SECTION 16110 RACEWAYS Part 1 - General

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New York TRACON Facility

Raceways

Federal Aviation Administration

16060/
1

November
20, 2006

SECTION 16110


RACEWAYS


Part 1
-

General


1.01

SCOPE

A.

This section specifies the furnishing and installation of electrical raceway systems.

Raceways include the following:

1.

Rigid galvanized steel (RGS) conduit, zinc coated.

2.


Intermediate metal conduit (IMC).

3.


Electrical metallic tubing (EMT).

4.


Flexible metal conduit.

5.


Liquidtight flexible conduit.


1.02


APPLICABLE DOCUMENTS

-

The following specifications and standards of the
issues currently in force, form a part of this section, and are applicable as specified
h
erein:

A.


A
merican National Standards Institute (ANSI)

1.


C80.1:

Rigid Steel Conduit, Zinc
-
Coated (RGS).

2.


C80.3:

Electrical Metallic Tubing, Zinc
-
Coated (EMT).

3.


C80.6:

Intermediate Metal Conduit Zinc
-
Coated (IMC).


B.

Federal Specifications (FS)

1.


W
-
C
-
566:

Flexibl
e Metal Conduit.

2.


W
-
C
-
586:

Conduit Outlet Boxes, Bodies, and Entrance Caps.


C.

National Electrical Contractors Association (NECA)


D.

National Electrical Manufacturers Association (NEMA)

1.

FB1:

Fitting, Cast Metal Boxes, and Conduit Bodies, and Cable
Assemblies.

2.

OS1:

Sheet
-
Steel Outlet Boxes, Device Boxes, Covers, and Box
Supports.

3.

250:

Enclosures for Electrical Equipment (1000 Volts and Below).

4.

ICS
-
6:

Industrial Control System Enclosure.


E.

National Fire Protection Association (NFPA)

1.


70:

National Electrical Code
(NEC).


F.

Occupational Safety and Health Administration (OSHA)

1.

29 CFR 1910.7:

Definitions and Requirements for a Nationally
Recognized Testing Laboratory (NRTL).




New York TRACON Facility

Raceways

Federal Aviation Administration

16060/
2

November
20, 2006

G.

Underwriters Laboratories (UL). Materials having UL listings shall bear the UL
label:

1.


Flexi
ble Metal Conduit.

2.


Surface Metal Raceways and Fittings.

3.


Rigid Metal Conduit.

4.


Enclosures for Electrical Equipment.

5.


Liquid
-
tight Flexible Metal Conduit.

6.


Wire Connectors and Lugs for Use with Copper Conductors.

7.


Metallic Outlet Boxes.

8.


Fittings for Cond
uit and Outlet Boxes.

9.


797:Electric Metallic Tubing.

10.


870:Wireways, Auxiliary Gutter, and Associated Fittings.

11.


1242:Intermediate Metal Conduits.


H.

Steel Structures Painting Council (SSPC)

1.

PS
-
10.01:

Hot
-
applied coal tar enamel painting system.


Part 2
-

Ma
terials


2.01

CONDUIT AND FITTINGS

A.

Rigid Galvanized steel conduits (RGSC)

1.


Fittings
-

Threaded, malleable iron, either cadmium plated or hot dipped
galvanized.


B.

Electrical Metallic Tubing (EMT)

1.

Galvanized electrical steel tubing.

2.

Fittings shall be compression t
ype, malleable iron, either cadmium plated or
hot
-
dipped galvanized. Set
-
screw connections shall not be used.


C.

Flexible conduits
-

Flexible conduits of 6 inch minimum length shall be used for
connections to motors, transformers and to equipment subject to

vibration or
movement unless otherwise shown. Liquid
-
tight flexible conduits shall be used in
wet locations.


2.02

Minimum size raceway shall be 3/4 inch, unless otherwise noted. Conduit for
telephone and signal systems shall be as follows:

A.

