![]() Then place the metal frame back into its accustomed position and tighten its screws into place. This is a ready-to-wire screw feature with a. Turn on the electricity, first with the main switch and then by switching the new 30 amp circuit breaker to the "on" position.Īpply the multimeter to the new circuit breaker to confirm that electricity is flowing through it normally. This 30-amp Siemens plug-in circuit breaker has 3 poles, and features Insta-Wire, saving time on installation. This makes sense to me, but Im thrown off by the double-pole configuration. Inspector notes that 10 wire should be used for 30-amp circuits so that the wire does not melt before the breaker can do its job in an over-current situation. Place the new 30 amp breaker into the vacant spot on the breaker panel, then pop it into place or screw it in as appropriate. In the breaker panel its hooked up to a 30-amp double pole breaker with 12 wire. What size wire is needed for a 30 amp breaker RULES OF THUMB. Disconnect the black "hot" wire or wires from the terminal screws, taking care to note which one goes where (mark one with a piece of masking tape of you are worried about becoming confused).įit the wires into the same position on the new 30 amp circuit breaker, then tighten the terminal screws until they hold the wires firmly. Pop the existing circuit breaker free from its position, or unscrew it if it is an older model. The multimeter shouldn't show any electricity flowing through the breaker. Touch the other end to the grounding screw-usually set in a vertical bar on the far end of the circuit box. Set a multimeter to "Volts AC." Touch one end to the terminal screw of the old breaker.
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