Has this already been installed? Do you have any good reason to make it some color other than white or gray?Īlso, please note that if this is factory-installed wiring located in a switchboard, then most likely the wiring is type SIS, which is ALWAYS gray in color, and factory wiring does not fall under the scope of the NEC.Īnd "wahala-wasahala", or however you say "welcome" in Saudi Arabia (that one phrase constitutes my entire Arabic vocabulary). Your best bet is probably to call up your local inspector or plan reviewer, and see what he thinks. Unfortunately, I've always found 725 to be a very difficult article to read/understand/apply. 277-480 is Brown Orange Yellow for line and Gray or. And even then, I think it could possibly be interpreted either way. For AC Current the industry standard is: 120-240 VAC is Black, Red, Blue for Line and White for Neutral. ![]() ![]() That said, I can't find anything in the NEC that would permit you're neutral to be any color but white or gray (grey?). This is considered Class 1 control wiring per NEC 725. This comes from the transformer usually located in the air handler for split systems. When I was an apprentice there was a very strict 'correct' wire colour to be used for each tube pin and heaven help anyone who used the wrong colour to connect a grid or a screen or cathode or whatever. You're routing from a CT cabinet or similar, via conduit or similar, to some remote devices.ģ. Thermostat terminal designations and thermostat wiring color chart. 1 I am about to start wiring a new tube amp and did a search for 'standard' wire color (or colour for us down under) codes. ![]() This is not factory-installed wiring, and it's not all contained within a switchboard. This is field-installed wiring, routed outside of a switchboard.
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