12 v power cable brown / blue colours ??
#1
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12 v power cable brown / blue colours ??
Have a 12v power cable feeding from a small power supply unit here that has a brown wire and a blue wire, anyone confirm what colour is positive and what is negative ?? obviously dont want to get them the wrong way around !
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#5
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Either:
1/ Plug it in, switch it on, and stick a volt meter across the wires in question
2/ If you can get to the terminal connections on the power supply it should tell you on the board next to them.
3/ If you can't get to them, it should tell you on the supply unit's label.
If none of the above is possible don't use it, because power supply units from reputable manufacturers never have blue or brown low voltage DC cables
1/ Plug it in, switch it on, and stick a volt meter across the wires in question
2/ If you can get to the terminal connections on the power supply it should tell you on the board next to them.
3/ If you can't get to them, it should tell you on the supply unit's label.
If none of the above is possible don't use it, because power supply units from reputable manufacturers never have blue or brown low voltage DC cables
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I'd expect brown to be +12V and blue to be 0V actually - though there is absolutely no convention for low voltage wiring, manufacturers can and do use whatever colours they like in whatever order they like. There's no substitute in this case for measuring it with a meter.
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