patriotelectric
Member
Can you share the neutral wire on a 3-wire home-run protected by 2 separate arc fault circuit breakers for two bedroom circuits? Might this cause nuisance tripping?
Arc fault circuit breakers
- Thread starter patriotelectric
- Start date
- Status
- Location
- Windsor, CO NEC: 2017
- Occupation
- Service Manager
Re: Arc fault circuit breakers
Yes, always and forever. Forget multiwire branch circuits on arc faults.
patriotelectric
Member
Re: Arc fault circuit breakers
Thanks for the prompt reply! I don't like to have to do things twice so I appreciate your input.
Thanks for the prompt reply! I don't like to have to do things twice so I appreciate your input.
luke warmwater
Senior Member
Re: Arc fault circuit breakers
Cutler Hammer makes a 2-pole AFCI made for Multi-wire circuts.
Cutler Hammer makes a 2-pole AFCI made for Multi-wire circuts.
- Location
- Windsor, CO NEC: 2017
- Occupation
- Service Manager
Re: Arc fault circuit breakers
...And I bet you it costs twice as much as two arc fault breakers? (Honest question.)
...And I bet you it costs twice as much as two arc fault breakers? (Honest question.)
bark
Member
- Location
- Washington
Re: Arc fault circuit breakers
I'm having trouble with a arc fault breaker. After checking the entire circuit, it still trips like a dead short. All grounds are separated from the nuetrals in all of the devices. I've managed to keep the circuit energized until it gets to the tail end where some keyless pullchain fixtures are. If I turn those fixtures on the breaker trips as if it were a dead short. Also, will a dimmer switch trip a arc fault? Thanks
I'm having trouble with a arc fault breaker. After checking the entire circuit, it still trips like a dead short. All grounds are separated from the nuetrals in all of the devices. I've managed to keep the circuit energized until it gets to the tail end where some keyless pullchain fixtures are. If I turn those fixtures on the breaker trips as if it were a dead short. Also, will a dimmer switch trip a arc fault? Thanks
- Location
- Windsor, CO NEC: 2017
- Occupation
- Service Manager
Re: Arc fault circuit breakers
You took the grounding clip out of the box on the keylesses, right?
Bad bulbs can do it.
As for dimmers, they could, but I haven't dealt with that problem myself.
You took the grounding clip out of the box on the keylesses, right?
Bad bulbs can do it.
As for dimmers, they could, but I haven't dealt with that problem myself.
luke warmwater
Senior Member
Re: Arc fault circuit breakers
Depending on who you are and where you buy them, the 2-pole could be less or more than twice as much as (2) single poles.
Commonly I would say 'yes'.Originally posted by georgestolz:
...And I bet you it costs twice as much as two arc fault breakers? (Honest question.)
Depending on who you are and where you buy them, the 2-pole could be less or more than twice as much as (2) single poles.
Re: Arc fault circuit breakers
A 2 pole ark fault seems like a great idea but may be a nightmare if you have nuisance tripping.
"Can you share the neutral wire on a 3-wire home-run protected by 2 separate arc fault circuit breakers for two bedroom circuits? Might this cause nuisance tripping? "
I would not call it nuisance tripping. It would be more instant tripping (once there is any load on the circuits).
Tom
A 2 pole ark fault seems like a great idea but may be a nightmare if you have nuisance tripping.
"Can you share the neutral wire on a 3-wire home-run protected by 2 separate arc fault circuit breakers for two bedroom circuits? Might this cause nuisance tripping? "
I would not call it nuisance tripping. It would be more instant tripping (once there is any load on the circuits).
Tom
al hildenbrand
Senior Member
- Location
- Minnesota
- Occupation
- Electrical Contractor, Electrical Consultant, Electrical Engineer
Re: Arc fault circuit breakers
There are very few choices for two pole AFCIs. If the installed panel is of different manufacture, a subpanel will have to be installed and the multiwire homerun that one wants to protect will have to be routed to it.
There are very few choices for two pole AFCIs. If the installed panel is of different manufacture, a subpanel will have to be installed and the multiwire homerun that one wants to protect will have to be routed to it.
- Status