Join Date: Sep 2006
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Re: Yellow ground safety wire
I can see why they did the change as when you use 3 -Phase AC you run out of colors real fast. Using red/Black for DC & white/Black for AC works, as you should never see 1 without the other. High voltage DC is orange.
I'm not sure why not use red/green for DC as minus is usually ground. AC ground is now yellow/green striped, (to comply with euro standards),
Which brings to mind how this got messed up to begin with, each side has repeatedly tried to use electrical codes to get a trade advantage, by making the other groups colors used illegal, and both have refused to adjust color codes to match.
If the UN really wanted to do something usefull, they could mandate a world standard for wiring codes, and electrical power, and save the world trillions of dollars in lost productivity caused by varying electrical codes, (and TV transmissions, and consumer products, phones, etc...). Yes, in each case one of the countries that refused to comply will have to spend billions to retool, but the long term savings, and increased safety will be worth it.
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