winslowfam
Senior Member
- Location
- VA
Hi...we are designing a replacement switchboard (480 volts) to be located in a room that has a PLC cabinet (120 volts) mounted on the wall across the room. NEC 110.26(A)(1) calls for 4 feet of clearance between the two panels. But, I believe there is an exception for a situation like mine that allows for smaller clearances if the work involves a retrofit...putting a new switchboard in the same place as the old one. Could someone point me to that exception in the code? I think it was added to the 2002 edition?