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Project Number: 228730 WWTE SCADA Upgrades
Issue Date: August 2017 Nashua, NH

shall be enclosed in separate conduit or separate conduit systems as indicated on
the Contract Drawings and as specified herein.

C. Any run of conduit between outlet and outlet, between fitting and fitting, or
between outlet and fitting shall contain not more than the equivalent of three 90-
degree bends, including those bends located immediately at the outlet or fitting.
Field bends shall be made in accordance with the manufacturer's
recommendations, which normally require use of a one-size-larger bender than
would be required for uncoated conduit. Installed conduit and fittings shall be
free of dirt and trash and shall not be deformed or crushed. Empty conduit shall
have a pull rope stalled.

D. Conduit shall be installed with a minimum of 3 inches of free air space separation
from mechanical piping..

E. Install exposed conduits, parallel or perpendicular to walls, ceilings, or structural
members. Do not run through structural members. Avoid horizontal runs within
partitions or sidewalls. Avoid ceiling inserts, lights, or ventilation ducts or outlets.
Do not run conduits across pipe shafts or ventilation duct openings and keep
conduits a minimum of 6 inches from parallel runs of flues, hot water pipes, or
other sources of heat. Wherever possible, install horizontal raceway runs above
water and steam piping.

F. Do not run conduits exposed on the exterior surface of buildings. Conduits
penetrating exterior walls below grade, at grade floors, or below grade floors shall
be sealed to prevent moisture migration. The exterior of the conduit shall be
sealed with a mechanical pipe seal. The interior conduit seal shall be a gland type
sealing bushing or RTV closed cell silicone foam. Ensure that conduits do not
retain water against these seals.

G. Raceways penetrating fire rated walls, floors, and partitions shall be sealed with a
fire rated sealant.

H. All conduits shall be supported with materials specifically made for this purpose.
Do not use wire hangers. Do not attach any parts of the raceway system to
ventilation ducts. Conduit supports shall be attached to the building. Support
conduits on each side of bends and on a spacing not to exceed the following: 6
feet for conduits smaller than 1 1/4 inches and 8 feet for conduits 1 1/4 inches and
larger. Support riser conduits at each floor level with clamp hangers. All
underground conduits shall be securely anchored to prevent movement during
placement of concrete or backfill. Use precast separators and heavy gauge wire
ties or other approved fasteners.

I. Provide E.Y'S. seal fittings with appropriate potting material where conduits enter
or leave a Class 1, Division 1 or 2 environments or a Class 2, Division 1 or 2
environment, and chemical rooms.

RACEWAYS, BOXES AND SUPPORTING DEVICES
WOODARD & CURRAN 26 05 34-9

Project Number: 228730 WWTE SCADA Upgrades
Issue Date: August 2017 Nashua, NH

J.

Conduit connections to boxes and fittings shall be supported not more than 36
inches from the connection point. Conduit bends shall be supported not more
than 36 inches from each change in direction. Conduit shall be installed in neat
symmetrical lines parallel to the centerlines of the building construction and the
building outline. Multiple runs shall be parallel and grouped whenever possible
on common supports. Exposed ends of conduit without conductors shall be
sealed with watertight caps or plugs.

Bonding wires shall be used in flexible conduit for all circuits. Flexible conduit
shall not be considered a ground conductor.

Liquid tight flexible metallic conduits shall be used in wet and oily locations and
to complete the connection to motor-driven equipment.

Electrical connections to vibration-isolated equipment shall be made with flexible
metallic conduit in a manner that will not impair the function of the equipment.

A polypropylene pull rope with a tensile strength not less than 130 pounds shall
be installed in empty conduit.

Installation of Underground Conduit

1. Minimum of 3/4 inch conduit in or under concrete slab on grade.

2. Where conduits are installed in concrete slabs, on the ground,
underground, or exposed to the weather, make all joints liquid tight and
gas tight.

3. Bury all underground conduit, except under concrete slabs placed on fill,

to a depth of at least 30 inches below finished grade unless otherwise
indicated on the Drawings.

4. Slope ducts to drain away from buildings into manholes and/or handholes.
Adjust final slopes to coordinate with existing site utilities.

