I have a customer wanting 240v receptacles for a cord and plug saw and air compressor. According to the code I should be using table 430.148 to determine my conductor ampacity and breaker sizes. Should I also size my GFI (since this is an outdoor application) receptacle along with these findings or is there a special application that I am not aware of? Thanks for any input!
cord and plug motors
- Thread starter betsy
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- Location
- Massachusetts
Re: cord and plug motors
If these appliances came with cord and plugs just match those, or use the name plate info that should be on these appliances.
The GFCI is a good idea but probably not required.
If these appliances came with cord and plugs just match those, or use the name plate info that should be on these appliances.
The GFCI is a good idea but probably not required.
Re: cord and plug motors
I guess my biggest concern was that the saw he is using is 10HP. I will have to find out what the nameplate amp reading is. I just didn't want to size it too small and have the breaker tripping. According to the NEC table it should require a 50 amp breaker...do they make a GFI that will handle that kind of load? Thanks again!
I guess my biggest concern was that the saw he is using is 10HP. I will have to find out what the nameplate amp reading is. I just didn't want to size it too small and have the breaker tripping. According to the NEC table it should require a 50 amp breaker...do they make a GFI that will handle that kind of load? Thanks again!
shocker3218
Senior Member
Re: cord and plug motors
The only difference between a GFI breaker and a standard breaker is the coils and trip mechanism associated with the GFI portion. The contacts, bimetal strips (used for overload protection) and other internal parts are exactly the same. No problem with it "handling the load". Have hooked up several hot tubs and other motors using GFI breakers to feed them with no problem whatsoever.
The only difference between a GFI breaker and a standard breaker is the coils and trip mechanism associated with the GFI portion. The contacts, bimetal strips (used for overload protection) and other internal parts are exactly the same. No problem with it "handling the load". Have hooked up several hot tubs and other motors using GFI breakers to feed them with no problem whatsoever.
electricman2
Senior Member
- Location
- North Carolina
- Occupation
- Retired Electrical Contractor
Re: cord and plug motors
Just match circuit ampacity to the plug that came on the appliance. For example if the plug is NEMA 6-30P, provide a 30A. receptacle and OCPD. The manufacturer has already figured what size circuit is needed and provided the correct plug.
Just match circuit ampacity to the plug that came on the appliance. For example if the plug is NEMA 6-30P, provide a 30A. receptacle and OCPD. The manufacturer has already figured what size circuit is needed and provided the correct plug.
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