Siemens Seimens Arc Fault Breaker Logo
Gisele Gervais Posted on Apr 21, 2013
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Installing arc fault interrupter with ground fault

Can a ground fault interrupter be used in a bathroom with a ground fault interrupter? How many circuits can be installed in a 15 amp arc fault interrupter?

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Gene Haynes

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  • Siemens Master 5,391 Answers
  • Posted on Apr 22, 2013
Gene Haynes
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Question is vague. Arc fault and ground fault are slightly different.

Are you installing arc fault breaker?
http://waterheatertimer.org/How-to-wire-GFCI.html#arc-fault
http://waterheatertimer.org/How-to-replace-circuit-breaker.html

Code says Maximum 12 boxes per circuit breaker.

Arc fault breaker and GFCI outlet in bathroom?
>>> do not connect this way.
Do not install 2 fault protections on same circuit.
Install the arc fault circuit breaker, and then remove bathroom GFCI, and replace with ordinary outlet, or switch-outlet.

How many outlets can be connected to a bathroom GFCI?
It depends on total boxes on circuit.
Count the boxes. Max 12 boxes per circuit breaker.

How many amps can be connected to 15 amp device?
15 x 80% = 12 amps
Electricians use 80% rule to calculate safe maximum
http://waterheatertimer.org/Color-codewire.html
http://waterheatertimer.org/See-inside-main-breaker-box.html

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1 Related Answer

Anonymous

  • 75 Answers
  • Posted on Oct 10, 2009

SOURCE: how to install arc fault circuit interrupter

connect the neutral from the circuit to the afci breaker, and run the neutral that came on the afci breaker to the neutral bar in the panel. Make sure that the neutral that you connect from the circuit to the afci breaker is the one that belongs to the circuit that you're protecting or the afci wont work.

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I presume that you are talking about a Ground Fault Circuit Interrupter. GFCI plug...

Eventually they just fail. Replace it, it is your safety that is on the line. Be sure that power is actually going to the plug. If there is another interrupter up stream that tripped, you can have the condition that you describe.

Turn off power before handling the plug. Also, look closely at which terminals you hook up to on the back of the plug. One set of connections is to allow for downstream socket protection, and not for power in. Some installations have one GFCI plug in one bathroom, and all other bathrooms are wired onto the downstream output terminals of the first plug. Kind of confusing for home owners, I think, when the circuit trips, now you have to go to OTHER bathrooms and check the outlet there... My preference is GFCI at the location where the user plugs in.
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Are there any heaters anywhere in the circuit for this breaker? (ie: bathroom fan w/light and heater) If yes, I would suspect and inspect them first. Also,any type breaker will trip more easily if the electrical connection screws on the breaker are not tight enough...check to make sure that's not the case.
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