Cable marking
Cable marking
(OP)
Guys,
Should the coatings of cores of cables be of different colors along the full length according to NEC? What to do if the PVC covers of the same color? Then could they be dyed or taped at ends according to accepted color marking? Won't this contradict NEC?
Thanks
Should the coatings of cores of cables be of different colors along the full length according to NEC? What to do if the PVC covers of the same color? Then could they be dyed or taped at ends according to accepted color marking? Won't this contradict NEC?
Thanks






RE: Cable marking
Will only qualified persons service the conductors?
RE: Cable marking
NEC 2002 200.6 for the identification of Grounded Conductors.
NEC 2002 250.119 for the identification of Equipment Grounding Conductors.
Depending on your circuit configuration, make sure the applicable Grounded / Equipment Grounding Conductors meet the above Code References.
Then, your Ungrounded Conductors need to be clearly distinguishable from the Grounded / Equipment Grounding Conductors.
RE: Cable marking
I have installed many multi conductor control cables (14 AWG) which contained all black conductors. The conductors were numbered for identification. There was a bare ground conductor. Because of the absence of an identified circuit conductor(s) there are circumstances in which it would probably be prohibited to use these cables for power circuits.
yours
RE: Cable marking
If you were wiring say 14 solenoid valve such as for cleaning the bags in a baghouse you can go over to Belden and get cables that have black-white-red trios and retag the red wires green.
RE: Cable marking
Thanks for the information.
The Canadian code is a lot more restrictive on methods of marking. However, the solenoids you mentioned could be classed as a control circuit and wired with the all black wire. Actually, one installation with all black conductors was for hot gas defrost solenoids for refrigeration. For sizes below #2, there is a requirement that the marking be Continous which effectively rules out marking just the ends of the cables.
The Belden configuration you mentioned would probably be acceptable in Canada if the assembly contained one bare or green ground wire that would be used as a common ground.
yours
RE: Cable marking
I just wanted to use it instead of a power cable. And if you had such a precedent in your life, can I use it as a power cable?
Thanks,
RE: Cable marking
NEC allows field marking of phase, neutral, ground, etc, at least it did the last time I looked. The colored strip could be a problem if green or white is used. Per NEC, green color can only be used for grounding conductor and white or grey can only be used for neutral conductor. From an NEC standpoint, all black would be better than the colored marking strips.