I'm installing a spa disconnect for a hot tub that is strictly 230 volt operation so no need for a neutral. I see no reason to pull in a neutral conductor from the residential service panel for the pigtail on the GFCI 2 pole breaker and plan to terminate it on the ground bar with the separate equipment grounding conductor in the disconnect. Anybody see a violation here? Can't seem to find a concrete answer, even the inspector was scratching his head but has left it up to me to show it is ok. I'm up to the challenge but thought I would take a shortcut by asking if any of you fellas have already gone down this road. Thanks ron
GFCI breakers will monitor the current flow in all the conductors hooked up to them whether they are phase conductors or the white conductor. As soon as there is current flow exceeding 6ma. flowing someplace other than in those conductors connected to the breaker, the breaker will trip. Do not hook the white conductor to anything, unless it is needed by the load. No code reference other than maybe 110.3
Re: Hot tub disconnect#96435 11/29/0508:57 AM11/29/0508:57 AM
To the best of my knowledge the circuit board in the GFCI won't work if there isn't a neutral, since the circuit runs on 120V. It is the same part that the single pole breakers use. (To test it out, disconnect the white pigtail and press the test button...) I don't remember any code provision that allows the use of a GEC for a neutral, even if it is for .001 watt... Besides, what about future accessories to the tub that do require 120V service? IMHO, pull the white and there are no questions.
[This message has been edited by Mike Wescoatt (edited 11-29-2005).]
Re: Hot tub disconnect#96436 11/29/0510:04 AM11/29/0510:04 AM
Thanks for the replies fellas The problem is that this white pigtail is needed in the test mode of the breaker so just capping it wouldn't be practical. As 57 suggested, why not just run a neutral, is an easy way to be done with it but I am challenging my experiences and that of others to determine whether we really need to pull that neutral wire since the pigtail wouldn't be a current carrying conductor except possibly during a fault test. Although I will most likely just pull the neutral wire in to save on bickering time it would be nice to know, theory and code wise, whether it is necessary. The other point I was discussing with my apprentice this morning was the fact that the egc was terminated on the grounding bar in the spa disconnect so if I would terminate the "neutral" from the breaker at that point it could be said that now I've created a "service" point since the ground bar is bonded to the enclosure. Probably best to just pull the neutral in. Very fun discussion though. I will have to bring it up when together with others in the trade at the next convention. Thanks again for all the replies. Ron