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I am installing a doorbell transformer for a new Ring doorbell and I have an outlet right next to the main box. It would be simple for me to take the existing wiring, branch it and use it for the new transformer (which I could attach to the side of this junction). That would save me from having to run any more wire - simply take the wiring provided as part of the transformer and splice it to the existing run. Is there any reason that this is not a valid setup before I go about doing it?

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  • There are transformers that can attach directly to the knock out in the side of your box - is that what you're talking about? Side note, that exposed romex/NM cable isn't to code. – JPhi1618 Dec 4 '19 at 21:19
  • @JPhi1618 Yes - and what exposed romex? – Justin Pihony Dec 4 '19 at 21:25
  • The white wire coming out of the top of that disassembled box. Unless it's behind a finished wall (it's not because we can see it), it should be in conduit. Not a huge deal, but it's a sign to watch out for other work that might not be exactly up to code. – JPhi1618 Dec 4 '19 at 21:27
  • Ahh, yah. No, this is all behind an access panel. The plug in this case is there merely for a septic tank alert system. Otherwise this is all enclosed. Thanks for the note of course :) – Justin Pihony Dec 4 '19 at 23:16
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That should be fine, it looks like that's just a general purpose receptacle and it's OK to add a small load like a doorbell transformer to that circuit. It looks like there's room in the box, and clearance so the transformer will fit.

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    Might be easier to use a plug in style, like a PWS-1640, $15 on Amazon. – NoSparksPlease Dec 4 '19 at 21:42
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Yes, that's fine. Fit it in the open/missing knockout hole, that way you don't have to plug that hole.

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