eljefetaco
Member
- Location
- Fanwood, NJ
wHICH ONE AND WHY. THOUGHT THE 6MA SOUNDS SAFER ANY PLACE I CAN LOOK. ARTICLE 680 DOESN'T SPECIFIY ENOUGH. THANKS.
Pool motor gfi 30ma or 6ma??
- Thread starter eljefetaco
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Class A GFCI
Class A GFCI
eljefetaco,
...my understanding...
When the NEC is referring to ANY GFCI device it is referring to a Class A device as defined in Article 100 for a ground-fault circuit interrupter, which has a trip range of 4 to 6 ma.
(...unless the NEC specifically refers to a GFCI of OTHER THAN Class A... which is not to be confused with GFPE or ground-fault protection of equipment...)
Some good information on GFCIs is also available in the 2008 UL White Book, which is a free download.
I do hope this is helpful
mweaver
Class A GFCI
eljefetaco,
...my understanding...
When the NEC is referring to ANY GFCI device it is referring to a Class A device as defined in Article 100 for a ground-fault circuit interrupter, which has a trip range of 4 to 6 ma.
(...unless the NEC specifically refers to a GFCI of OTHER THAN Class A... which is not to be confused with GFPE or ground-fault protection of equipment...)
Some good information on GFCIs is also available in the 2008 UL White Book, which is a free download.
I do hope this is helpful
mweaver
Last edited:
eljefetaco
Member
- Location
- Fanwood, NJ
If a 6ma is to portect life and limb why have a 30ma and whats the benifit of a dual protection gfci breaker, noth 6ma and 30ma?
6ma= Ground-Fault Circuit Interrupter (GFCI). A device intended for the protection of personnel that functions to de-energize a circuit or portion thereof within an established period of time when a current to ground exceeds the values established for a Class A device.
30ma=Ground-Fault Protection of Equipment. A system intended to provide protection of equipment from damaging line-to-ground fault currents by operating to cause a disconnecting means to open all ungrounded conductors of the faulted circuit. This protection is provided at current levels less than those required to protect conductors from damage through the operation of a supply circuit overcurrent device.
Roger
30ma=Ground-Fault Protection of Equipment. A system intended to provide protection of equipment from damaging line-to-ground fault currents by operating to cause a disconnecting means to open all ungrounded conductors of the faulted circuit. This protection is provided at current levels less than those required to protect conductors from damage through the operation of a supply circuit overcurrent device.
Roger
- Location
- Illinois
- Occupation
- retired electrician
I have never seen a dual protection ground fault device. The 30 mA is use for equipment like heat tapes that may have leakage that exceeds 5 mA. It is for the protection of things not people. The items that the code requires the 30 mA protection are things that can, under some conditions, produce enough heat to cause a fire without tripping a standard type breaker.
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