How To Wire 240 Breaker

Inside the covering you ll find a copper wire the ground wire a white covered wire the neutral wire a black wire the hot wire and a red wire another hot wire.

How to wire 240 breaker. Two characteristics of 240 volt wiring are important when you re installing a new circuit breaker. A 120 volt circuit has only one hot wire connected to the breaker plus a neutral wire connected to the neutral bus bar in the service panel. To install a circuit breaker. The circuit wiring and the circuit breaker must be identified at the electrical panel.

A 3 wire 240 volt circuit has two hot wires each supplying 120 volts for a total of 240 and an equipment ground wire. The 240 volt circuit breaker of the circuit is turned off and the circuit wiring is removed from the circuit breaker. In this case where there is a 3wire circuit the black wire is used for the hot. In the sub panel box the neutral and ground wires will connect the same as they do in the main breaker box but the red and black wires will connect to the hot bar instead of a circuit breaker.

The second is that 240 volt circuits carry high amp current. In addition to 120 240 volt systems that appear in residences. In household wiring several appliances run on 240v power feeds from the breaker box. You can check that the power is off by using a voltage tester and testing both plugs.

Use wire strippers to bare 1 2 an inch of each conductor. Feed the wire powering the hot tub through one of the knockout holes into the gfci box. In the us 120 240 systems the type most often found in a residence or dwelling use a color code for wiring. This voltage is double that of standard household wiring and thus requires a special double pole breaker.

This breaker looks like two standard breakers stacked on top of each other and therefore requires that two breaker positions be open. Remove the outer insulation jacket from the wire. The first is that 240 volt wiring requires two hot wires not just one as 120 volt circuits do. Before installing a 240 volt receptacle shut off the main breaker.

Attach the white wire to the neutral bus bar and the ground wire to the grounding bar. That means you need heavy gauge wire to prevent overheating.