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The fuse or circuit breaker amp rating dictates the size of the wire and capacity limitations for the circuit. If you need more amps, you need bigger wire.
WHITE = 14-gauge wire, 15-amp circuit YELLOW = 12-gauge wire, 20-amp circuit ORANGE = 10-gauge wire, 30-amp circuit ...
10-gauge wire Appropriate for a two-pole 20-amp breaker or a single-pole 30-amp breaker. 8-gauge or 6-gauge wire Used for 40-, 50- and 60-amp two-pole breakers; large appliances.