Barjack
Member
- Location
- St. Petersburg, FL
I am wiring a doctor's office as a build out in a new space in an existing building. The office will be supplied from two nominal voltage systems (120/208Y for receptacles, X-ray, and other equipment, and 277/480Y for lighting, HVAC, and water heater). The panel room for this space is not located inside the space, but in another part of the building on the same floor. I am bringing the home runs into the panel room in 3/4" EMT, but due to the number of bends, I am putting a pull box just inside the panel room for the wires to pass through on their way to their respective panels. Conduits from both systems will be passing through the same box.
My questions are as follows:
1. 210.5(C) requires ungrounded conductors of different systems to be identified by phase or line and system at all termination, splice and connection points. A pull box does not require such identification, right?
2. Does marking the J-box covers inside the office by color, line and system count for identification? An example would be: H3(panel) Black-2, Red-4, Blue-6, White-N, 277/480Y.
3. Are there any other requirements for mixing conductors of different systems? All wire is THHN/THWN 600V, and the pull box is the only place where the two systems enter the same enclosure.
Thanks in advance.
-Chris
My questions are as follows:
1. 210.5(C) requires ungrounded conductors of different systems to be identified by phase or line and system at all termination, splice and connection points. A pull box does not require such identification, right?
2. Does marking the J-box covers inside the office by color, line and system count for identification? An example would be: H3(panel) Black-2, Red-4, Blue-6, White-N, 277/480Y.
3. Are there any other requirements for mixing conductors of different systems? All wire is THHN/THWN 600V, and the pull box is the only place where the two systems enter the same enclosure.
Thanks in advance.
-Chris