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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