5. Install on undisturbed soil where possible. . Use pit run gravel and sand,
placed 8 inch lifts and compacted for backfill.

6. Reference Specification 26 05 43 UNDERGROUND DUCTS AND
RACEWAYS FOR ELECTRICAL SYSTEMS for further requirements.

Installation of Rigid Metal Conduit

1. Ends of conduit shall be cut square, reamed and threaded, and joints shall
be brought butt-to-butt in the couplings. Joints shall be mechanically
tight. Conduit shall be protected against damage and the entrance of water
or foreign material during construction.

RACEWAYS, BOXES AND SUPPORTING DEVICES

WOODARD & CURRAN 26 05 34-10

Project Number: 228730 WWTE SCADA Upgrades
Issue Date: August 2017 Nashua, NH

2. Ninety-degree bends of conduit with a diameter larger than 1 inch shall be
made with factory-made elbows. Conduit elbows larger than 2 % inches
shall be long radius. Field-made bends and offsets shall be made with an
approved hickey or conduit-bending machine. Changes in directions of
runs shall be made with symmetrical bends or cast-metal fittings.

3. At connections to sheet metal enclosures and boxes, a sufficient number of
threads shall project through to permit the bushing to be drawn tight
against the end of the conduit, after which the locknut shall be pulled up
sufficiently tight to draw the bushing into firm electrical contact with the
box. Conduit shall be fastened to sheet metal boxes and cabinets with two
locknuts where required by NFPA 70 where insulating bushings are used,
where bushings cannot be brought into firm contact with the box, and
where indicated.

4. Conduit joints shall be made with tapered threads set firmly. Each length
of conduit cut in the field shall be reamed before installation. Where
conduit is threaded in the field, each threaded end shall consist of at least
five full threads. Corrosion-inhibitive compound (cold galvanizing paint)
shall be used on all conduit threads or any locations where the original hot
galvanized surface has been compromised.

5. Conduit stubbed-up through concrete floors for connections to free-
standing equipment except motor-control centers, cubicles, and other such
items of equipment shall be provided with a minimum of a 12” riser above
the floor slab is of sufficient thickness; if not, a floor box shall be provided
and set flush with the finished floor. Conduits installed for future use shall
be terminated with a coupling and plug set flush with the floor.

3.02 SUPPORTING DEVICES

A.

Install supporting devices to fasten electrical components securely and
permanently in accordance with NEC requirements.

Coordinate with the building structural system and with other electrical
installations.

Conform to manufacturer's recommendations for selection and installation of
supports.

Install individual and multiple (trapeze) raceway hangers and riser clamps as
necessary to support raceways. Provide U-bolts, clamps, attachments, and other
hardware necessary for hanger assembly and for securing hanger rods and
conduits.

Support parallel runs of horizontal raceways together on trapeze type hangers.

RACEWAYS, BOXES AND SUPPORTING DEVICES

WOODARD & CURRAN 26 05 34-11

Project Number: 228730 WWTE SCADA Upgrades
Issue Date: August 2017 Nashua, NH

F.

Support individual horizontal raceways by separate pipe hangers. Spring steel
fasteners may be used in lieu of hangers only for 1 1/2 inch and smaller raceways
serving lighting and receptacle branch circuits above suspended ceilings only. For
hanger rods with spring steel fasteners, use 1/4 inch diameter or larger threaded
steel. Use spring steel fasteners that are specifically designed for supporting
single conduits or tubing.

In vertical runs, arrange support so the load produced by the weight of the
raceway and the enclosed conductors is carried entirely by the conduit supports
with no weight load on raceway terminals.

Support miscellaneous electrical components as required to produce the same
structural safety factors as specified for raceway supports. Install metal channel
racks for mounting cabinets, panelboards, disconnects, control enclosures, pull
boxes, junction boxes, transformers, and other devices.

Install sleeves in concrete slabs and walls and all other fire rated floors and walls
for raceways and cable installations. For sleeves through fire rated wall or floor
construction, apply UL listed fire-stopping sealant in gaps between sleeves and
enclosed conduits and cables.

3.03 BOXES AND FITTINGS

A.

Pullboxes shall be furnished and installed where necessary in the conduit system
to facilitate conductor installation. Conduit runs longer than 100 feet or with
more than three right-angle bends shall have a pull box installed at a convenient
intermediate location.

