On 10/15/20 4:47 AM, john@kk9a.com wrote:
Or you can cut the PVC pipe and replace the small portion that has the
spray foam and remove the wires at the same time.
BTW, I am not an electrician so do your research but I believe that it
is a towertalk myth that you cannot run the 120v crank up tower motor
wires in the same conduit as your control lines (assuming that all wires
have the same 600v insulation)
John KK9A
Most coax has a 300V rated jacket (9913 is 300V, for instance, as is
9258 (RG-8X), LMR-400's datasheet doesn't even give a UL rating)
Romex (NM-B) is 600V, as is the usual THHN building wire.
There's some trickyness with respect to the code in running different
voltages. It's not clear that antenna cables are Class 2 wiring - the
rule says that Class 1 and Class 2 can't run in the same conduit, unless
separated by a continuous barrier (is a second layer of insulation, e.g.
Romex, a "continuous barrier"?) -
725-54(a)(1) lets you put low voltage and high voltage in the same
enclosure where the HV is not more than 150 V to ground and "solely to
connect to equipment".
There's a whole bunch of rules about Class 1, 2, and 3, mostly
differentiated by "power limiting".
jimlux wrote:
DO you need to preserve the cables? or can you cut them, and then use a
roto-rooter/plumbers snake approach to clear the conduit?
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