We have a lab which uses small environmental chambers to test circuit boards. A typcial supply for these chambers use 40amp receptacles which are run under a raised floor. Our maintenance guys also ran the 40psi water supply and drain lines under this floor as well. The receptacles are not sealed (intrinsically safe). Is GFCI protection required? Our maintenance manager says no. I think it is. Who is correct?
GFCI Required For Raised Floors?
- Thread starter Bftman
- Start date
- Status
- Location
- Lockport, IL
- Occupation
- Retired Electrical Engineer
Your maintenance manager is correct. Sorry. The GFCI rule appears in NEC article 210.8. It requires protection for 125 volt, 15 and 20 amp receptacles in specific locations. It does not require GFCI protection for 40 amp circuits.
That said, the questions of whether it would be safer to provide GFCI protection, or whether such protection is even available for a 40 amp circuit, are separate issues.
That said, the questions of whether it would be safer to provide GFCI protection, or whether such protection is even available for a 40 amp circuit, are separate issues.
Hendrix
Senior Member
- Location
- New England
Did he run flexable cord under the floor?
- Status