Siemens Plug on Neutral CAFCI and shared neutrals

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ransonjd

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Electrical Engineer
I note that the Siemens plug on neutral CAFCI breakers "now have a single load lug(s) only with the neutral lug removed. These breakers can be installed in the same manner as the thermal magnetic breakers." Given this, I would expect that they're insensitive to shared neutrals and faults where neutral wires are interconnected. Can anyone confirm this?
 
If you replace "faults" with "miswiring" I can confirm that your conclusion is correct based the information provided and first principles, without any specific knowledge of the product.

Cheers, Wayne
 
wwhitney said:
If you replace "faults" with "miswiring" I can confirm that your conclusion is correct based the information provided and first principles, without any specific knowledge of the product.

Cheers, Wayne
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Actually should probably say low level currents faults as well as certain miswiring situations.

High level current faults should still trip the magnetic trip function.
 
It's not just miswiring. It's homeowner wiring combined with homeowner plumbing. The loadcenter has to be replaced because the plumbing joints overhead are leaking. 🤦‍♂️ (Yeah, it's my newly acquired house. I'm a licensed electrical engineer, outside my normal element, writing up an RFQ for electricians.)
 
ransonjd said:
It's not just miswiring.
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I was just suggesting that interconnected neutrals from different circuits is something I would consider miswiring (a purposeful but incorrect connection) vs a fault (an unintentional connection). Not sure if that's the correct terminological distinction.

Cheers, Wayne
 
ptonsparky said:
Leaking plumbing above the Service Entrance? Sounds like inadequate inspection. Plumbing and possibly electrical.
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I am 100% certain that the kitchen was plumbed by the previous homeowner without inspection. (No vent, illegal trap, siphoning connection on the dishwasher, obvious leaks....) It all has to go.
The modern electrical work at the service entrance seems to have been done professionally, but the wiring in the walls is fully of trouble, like missing ground connections, regular outlets in wet areas, and similar. It all also has to go, but I'm hoping to do it in phases, starting with replacing the load center and modernizing to arc fault breakers.
 
ransonjd said:
I am 100% certain that the kitchen was plumbed by the previous homeowner without inspection. (No vent, illegal trap, siphoning connection on the dishwasher, obvious leaks....) It all has to go.
The modern electrical work at the service entrance seems to have been done professionally, but the wiring in the walls is fully of trouble, like missing ground connections, regular outlets in wet areas, and similar. It all also has to go, but I'm hoping to do it in phases, starting with replacing the load center and modernizing to arc fault breakers.
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Are the "wet areas" only outside or are you calling standard kitchen and bathroom receptacles "wet" I've seen some engineers think bathrooms need an inuse cover but use regular switches.
 
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