemens, or approved equal.

Link Seal

1. Conduit wall and floor seals for cored holes and sleeved openings shall be Link
Seal, Innerlynx or approved equivalent. Refer to the contract drawings for
additional requirements.

Cable Seals

1. Conduit sealing bushings shall be OZ Gedney Co., Type CSB Series or equal.

Conduit Seals-Offs

1. Provide Class I, Div. 1, Group D and Class 1, Div. 2 seals as required by the
N.E.C. Material shall match the conduit in which being installed.

PART 3 - EXECUTION

3.1 INSTALLATION

A.

Unless otherwise noted, wiring for all systems indicated in the Contract Documents
shall consist of insulated conductors installed in raceways in accordance with the
manufacturer's instructions.

1. Raceways shall be continuous from outlet box to outlet box and from outlet box
to cabinet, junction or pull box. Secure and bond raceways to all boxes and
cabinets such that each system of raceways will be electrically continuous
throughout.

1. Contract drawing E-1 NEMA CLASSIFICATIONS FOR ELECTRICAL
EQUIPMENT AND ENCLOSURES indicates the NEMA ratings of each
location at the facility. Unless otherwise indicated on the Drawings and Conduit
Installation Schedule on E-1 install all wiring in the following applicable
raceway system: Wiring above 600 volts in indoor dry locations (NEMA 1 or

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16050-8
BASIC MATERIALS AND METHODS

12) Heavywall aluminum conduit. Galvanized heavy duty rigid steel conduit as

approved by the Engineer.

Wiring 600 volts or less in dry concealed locations [hung above ceilings, attic

areas, or within CMU block walls] (NEMA 1 or 12): Galvanized electrical

metallic tubing (for raceway sizes up to and including 2" trade size) or
galvanized rigid heavy wall steel conduit.

Wiring 600 volts or less in dry exposed indoor locations (NEMA 1 or 12): Rigid

heavy wall aluminum conduit. Galvanized rigid heavy wall steel conduit as

approved by the Engineer.

Wiring 600 volts or less in indoor wet locations or outdoor above grade

locations (NEMA 3R or 4X): Rigid heavy wall aluminum conduit. Galvanized

rigid heavy wall steel conduit as approved by the Engineer.

Wiring 600 volts or less in indoor or outdoor corrosive chemical areas (NEMA

4X Corrosive) (SAL 12/15/14): use PVC-coated rigid steel conduit in these

areas less than 8 feet from finished floor. Use PVC Schedule 80 conduit in these
areas 8 feet or more from finished floor in corrosive chemical areas. Where
conduits transition, a NEMA 4X stainless steel or PVC coated junction box or

pull box must be installed. The metal conduit shall be provided with a

grounding bushing and the metal conduit and metal box shall be bonded to the

ground conductor within the raceway per NEC.

Wiring 600 volts or less in hazardous locations (NEMA 7 or 9): Galvanized

rigid heavy wall steel conduit, PVC galvanized rigid steel conduit, or rigid

heavy wall aluminum conduit.

a. PVC coated rigid galvanized steel (RGS) conduit: manufacturer shall
provide field installers certification training. All installers shall be field
certified from manufacturer and provide proof of certification for
installation upon request.

b. All field installation and repairs of PVC coated rigid galvanized steel (RGS)
conduit shall conform to manufacturer’s recommendation and use of
manufacturer patch and repair kits in order to guarantee certified products
are used and compliance with all factory warranty guidelines are met.

Use of Miscellaneous Conduit Types

a. Flexible "liquid tight" metal conduit shall be used for final connection to
the following:

* all motors * rotating or vibrating equipment

* dry type transformers * recessed lighting fixtures
Lengths of liquid tight flexible metal conduit shall be kept to a minimum
(12 to 18 inches) and maximum length of 2'-6" except when dictated
otherwise by a particular installation approved by the Engineer and as
allowed by NEC.

b. PVC Schedule 80 non metallic conduit shall be used as shown on drawings.

c. Conductors for fire alarm circuits shall be routed in rigid galvanized steel
conduit unless otherwise noted on the drawings. Minimum conduit size
shall be 4".

d. Armored direct burial cable shall be installed underground to equipment as
shown on drawings.

e. Metal Clad cable (MC) shall be installed in the following locations:

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8.

