We are installing numerous 2 hp fans around a golf course. The fans are permanently mounted on 10' poles with starters located at the bottom of the pole. Each fan is 3 phase 480 volts. The local inspector is requiring a gfci for all of the motors/starters. I have looked in artcle 250 and 430 but could not find the requirement. Do I need Gfci protection? We're talking 144 of them. Help!
gfci for motors
- Thread starter jamest
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ryan_618
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- Salt Lake City, Utah
Re: gfci for motors
I could be wrong, but the only GFCI requirements I am aware of are 210.8 and 230.95. I don't see how either would apply, though.
I could be wrong, but the only GFCI requirements I am aware of are 210.8 and 230.95. I don't see how either would apply, though.
Re: gfci for motors
Lots of luck on this one. 480v, 3ph??? and I assume that the AHJ is referring to people protection with 5ma. There are devices that may be able to get down close to that but good luck with nuisance tripping problems. The device that I can think of off hand is a device consisting of a window CT where you run all 3 conductors through the window. When the device senses an imbalance of more than the sensor setting it closes a contact which in turn trips a shunt trip activated breaker
Lots of luck on this one. 480v, 3ph??? and I assume that the AHJ is referring to people protection with 5ma. There are devices that may be able to get down close to that but good luck with nuisance tripping problems. The device that I can think of off hand is a device consisting of a window CT where you run all 3 conductors through the window. When the device senses an imbalance of more than the sensor setting it closes a contact which in turn trips a shunt trip activated breaker
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