Boxes and enclosures shall be securely mounted to the building structure with
supporting facilities independent of the conduit entering or leaving the boxes.

Bonding jumpers shall be used around concentric or eccentric knockouts.
Installation of Outlet Boxes

1. Use nonmetallic boxes in corrosive areas such as chemical feed area and
as designated on the plans.

2. Use explosion proof boxes in Hazardous areas as identified on the
Drawings.
3. Use cast metal boxes in all other locations. Each box with associated

covers and fittings shall have a NEMA rating for each location installed.
Installation of Pull and Junction Boxes

1. Use dust-tight and oil-tight boxes (NEMA 12) in other dry interior areas.

RACEWAYS, BOXES AND SUPPORTING DEVICES

WOODARD & CURRAN 26 05 34-12

Project Number: 228730 WWTE SCADA Upgrades

Issue Date: August 2017 Nashua, NH
2. Use explosion proof boxes (NEMA 7) in hazardous areas as designated on

the plans.
3. Use watertight boxes (NEMA 4X) for exterior and wet locations on

outdoor structure where moisture is present.

4. Use corrosion resistant watertight boxes (NEMA 4X) for wet locations and
corrosion filled areas, such as the chemical feed area, and as identified on
the Drawings.

END OF SECTION

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Project Number: 228730 WWTE SCADA Upgrades
Issue Date: August 2017 Nashua, NH

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Project Number: 228730 WWTE SCADA Upgrades
Issue Date: August 2017 Nashua, NH

SECTION 26 27 26

WIRING DEVICES

PART 1 - GENERAL

1.01 DESCRIPTION OF WORK

A. The Contractor shall provide the labor, tools, equipment, and materials necessary
to furnish and install wiring devices in accordance with the plans and as specified
herein.

B. This section includes the following:

1. Flush Wiring Devices
2. Control Relays
3. Motor Control Relays/Contactors
4. Control Stations
1.02 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and
Supplementary Conditions apply to this section.

B. Related Sections

1. Division 26: Section 26 05 00 COMMON WORK RESULTS FOR
ELECTRICAL

2. Division 26: Section 26 05 19 LOW-VOLTAGE ELECTRICAL POWER
CONDUCTORS AND CABLES

3, Division 26: Section 26 05 26 GROUNDING AND BONDING FOR
ELECTRICAL SYSTEMS

4. Division 26: Section 26 05 34 RACEWAYS, BOXES & SUPPORTING
DEVICES

WIRING DEVICES
WOODARD & CURRAN 26 27 26-1

Project Number: 228730 WWTE SCADA Upgrades
Issue Date: August 2017 Nashua, NH

1.03 QUALITY ASSURANCE
A. Reference Standards
1. NATIONAL ELECTRICAL CODE (NEC)
2. | UNDERWRITER'S LABORATORIES, INC. (UL)

3. NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION
(NEMA) COMPLIANCE

1.04 SUBMITTALS

A. Furnish manufacture’s product data, test reports, and materials certifications in
accordance with the specifications.

PART 2 - PRODUCTS
2.01 FLUSH WIRING DEVICES

A. Wall Switches

1. Wall Switches shall be specifications grade, toggle operated, quiet type
alternating current (ac) switches, NEMA heavy duty class, rated at 20
ampere, 120/277 v. Provide matching two pole, 3-way or 4-way switches
as indicated. Switches shall be white in color. Comply with UL 20 and
NEMA Standards.

2. Where two or more switches are to be installed at the same location, they
shall be mounted in one-piece ganged switch boxes, with appropriate gang
cover plate.

3. Provide waterproof switches where indicated.

4. Explosion Proof Switches: Explosion Proof/Dust-Ignition Proof Wall
Switches shall be specifically approved by Underwriters’ Laboratories,
Inc., or Factory Mutual for particular "Class," "Division," and "Group" of
hazardous locations involved. Switches shall be tumbler operated equal to
Appleton EDS Series, Crouse Hinds, or approved equal. Switches shall be
factory sealed specifically designed to a U.L. standard so that any arcing
devices are within a chamber which contains any explosions. Switches
shall be approved for installation without any additional external sealing
fittings. Switches shall be specifically designed to accept conduit sizes
indicated on the Contract Drawings.

