Quote:
Originally Posted by Matt L
Looks good. Make sure that the transformer and relay are UL listed (not that it helps a lot, but some). You could put a fuse in the 24V line, rated between the transformer output current and the relay coil current requirement. Other than that, the fuse on the 110V line that you have should be sufficient.
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Might not be a bad idea. All the HVAC equipment I've ever dealt with has been is fuse protected at the thermostat control transformer.