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Engineering
Electrical Engineering
What gauge wire to use? noob circuits
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[QUOTE="Asymptotic, post: 5804099, member: 621744"] For what you are doing it would be considered chassis wiring. Power transmission wiring usually refers to the aluminum, or aluminum/copper clad wires used for high voltage transmission lines. I don't know what they are referring to in the above chart. What is a wire? [LIST] [*]Conductor material (copper, tinned copper, aluminum, nickel, silver, etc.). [*]# of strands (1 strand = solid, as in house wiring, or multiple strands of lighter gauge wire, i.,e. - 7x32 is 7 strands of 32 AWG) [*]Insulation material (cloth, rubber, plastic, mica, etc.), thickness, temperature and voltage limits. [/LIST] What type of wire is appropriate depends on what it is used for. For instance, solid wire is fine for house wiring, but a very poor choice where a lot of flexing is involved. Spark plug wires have very thick insulation because they must operate at high voltage. Cloth covered, silicone rubber insulated copper wire is a good choice for motor leads, but TGGT or (Teflon-Glass-Glass-Teflon) or MG (Mica-Glass) nickel-alloy wire must be used inside industrial ovens, and other high temperature environments. A lot of it boils down to how hot the wire can be allowed to be. Ambient temperature matters, as does whether it is a single conductor in free air (good cooling), or multiple conductors enclosed within conduit. For 8.1 amps, 16 AWG copper covers all the bases, but for short runs in open air at room temperature you can get away with wire as small as 20 AWG. For each set of (6) 8.1A light bars, the wires to the power supply carry 48.6 amps. What I don't understand is how a 20A, 240W power supply will work with 16 light bars at 8.1 amps each (1166W). [/QUOTE]
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What gauge wire to use? noob circuits
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