(or the electrician also could, obviously, and they're experienced at fishing wires through finished walls without wrecking drywall). ![]() You use thermostat cable to take the 24V wherever you need to go. Alternately, she can fit one of these boxes at an appropriate location, and then use listed wiring methods compliant with the Electrical Code to bring 120V mains power to the box.Īt that point, the electrician splices the transformer's 2 wires to mains power hardwired, fits the transformer as the box lid, tightens it down, and leaves. Now, if your basement is unfinished, there's likely to be one of these junction boxes somewhere, with handy circuits behind it your electrician can tap. The non-hazardous low voltage terminals are to be on the outside of the box. Code requires it be mounted with the AC power (black and white) wires on the inside, where they will splice to AC power wires also inside. As you can see, your transformer is made to be the lid of this. They're so common Amazon doesn't practically sell them, since every hardware store and electrical supply stocks them for about a dollar. ![]() Enter products like yours, which are designed to mount on standard 120/240V steel junction boxes, common as dirt in 120V wiring methods: However for thermostat wiring, the above is a silly product, because generally speaking thermostat wiring is a permanent part of the building, and there'd be no reason to make it pluggable, and a lot of reason not to. You're running smack into that right now. ![]() In mains electrical, wiring methods are everything.
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