GFI
- Thread starter jhc8796
- Start date
- Status
- Location
- Massachusetts
Re: GFI
As far as the NEC is concerned as many as you want, 1,10,100 GFCIs.
I have heard that some manufactures have limits but have never seen this myself.
As far as the NEC is concerned as many as you want, 1,10,100 GFCIs.
I have heard that some manufactures have limits but have never seen this myself.
Re: GFI
Jhc, is the question how many can you put on a 20 amp circuit, if so, follow Bobs info and go with as many as you want. (residential)
If the question is "how many can you put down stream of a GFCI device" why would you, the first one would guard the rest.
The answer would still be as many as you wanted as far as the NEC. If a manufacturer limited downstream devices, this limit would have to be adhered to per their instruction.
Roger
Jhc, is the question how many can you put on a 20 amp circuit, if so, follow Bobs info and go with as many as you want. (residential)
If the question is "how many can you put down stream of a GFCI device" why would you, the first one would guard the rest.
The answer would still be as many as you wanted as far as the NEC. If a manufacturer limited downstream devices, this limit would have to be adhered to per their instruction.
Roger
bphgravity
Senior Member
- Location
- Florida
Re: GFI
Yes, Bob is correct. The code soes not specify and maximum receptcles on a circuit, it just specifies the total load that can be seen on any one circuit.
It obviously would not be a good design to put more than just a few receptacles on any circuit, gfci protected or not.
Some GFCI receptacle manufacturers do specify maximum downline receptacles that should be placed on one circuit. Manufacturers directions must be followed per the NEC.
Yes, Bob is correct. The code soes not specify and maximum receptcles on a circuit, it just specifies the total load that can be seen on any one circuit.
It obviously would not be a good design to put more than just a few receptacles on any circuit, gfci protected or not.
Some GFCI receptacle manufacturers do specify maximum downline receptacles that should be placed on one circuit. Manufacturers directions must be followed per the NEC.
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Re: GFI
I go through this exercise to invite your attention to something I?ve seen many times in this forum: If ?someone says,? then ask them to state their source. Then you will have the ability to verify the source, and decide for yourself.
Do you mean that your foreman told you that more than one would violate the NEC? If so, your foreman was wrong (as others have already pointed out). Do you mean that your foreman told you that "only one" is standard industry practice? If so, your foreman was wrong (as others have already pointed out). Do you mean that your foreman told you it would violate local codes or local jurisdictional rules? If so, we can?t contradict that statement without seeing the local codes and rules. Do you mean that your foreman told you it would violate the contract requirements? If so, we can?t contradict that statement without seeing the contract. Do you mean that your foreman told you that his or her experience shows this installation to be in the best interests of the owner? If so, then I, at least, would tend to disagree with this assertion.
I go through this exercise to invite your attention to something I?ve seen many times in this forum: If ?someone says,? then ask them to state their source. Then you will have the ability to verify the source, and decide for yourself.
bphgravity
Senior Member
- Location
- Florida
Re: GFI
It could be local code, contract specifications, or simply company policy. Not the NEC though.
It could be local code, contract specifications, or simply company policy. Not the NEC though.
- Location
- Massachusetts
Re: GFI
Thanks guys, this must be a first, the four of us in agreement.
Bob
Thanks guys, this must be a first, the four of us in agreement.
Bob
- Location
- Massachusetts
Re: GFI
Sorry can't talk, gotta run ta da store and getme some lotto tickets..
Bob
Sorry can't talk, gotta run ta da store and getme some lotto tickets..
Bob
bphgravity
Senior Member
- Location
- Florida
Re: GFI
And we should expect you to split the winnings into four parts, right!!!
And we should expect you to split the winnings into four parts, right!!!
bowmanelectric
Member
Re: GFI
your not talking about having gfi devices downstream from one another......
only reason I ask is I just ran into a situation with a homeowner who was replacing old receptacles
(agree w/ foreman comment
your not talking about having gfi devices downstream from one another......
only reason I ask is I just ran into a situation with a homeowner who was replacing old receptacles
(agree w/ foreman comment
bill addiss
Senior Member
Re: GFI
jhc,
Here's something else to look at.
None of the components in an Electrical System is perfect. They all have a certain amount of inherrant 'leakage'. Manufacturing specs are such that the 'leakage' is kept below a certain level, but if you add enough 'leaky' items together you will, at some point, have enough to cause tripping of a GFCI.
So, a fine point, but there must be some practical limit to the quantity of components that can be downstream of a GFCI. But there are too many variables to put any numbers to it.
To echo the others, only one GFCI is needed for the circuit if everything is connected downstream.
Bill
jhc,
Here's something else to look at.
None of the components in an Electrical System is perfect. They all have a certain amount of inherrant 'leakage'. Manufacturing specs are such that the 'leakage' is kept below a certain level, but if you add enough 'leaky' items together you will, at some point, have enough to cause tripping of a GFCI.
So, a fine point, but there must be some practical limit to the quantity of components that can be downstream of a GFCI. But there are too many variables to put any numbers to it.
To echo the others, only one GFCI is needed for the circuit if everything is connected downstream.
Bill
pierre
Senior Member
- Location
- Westchester County, New York
Re: GFI
Hello Bill
In reference to the 'leakage'in GFCI circuits, I received a call the other day from a contractor who had installed a timeclock for a pool. It was tripping the GFCI, he went and purchased another and it tripped again. The timeclock was about 130 feet from the GFCI Breaker. I suggested he install the GFCI closer to the pool pump and he did. It worked fine. I learned about this on this forum. Thanks for making me look good!!!
Pierre
Hello Bill
In reference to the 'leakage'in GFCI circuits, I received a call the other day from a contractor who had installed a timeclock for a pool. It was tripping the GFCI, he went and purchased another and it tripped again. The timeclock was about 130 feet from the GFCI Breaker. I suggested he install the GFCI closer to the pool pump and he did. It worked fine. I learned about this on this forum. Thanks for making me look good!!!
Pierre
bill addiss
Senior Member
Re: GFI
pierre,
Yes, I've seen it happen with pool pumps on long extension cords too.
Bill
pierre,
Yes, I've seen it happen with pool pumps on long extension cords too.
Bill
ryan_618
Senior Member
- Location
- Salt Lake City, Utah
Re: GFI
What if your foreman is George Foreman? I wouldn't disagree Sorry I had to say that :roll:
[ June 24, 2003, 06:27 PM: Message edited by: ryan_618 ]
What if your foreman is George Foreman? I wouldn't disagree
Sorry I had to say that :roll:[ June 24, 2003, 06:27 PM: Message edited by: ryan_618 ]
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