16050-9
BASIC MATERIALS AND METHODS

i. | Used for whips for concealed lights above hung ceiling limited to 3'
in length.

ii. Within studded concealed wood frame walls for receptacles and light
switching.

All signal wiring shall be installed in rigid galvanized steel or PVC coated rigid
galvanized steel conduit.

C. General Raceways Installation Requirements:

1.

ao

10.

11.

12.

13.

14.

Sized as indicated on the Drawings. Where sizes are not indicated, raceways
shall be sized per the National Electrical Code in accordance with the quantity,
size, type and insulation of conductors to be installed. However, raceways shall
be minimum three quarter (3/4") trade size for all installation unless otherwise
noted.

Installed to provide adequate grounding between all outlets and the established
electrical system ground. Bond conduit systems per NEC.

Cut square, free of burrs due to field cutting or manufacture, and bushed where
necessary. Spray all ends of threaded conduit with cold galvanizing spray
compound.

Installed with exterior surfaces not less than six inches (6") from any surface
with a temperature of 200 degrees F or higher.

Plugged at the ends of each roughed-in raceway with an approved cap or disc
to prevent the entrance of foreign materials during construction.

Concealed throughout except where exposure is permitted by the Engineer.
Installed parallel or perpendicular to floors, walls and ceilings.

Installed with a minimum of bends and offsets. All bends shall be made without
kinking or destroying the cross section contour of the raceway. Factory made
bends shall be used for raceways one-inch (1") trade size and larger.

Installed with U.L. approved raintight and concrete-tight couplings and
connectors.

Firmly fastened within three feet of each outlet box, junction box, cabinet or
fitting. Raceways shall not be attached to or supported by wooden plug anchors
or supported from Mechanical Work such as ductwork, piping, etc.

Arranged in a neat manner for access and allow for access to work installed by
other trades.

If itis necessary to burn holes through webs of beams or girders, call such points
to the attention of the Engineer and receive written approval both as to location
and size of hole before proceeding with work. All holes shall be burned no
larger than absolutely necessary.

Where raceways puncture roof, install pitch pockets as required in order that
the roof warranty is maintained.

Where raceways penetrate fire-rated walls, floors, or ceilings, install firestops
equal to the rating of the wall, floor, or ceiling, per specification section 07270,
"Fireproofing".

D. Wiring Methods

1.

Feeder conductors shall be continuous from point of origin to load termination
without splice. If this is not practical, contact the Engineer and receive written

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16050-10
BASIC MATERIALS AND METHODS

approval for splicing prior to installation of feeder(s). Refer to Splicing
Methods listed below.

Do not pull conductors into raceways until raceway system, including all
outlets, cabinets, bushings and fittings, is completed. Verify that all work of
other trades which may cause conductor damage is completed. Use only
ULL. approved cable lubricants when necessary. Do not use mechanical means
to pull conductors No. 8 or smaller.

In general, conductors shall be the same size from the last protective device to
the load.

All wiring systems shall be properly grounded and continuously polarized
throughout, following the color coding specified. Connect branch circuit
wiring at panelboards, as required, in order to provide a "balanced" three-phase
load on feeders.

All feeder connections shall be made to bus and other equipment using
solderless, pressure type terminal lugs, as manufactured by Burndy, National,
O.Z., T. & B., or equivalent.

E. Conduit Support

1.

