Specifications

Field Standards - Appendix C
Cable Pulls -
(continued)
The best place to run the cable is through the roof support structure. Do not leave
the wire laying on the grid as this is not acceptable according to the NEC. When
penetrating fire walls be sure to fill the hole with approved fire stop compound or
inform the G.C. that it needs to be done. Stay away from higher voltage wires and
all other trades low voltage wires. Keep in mind that other trades are carrying
data on their lines which can cause EMI in ours.
Stay away from other trades:
6” from <2KV lines
1’ from HiV lighting
3’ from 5KV lines
3.5’ from transformers / motors.
RISER CLOSETS:
Riser closets are an integral part of system wiring. Connections, test points and
some equipment will be housed in these small closets. The same care that is taken
into making a rack look good should be used here. When pulling wire through
riser closets keep signal types separated and neatly dressed. It is very important to
prevent wires from tangling or interweaving within conduit between floors. All
wires need to be supported on every floor as soon as that particular pull is
complete. This relieves the strain on the cable and prevents cable stretching and
disfiguring. If multiple pulls through the same conduit are necessary, group them
separately and strain relief all pulls separately until all the wire is pulled and
routed to its final destination. When all wire has been pulled, the separate bundles
of like signals can be dressed together in one large neatly combed group. Ideally,
all the wires on the outside of the bundle can be followed from the top closet to
the bottom without weaving in and out of the bundle.
PULLING TOOLS:
When pulling wire through conduit, you can use many methods. One is to use a
fish tape with a pulling grip (Hubble 6CO95, 6C107, 6D212). Twisted nylon
twine (Jet Line) is rated at 165lbs. tensile strength and is sucked or blown through
conduit with a shop vac and a conduit piston (Greenlee 608 1/2” to 613 2”).
Pulling lubricant Greenlee Gel-q 5C647) makes pulls much easier. Wires have
pulling tensions per cable that cannot be exceeded. These tensions also apply to
wire installed vertically in riser closets.
24awg :4lbs. 20awg :12lbs. 16awg :30lbs.
22awg :7lbs. 18awg :19lbs. 14awg :48lbs.
12awg :77lbs.