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Good question, I have 3 in a circut, 2 at 120V, and one at 14V. Already replaced the outlet thinking that was bad, same result. More than likely there are defective connections somewhere in the wiring. Possibly under a wire nut. It could be all or none of the above. All depends where you put your volt meter to do the reading. With the light switch in the off position when you measure across the switch you will get line voltage of 120 volt, but when you turn on the light, it will read the voltage drop of the switch, should be 0 volts unless the connection is bad or if it is a dimmer switch then the voltage will be all over the place. from: bmetong

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βˆ™ 2006-04-13 09:51:59
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Q: Why would one light switch show only 60V while all other switches in the circuit are showing 120V?
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A switch in a circuit will quickly allow you to break the circuit, without changing the wiring. For example, a light switch. By turning a light switch off, you are breaking the circuit and, thus, turning the light off.

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