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I am trying to wire an electrical panel in a standard manner.

I have several automation devices that take 120 Vac power. In order to protect them, I have purchased a 2-pole circuit breaker, Phoenix Contact TMC 72B 10A. I am now trying to wire it to an outlet. I plan to put the breaker on L and N of the 120 Vac source.

The circuit breaker's schematic is shown in the below image. Pins 1 + 3 connect to an X, pins 2 + 4 connect to what looks like a SPST switch.

Questions

  • What do the X's mean?
  • Where should I put power inlet? On pins 1 + 3, or pins 2 + 4?

Any additional advice is welcome, I am looking to comply with industry standards. Thank you in advance for your help!

TMC 72B 10A Top Image

Intrastellar Explorer
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    This question needs to go to the https://diy.stackexchange.com, or an industrial stackexchange, if there is such a thing. This is the electronics engineering stackexchange, which means we (mostly) work with itty bitty clean things. Industrial wiring is a great big dirty thing, and while we know the principles, most of us don't have experience with the practicalities (although a very few of us do). – TimWescott Sep 03 '19 at 16:27
  • " I am looking to comply with industry standards" Where I live, you can only comply with industry standards if you have a certificate to wire electrical panels. – Oldfart Sep 03 '19 at 16:28
  • The 'X'-looking marks are the circuit breakers. – TimWescott Sep 03 '19 at 16:29
  • @Oldfart if it were a home automation project then in some jurisdictions in the US the homeowner could do the work -- but they'd need to get it inspected (and likely critiqued) if they wanted to be legal. – TimWescott Sep 03 '19 at 16:30
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    'IN' is at the 'Top' of the breaker, on the terminals marked '1' & '3'. – brhans Sep 03 '19 at 16:36
  • @brhans thank you for answering my question, any chance you could just explain why 1 and 3 are the inlet vs the bottom? – Intrastellar Explorer Sep 03 '19 at 16:50
  • @C.Lange thank you for pointing out that answer, I found the answer there quite useful! – Intrastellar Explorer Sep 03 '19 at 16:51
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    All of the 'standard' DIN-rail breakers I've ever seen have 'IN' at the 'Top' of the breaker. There are very few with 'IN' at the 'Bottom', and these are intended for very specific purposes. – brhans Sep 03 '19 at 16:51
  • @TimWescott yeah sorry about wrong space, sometimes lines are blurred for me – Intrastellar Explorer Sep 03 '19 at 16:52
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    Generally, simple breakers like this can be back-fed with no trouble. This is AC power, after all, and it's not doing anything special like GFCI. So it doesn't matter. Supply hot+neutral can go to 1+3, or 2+4, your call. – Harper - Reinstate Monica Sep 03 '19 at 23:56

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