Paul the BIG Finn
Member
- Location
- Ashburn, VA
The owner has selected a 3+1 wiring package for the systems furniture. The systems furniture has an internal wiring harness with 3 circuits sharing a neutral and ground wire PLUS a separate power circuit with a dedicated neutral and dedicated ground for that circuit. The concept is for the dedicated circuit to be powered from a UPS and serve critical loads with the other three circuits supplied from a standard panelboard to serve the non critical loads.
The electrician is balking at installing the system citing NEC 210.4's requirement that "All conductors of a multiwire branch circuit shall originate from the same panelboard or similiar distribution equipment." NEC 210.4(B) further requires all multiwire branch wiring must be disconnected from a single point.
As I interpret the code we have one multiwire branch circuit and a single separate circuit powering the workstations. The electrician says that since they are connected to the same "whip" which then plus into the workstation it is a single multiwire circuit and all of the circuits must be disconnected together and be supplied from the same panelboard.
What is the board's opinion?
The electrician is balking at installing the system citing NEC 210.4's requirement that "All conductors of a multiwire branch circuit shall originate from the same panelboard or similiar distribution equipment." NEC 210.4(B) further requires all multiwire branch wiring must be disconnected from a single point.
As I interpret the code we have one multiwire branch circuit and a single separate circuit powering the workstations. The electrician says that since they are connected to the same "whip" which then plus into the workstation it is a single multiwire circuit and all of the circuits must be disconnected together and be supplied from the same panelboard.
What is the board's opinion?