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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A circuit breaker cuts off an electrical circuit in building wiring any time that electrical current goes above a safe level. Its function is similar to a fuse, although circuit breakers can be used more than once. More »

To test a circuit breaker using a multimeter, remove the circuit breaker box cover and turn the switch on. Using the multimeter's red prong, touch the screw that connects to the breaker. Touch the grounded box using the ... More »

Troubleshoot a three-way switch by turning off the circuit breaker and using a continuity tester to check between the common terminal and each of the traveler terminals. If the switch is working correctly there is only c... More »

www.reference.com Home & Garden Home Maintenance Electrical

The load a circuit is to carry determines the appropriate size circuit breaker. For safety, the total circuit load should be 80 percent of the breaker's capacity. This allows for factors such as ambient temperature and i... More »

Some tips for wiring 240 volt outlets include obtaining the necessary permits, using a circuit breaker of 240 volts, using a deep and wide outlet box, connecting the ground wire, and grounding a metal outlet box. Also, u... More »

To wire a breaker box, attach the grounding wire to the metal bar with setscrews, remove 1/2 inch of insulation from the wires, insert them into the circuit breaker, and push on the circuit breaker to lock it into place.... More »