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Questions tagged [voltage]

The tag has no usage guidance.

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Why do I measure 12VAC on old thermostat wires?

I'm installing a nest thermostat in my house - it's the UK version with a heatlink. I have successfully wired the heat link into my combi-boiler, disconnecting two existing wires in the process. I ...
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No voltage after changing light switches

I turned the power off and replaced a few light switches... and when I turned the breaker back on, one of the switches on a circuit is not working. There are a few other switches on the same circuit ...