On the other hand, a faulty double pole breaker will show a 120V reading If a single-pole breaker does not work properly, you will get a zero voltage reading on the multimeter. This means the double pole breaker is working properly. On the other hand, if you test a double pole breaker, you will get a reading between 220-250V. Also, this means the circuit breaker is working. The reading can go low or higher slightly. For instance, if you test a single-pole breaker, you will get a 120V. Depending on the circuit breaker you picked, you might get various voltages. Now you can check the voltage on the multimeter. You should not touch any of these screws with bare skin and always hold the multimeter from its insulation covers. Also, hold the black probe on the ground screw. Then, hold the red probe on the terminal screw of the circuit breaker. When using the multimeter, make sure not to use damaged or cracked probes because electricity can travel through the cracks and might electrocute you. Note: Above two steps will set up the multimeter to voltage mode.
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