Should I Use Copper Wire or Aluminum Wire?Ĭopper wire is most often used for residential sub-panels and other electrical components. This number is usually indicated by a label found on the wire coating or insulation. The smaller the gauge, the thicker the wire, and the more amperage it can support. The gauge number refers to the thickness of the wire. A #14 AWG wire is typically acceptable for a circuit with general lighting and electrical receptacles. A #10 AWG wire may be used for a 30-amp appliance while a #8 AWG wire can accommodate a 45-amp appliance. How a Sub-Panel Wire Differs from Standard Home Wiringįor any wire, the proper size is determined by the circuit’s amp rating and type of electrical installation. The sub-panel contains circuit breakers serving areas like a garage, home addition, or shed. The wire connects the sub-panel to a main feeder breaker disconnect, which is connected to a 200-amp meter box.
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