Depending on distance, and a few other factors, the wire size for a 30amp load would be #10 AWG. Over long distances the conductor size would be increased to account for any voltage drop. More »

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Either 2/0 gauge copper wire or 4/0 gauge aluminum wire can deliver 200-amp electrical service. Three conductor wire supplies 240 volts of electricity to a main service panel, routing through a main breaker rated for 200... More »

A 100amp service requires a minimum wire size of #1 AWG. Long cable runs would see an increase in wire size. Section 310-15 of the NEC is used to determine wire size, including referencing of table 9. More »

Use a wire gauge amp chart to determine the approximate wire size for an electrical load. There are separate charts for different types of wire. Since the resistance of electricity is dependent on several factors, the ch... More »

A 60-amp load requires a nine-gauge wire or less for chassis wiring and a four-gauge wire or less for power transmission. Safety margins generally dictate using a lesser gauge wire to avoid overloading. These two gauges,... More »

In a circuit, the main load wire — the live power wire between the switch and power source — is typically black, and the secondary load wire is usually red. Wire colors can vary between circuits, so it is best to remove ... More »

To change a circuit breaker, switch off the main circuit breaker, and unscrew the load terminal wire. Remove the old breaker, and reverse the sequence used to remove it to install the new one. Use a voltage tester, a scr... More »

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