GFCI follow up question

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And I think that the receptacles have to be labeled
"GFCI Protected No equipment ground"
 
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480sparky said:
As long as any grounds that are present are not hooked up. 406.3(D)(3)(c)
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Hold on there-- If the first half of the circuit has an EG and the second half does not then you can keep the EG connected to the first half.. Not sure why anyone would do that other than no room in the box but i wanted to be clear.

Once you get to the ungrounded section than you cannot hook up any EGC that is not connected thru to a panel. The ones that have no EGC must be marked.
 
Dennis Alwon said:
Hold on there-- If the first half of the circuit has an EG and the second half does not then you can keep the EG connected to the first half.. Not sure why anyone would do that other than no room in the box but i wanted to be clear.

Once you get to the ungrounded section than you cannot hook up any EGC that is not connected thru to a panel. The ones that have no EGC must be marked.
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I read the last sentence of 406.3(D)(3)(c) as saying you do not hook up any grounds.
 
480sparky said:
I read the last sentence of 406.3(D)(3)(c) as saying you do not hook up any grounds.
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I believe that is saying if one installs the 3 wire receptacles where there is no EGC then you cannot run an EGC between the receptacles. THis is to make sure someone later does not think there is a ground. IMO.
 
Dennis Alwon said:
I believe that is saying if one installs the 3 wire receptacles where there is no EGC then you cannot run an EGC between the receptacles. THis is to make sure someone later does not think there is a ground. IMO.
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So suppose the first half of the circuit is ungrounded, and the second half has a ground present, but is not grounded?

I would think that is a better possibility than the first half with a ground, but further down does not.
 
480sparky said:
So suppose the first half of the circuit is ungrounded, and the second half has a ground present, but is not grounded?

I would think that is a better possibility than the first half with a ground, but further down does not.
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Then I agree you cannot hook up the grounds and they must be marked. I have seen both situation. New circuit that ties to an old circuit and new wiring added to an old non grounded circuit.

Why would you not want to connect the EGC if it is a legitimate one. Obviously we do it all the time when an new circuit feeds a room then continues on to pick up an old circuit. If the GFCI is present at the panel then those receptacles that have valid EGC would get connected and those downstream would not.

Maybe I am misunderstanding-- I apologize if that is the case.
 
Dennis Alwon said:
Then I agree you cannot hook up the grounds and they must be marked. I have seen both situation. New circuit that ties to an old circuit and new wiring added to an old non grounded circuit.

Why would you not want to connect the EGC if it is a legitimate one. Obviously we do it all the time when an new circuit feeds a room then continues on to pick up an old circuit. If the GFCI is present at the panel then those receptacles that have valid EGC would get connected and those downstream would not.

Maybe I am misunderstanding-- I apologize if that is the case.
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I guess you could hook up the ground, if it is indeed grounded. But I've never seen a situation where someone extended a grounded circuit with an ungounded wiring method.
 
480sparky said:
I guess you could hook up the ground, if it is indeed grounded. But I've never seen a situation where someone extended a grounded circuit with an ungounded wiring method.
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Suppose you put an addition on a house and the panel must get moved 30 feet or so to the new exterior wall. One would have to feed the old 2 wire circuits. Maybe before feeding that circuit you want to pick up 2 outdoor receptacles. Now you have a 3 wire circuit feeding the old 2 wire circuit. You put a GFCI in the panel to feed the old circuit in order to have the recep. in that room 3 pronged. No egc in the old circuit but definitely in the new.
 
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