Support adequately by malleable iron pipe clamps or other approved
methods. In exterior or wet locations and along outside wall supports shall
allow not less than 1/4 inch air space between raceway and wall. Firmly
fasten raceway within 3 feet of each outlet box, junction box, cabinet or
fitting. The following table lists maximum _ spacing between
supports. Additional supports may be required due to field conditions, strength
of supporting members, etc. Furnish and install such supports at no additional
cost to Owner.

Conduit Trade Type of Run | Horizontal Spacing Vertical

Size in Feet Spacing in Feet

34" Concealed 7 10

1:, 1-1/4" Concealed 8 10

1-1/2" & lIgr. Concealed 10 10

5" Exposed 5 7

1", 1-1/4" Exposed 7 8

1-1/2" & Igr. Exposed 10 10

F. Installation of Concrete Envelope

1.

Wherever a cluster of four or more raceways rise out of floor exposed, provide
neatly formed 6" high concrete envelope with chamfered edges around
raceways.

G. Installation of Spare Conduits

1.

At each flush mounted panel-board, terminal cabinet, control cabinet, etc.,
provide four (4) spare three-quarter inch (3/4) raceways from panel-board, etc.
to an area above the nearest accessible ceiling space and floor space in the
specific room location. Make 90 degree turn above the ceiling or below the floor
and cap all conduits.

Where drawings indicate a "Spare" conduit, install a #14 AWG fish wire in all
runs to facilitate future installation of conductors.

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16050-11
BASIC MATERIALS AND METHODS

Installation of Bushings and Grounding Bushings

1. Provide grounding type insulated bushings on all power conduits regardless of
size.

2. Provide grounding type insulated bushings on all control conduit sizes and
signal conduit sizes one and one-quarter inch (I-1/4") trade size and larger.

3. Provide standard bushings for conduits one inch (I") and smaller unless
otherwise stated.

4. Install cable seal bushings in conduits for all outdoor locations and NEMA 4X
locations to prevent moisture from entering enclosures and equipment.

5. Install cable seals in all conduits where there is a change in temperature such as
transitioning from a room to the attic.

6. Provide a bushing at each conduit termination unless fitting at box where
conduit terminates has hubs designed in such a manner to afford equivalent
protection to conductors.

7. Any installations not provided with these requirements shall be removed and
reinstalled at no additional cost to the Owner.

Myers Hubs

1. Myers hubs shall be installed on junction boxes and enclosures which do not
have cast hubs in non classified areas.

Expansion Fittings

1. All conduit installations where conduits extend up out of the ground at
buildings, structures or equipment shall be provided with expansion fittings.

2. Expansion/deflection type fittings shall be provided at all horizontal or vertical
expansion joints, located in new or existing buildings and structures.

Conduit Seals

1. Conduit seals shall be installed in all explosion proof areas Class 1 Division 1,
and Class 1, Division 2 areas. The conduit seal shall be installed per the
National Electric Code Article 501.15 as well as what is shown on the drawings.

2. Upon installation of sealant, the contractor shall mark the conduit seal with
glyptal or permanent marker to indicate that the conduit seal is filled properly.

Link Seals

1. All penetrations through existing and new concrete floors, and walls shall be
core drilled and sleeved, and installed with a link seal.

2. Refer to all details shown on the Contract Drawings for conduit sealing fittings
and weatherproof conduit seals. All conduit penetrations are required to be
provided with seals as noted on the Contract Drawings and as specified. Any
installations not provided with these requirements shall be removed and
reinstalled at no additional cost to the Owner.

Raceways through Wall Bond Outs

1. In specific areas wall bond outs have been designed and shown on the electrical
and structural drawings for conduit installations.

Splicing Methods

1. Feeder conductors shall be continuous from point of origin to load termination
without splice. If this is not practical, contact the Engineer and receive written
approval for splicing prior to installation of feeder(s).

2. For splices and taps, No. 10 AWG and smaller, use solderless "Thread-On"
connectors having spiral steel spring and insulated with a vinyl cap and skirt,

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