1/2
-
inch conduit
may be used for lengths not exceeding 50 feet. 3/4
-
inch
conduit may be used for lengths not exceeding 100 feet.

B.


1
-
inch conduit shall be used for lengths exceeding 100 feet.

C.


No run shall contain more than two (2) 90 degree bends, or the equivalent.

D.


Prov
ide pull and junction boxes as required to meet the above criteria.


2.03

Changes in direction or runs shall be made with symmetrical bends or cast
-
metal
fittings. Field
-
made bends and offsets shall be made with an approved hickey or
conduit
-
bending machine.
Crushed or deformed raceways shall not be installed. Care
New York TRACON Facility

Raceways

Federal Aviation Administration

16060/
3

November
20, 2006

shall be taken to prevent the lodgment of plaster, dirt, or trash in raceways, boxes,
fittings and equipment during the course of construction. Clogged raceways shall be
entirely freed of obstruct
ions or shall be replaced.


Part 3


Installation


3.01

All items shall be installed in accordance with the NFPA 70 or to any more restrictive
requirement of this specification.



3.02


Types according to location or use
-

A.


Indoors
: Use the following wiring methods
:

1.

Connection to Vibrating Equipment (including transformers and hydraulic,
pneumatic, or electric solenoid or motor
-
driven equipment): Flexible metal
conduit, except in wet or damp locations use liquidtight flexible metal
conduit.

2.

Damp, Wet or Exterior Lo
cations: Rigid steel conduit.

3.

Exposed: Rigid metal conduit. Rigid metal conduit shall be used in the
electrical/mechanical room to a height of 8 feet above finished floor.

4.

Concealed: Electrical metallic tubing (EMT) or rigid metal conduit: EMT
shall o
nly be used for lighting, receptacles, fire alarm, and environmental
controls in concealed locations indoors.



B.

Boxes and Enclosures: NEMA Type 1, except in damp or wet locations use
NEMA Type 4
-

stainless steel.


3.03

Conduit Use:

A.

Install electrical metalli
c tubing (EMT) for communication, lighting, and branch
circuits.

B.

Use rigid galvanized steel conduit (RGSC) for all exposed conduit systems
within electrical and mechanical equipment rooms, and electrical closets from
floor level to a height of 8 feet above

finished floor. Conduit for
communications, lighting and branch circuits may be transitioned to EMT above
8 feet above finished floor.

C.

Conduit for critical power feeders and branch circuits, regardless of location,
shall be RGSC.

D.

Metallic conduits must be

mechanically and electrically continuous between
enclosures such as outlet, junction and pull boxes, panels, cabinets, motor control
centers, etc. The conduit must enter and be secured to enclosures so that each
system is electrically continuous througho
ut. Where knockouts are used, provide
double locknuts, one on each side, and bonding jumpers around concentric
knockouts where used. At conduit terminations, provide insulated bushings for
conductor protection. Where conduits terminate in equipment havi
ng a ground
bus, such as in switchgear, motor control centers and panelboards, provide conduit
with an insulated grounding bushing and wire connected to the ground bus.


New York TRACON Facility

Raceways

Federal Aviation Administration

16060/
4

November
20, 2006

E.

Run concealed or exposed conduit parallel or at right angles to building or other
cons
truction lines in a neat and orderly manner. Conceal conduit in finished areas.

Run conduit in or below the floors as directed and with largest radius bends as
possible.


F.

Threads.
-

Clean all threads of rigid conduit. Coat all male threads of conduit
ins
talled in concrete with sealing compound to enhance electrical contact and
provide waterproof joint or connection immediately before being coupled together.

Known Acceptable Source is T and B "KOPR
-
SHIELD", or approved equal.


G.

Running threads
-

Running th
reads will not be allowed.


3.04

Protection
-

Cap raceways stubbed up, including those in cabinets, immediately upon
their installation with steel caps. The use of paper or rag wads will not be permitted.