B. Receptacles

WIRING DEVICES
WOODARD & CURRAN 26 27 26-2

Project Number: 228730 WWTE SCADA Upgrades
Issue Date: August 2017 Nashua, NH

1. Convenience receptacles for interior use shall be specification grade,
industrial heavy duty type, 20-ampere, 125-volt ac, 2-pole, 3-wire, back
wiring, metal plaster ears, single, duplex (as indicated) grounded,
conforming to NEMA FB 11, NEMA WD 1 and to the 5-20R
configuration in NEMA WD 6. Receptacles shall be white in color.
Provide waterproof in-use covers where indicated and required.

2. Ground Fault Interrupter (GFI) Receptacles shall be specification grade.
Provide 20 ampere, "feed through" type ground fault circuit interrupter,
with integral heavy duty NEMA 5 20R duplex receptacles arranged to
protect connected downstream receptacles on same circuit. Provide unit
designed for installation in a 2 3/4 inch deep outlet box without adapter,
grounding type, Class A, Group 1. Receptacles shall be white in color.
Provide waterproof in-use covers where indicated and required.

3. Locking receptacles shall conform to NEMA WD 6. One (1) plug shall be
furnished with each locking receptacle.

4. Receptacles shall meet the requirements for retention of plugs, overload,
temperature, and assembly security in accordance with NEMA WD 1.

5. Special purpose outlets: NEMA heavy duty class, grounding type with
matching plug. Coordinate NEMA type with equipment manufacturer.

6. Explosion Proof Receptacles: Explosion Proof/Dust-Ignition Proof
Receptacles shall be specifically approved by Underwriters' Laboratories,
Inc., or Factory Mutual for particular "Class," "Division," and "Group" of
hazardous locations involved. Receptacles installed in hazardous locations
shall be factory sealed as provide by Appleton Contendor U-Line Series,
Crouse Hinds, or approved equal. Receptacles shall be 20 amp rated
designed with dead front construction. To operate, a matching plug shall
be utilized. When the plug is inserted and rotated, the receptacle shall be
activated. Receptacles shall be approved for installation without any
additional external sealing fittings. Receptacle enclosures shall be
constructed of copper-free aluminum and malleable iron. Provide each
receptacle with matching 20 amp plug. Plugs shall be constructed of
thermoplastic polyester specifically designed for use where moisture and
corrosion may be present. Plugs shall be designed for use with general
purpose receptacles in non-classified locations. Provide each receptacle
with two (2) spare matching plugs.

WIRING DEVICES
WOODARD & CURRAN 26 27 26-3

Project Number: 228730 WWTE SCADA Upgrades
Issue Date: August 2017 Nashua, NH

C.

D.

Device Plates

1. Device plates for receptacles shall be stainless steel.
Weatherproof Device Plates

1. Provide weatherproof device plates where indicated and required.

2. Interior and Exterior Wet Locations: Device plates for interior and exterior
wet locations shall be die-cast aluminum, gasket, with corrosion resistant
screws to match plate cover finish. Provide weatherproof receptacles with
vertical “in-use” covers for complete weatherproofing when plug is
inserted.

2.02 CONTROL RELAYS

A.

mo Oo 8

Control Relays: Allen Bradley Bulletin 700-H Series, Square D or equal.
120V coil as required or as indicated.

Number of poles as indicated or required.

Electrically Held, except as noted.

Enclosure shall be NEMA-1, except as noted.

2.03 MOTOR CONTROL RELAYS/CONTACTORS

To Oo FP YP

7

G.

Allen Bradley, Square D or equal.

120V and 277V coils as required or as indicated
Number of poles as indicated or required.
Horsepower rated for connected motor.
Electrically Held, except as noted.

Enclosure shall be NEMA-1, except as noted.

600V Rated.

2.04 CONTROL STATIONS

A.

Enclosures shall be common or grouped mounted for devices in the same location.
Devices shall include front mounted nameplates identifying function.

Subject to compliance with requirements, provide control stations by one of the
following:

WIRING DEVICES

WOODARD & CURRAN 26 27 26-4