Attach the blue jumper connector to the opposite corner and the brown jumper to the other corner to form an x across the switch. With both conductors carrying 120 volts there is an increased risk of injury or property damage.
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Types Of Electrical Switches In The Home
How to test a double pole switch. The switch wires do not need to be disconnected at this time. Turn off power to the switch at the circuit breaker. Shut off the power to the light switch circuit by switching off the appropriate breaker in your homes service panel breaker. A double throw switch connects an input terminal to one of two output terminals. Disconnect the wires from one of the 220 volt circuit breakers that is working correctly. For one thing both supply wires for this switch carry voltage.
Cap wires as needed. Double switch test and replacement for bath fan and light in a 1960 house duration. If the electrician identifies a bad breaker theyll replace it and to determine what led to its failure. Your time will be well spent double checking your work. Touch one prong to the terminal screw on the breaker and the other to the ground. Using a continuity tester on the terminals see if there is continuity when the switch is turned on.
Disconnect and remove the switch. Touch one prong to the terminal screw on the breaker and the other to the ground. Connect the disconnected wires from the tripping circuit breaker to the second circuit breaker. On a single pole breaker they will test to see if the meter reads 120 volts. When the switch is in one position the common terminal is connected to the a terminal so current flows from the common terminal to the a terminal but no. Thus a double pole switch has three terminals.
If there is no continuity the switch has failed and needs to be replaced. This switch doesnt use a neutral conductor. If you do youre in for a bit of a jolt. Attach the main blue terminal to one of the poles on the side attach the main brown termainl to the pole right next to it. Identify the switch type. One of the terminals is called the common terminal.
Likewise on the double pole breaker theyll test for a reading of 240 volts. Wiring a 20 amp 240 volt switch can be a confusing experience for the average homeowner used to working with standard 110 volt circuits. Sparky channel 6417 views. Make sure that there are no cross connections between the two poles. If you decide to use a voltage tester dont touch a bare wire or the neutral as youre testing. Shut off the power.
The other two terminals are often referred to as a and b. A low reading or zero indicates a bad breaker. This kind of mistake is easy to make and potentially very dangerous depending on the application. Unscrew the switch mounting screws and pull the switch out of the box enough to access the switch terminals. Connect the switch as you would with a simple switch handling each pole separately. This circuit breaker must be of the same or lower amperage as the circuit breaker that is tripping never greater.
Gallery of How To Test A Double Pole Switch
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