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
U_L. 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" & lgr. Concealed 10 10
4" Exposed 5 7
1", 1-1/4" Exposed 7 8
1-1/2" & lgr. 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.
13089K
