I am wiring a hot tub I recently purchased and is a 220V 4 wire connection. The wire is AWG 6. The instruction book shows black and red hot wires for this tub, but the wiring on this tub has black and blue hot wires. The reading I have done always indicates black and red hot wires. I'm guessing some wire companies make blue hot wires. Is there any significance to this not being red that I may not be aware of?
Electrical – What do the color designations of wire mean
electrical
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Best Answer
Ungrounded "hot" conductors can be identified by any means that is not used to identify grounded "neutral", or grounding conductors. So basically if it's not white, gray, any color other than green with three continuous white or gray stripes, green, green with yellow stripes, bare, or any of the other identification methods below, it can be an ungrounded "hot" conductor.
Blue is an acceptable color for the insulation on an ungrounded "hot" conductor.