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Color Codes – Different color wires serve different purposes, like: Black : Hot wire, for switches or outlets. Red : Hot wire, for switch legs. Also for connect…
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WAZIPOINT Engineering Science & Technology: Standard Colour Code for Electrical Power Cable and Wiring
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UK Wiring Colours For Old and New Cables | Electrical wiring colours, Electrical wiring, Electricity
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wiring - Red for +ve, black for 0v, ...which colour for -ve rail? - Electrical Engineering Stack Exchange
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