3.05

Equipment connection


Connect electrical equipment s
ubject to vibration and
movement, and all motors to feeder conduit with liquid
-
tight flexible metal conduit, 24
inches or 10 conduit diameters minimum length, 72 inches maximum length.


3.06

Preparation
-

Place sleeves in the forms of walls and floor slabs for
the free passage of
conduits. Set sleeves in place a sufficient time ahead of concrete placement so as not to
delay the work. Apply approved caulking for sleeves through floors and through
exterior walls. Be sure that plugs or caps are installed before
concrete placement
begins.


3.07

Installation methods

A.

Install each entire conduit system complete before pulling in any conductors; clean
the interior of every run of conduit before pulling in conductors to guard against
obstructions and omissions. Coordinate
layout and installation of raceway and
boxes with other construction elements to insure adequate headroom, working
clearance, and access.


B.

Cut all joints square, then thread and ream smooth. Coat cuts, threads or scratches
on steel conduit with an approve
d zinc chromate or with a 90
-
percent zinc paint.
When dry, draw up tight.


C.

Make bends with standard ells or conduit bent to not less than same radius. Bends
must be free from dents or flattening. Use no more than the equivalent of two 90
-
degree bends in

any run between terminals and cabinets, or between outlets and
junction boxes or pull boxes.


D.

Conduit bodies may be used in lieu of conduit ells where ease of installation and
appearance warrants their use. Conduit bodies larger than one inch may be used

only where approved.


E.

Raceways in furred spaces
-

Install raceways in accordance with code
New York TRACON Facility

Raceways

Federal Aviation Administration

16060/
5

November
20, 2006

requirements. Do not anchor or strap conduits to the ceiling furring channels or
attach to furred ceiling hanger wires. Raceways shall not be attached to the
susp
ension system (wire hangers) of drop ceilings.


F.

Securely fasten and support exposed conduit to metal framing using hot
-
dipped
galvanized, malleable iron, one
-
hole pipe straps or other approved means.
Galvanized tie wires may be used for securing conduits
less than 1
-
1/2 inches if
the conduit is installed through the web of bar joists. Do not use tie wires to
secure any conduit from bottom of bar joists. Branch circuit raceways that are one
inch or smaller may be attached to ceiling support hangers or wal
l studs by use of
manufactured clips.


G.

Pull wire
-

The pull wire shall be #14 AWG zinc
-
coated steel or plastic with a
minimum 200 pound tensile strength. Ten inches of slack shall be left at each end
of the pull wire. Sections of raceways which pass thro
ugh to damp, concealed or
underground locations shall be of a type approved for such locations by the COR,
and shall extend a minimum of 12 inches beyond the damp, concealed, or
underground area.


H.

Use expansion
-
deflection fittings on conduit crossing struc
tural expansion joints
and on exposed conduit runs where necessary.


I.

With a coupling, terminate concealed conduit for future use at structural surfaces.
Install a pipe plug flush with the surface.


J.

Outlet boxes and pull boxes

1.

Rigidly mount all boxes and p
rovide with suitable screw fastened covers.
Plug open knock
-
outs or holes in boxes with suitable blanking devices.

2.

Install pull boxes in locations that will be accessible after completion of the
building. Provide pull boxes or junction boxes to limit con
duit runs to 125 feet

and to limit angles to the equivalent of 180 degrees. Additional pull boxes
may be provided to facilitate wire pulling.


K.

Wireways

1.

Install wireways, where shown, according to NFPA 70 Article 362. Field
apply a 90
-
percent zinc paint c
oating over cuts or scratches before any other
finish is applied. Securely ground raceway and fittings. Provide bushings at
raceway entrances. Wireways shall be hinged cover type. Provide bonding
jumper between cover and interior


do not rely on hinge

for bonding
continuity.

2.

Install surface raceways, where shown, according to NFPA 70 Article 352.
Field apply a 90
-
percent zinc paint coating to cuts or scratches before any other
finish is applied. Securely ground raceway and fittings. Provide bushings

at
raceway entrances.



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