redshoerider
New User
- Location
- New Hampshire, USA
- Occupation
- Biologist
Good Evening, All:
I'm kind of stumped on this one. I think I'm in the clear, but want to ask before I give myself a huge headache.
Prior to the 2017 NEC, we had this:
312.8 Enclosures for Switches or Overcurrent Devices.
Enclosures for switches or overcurrent devices shall not be used as junction boxes, auxiliary gutters, or raceways for conductors feeding through or tapping off to other switches or overcurrent devices, unless adequate space for this purpose is provided. The conductors shall not fill the wiring space at any cross section to more than 40 percent of the cross-sectional area of the space, and the conductors, splices, and taps shall not fill the wiring space at any cross section to more than 75 percent of the cross-sectional area of that space.
As of the 2017, we have this:
312.8 Switch and Overcurrent Device Enclosures.
The wiring space within enclosures for switches and overcurrent devices shall be permitted for other wiring and equipment subject to limitations for specific equipment as provided in (A) and (B).
I have a whole-house transfer switch mounted next to the panelboard; the 1st overcurrent device is a 200A enclosure on the outside of the house, so everything inside is downstream of that. I'm adding a subpanel in the garage; the lay of the conduit works out far better if I come though the transfer switch enclosure with the wires rather than directly to the panelboard. Provided I give notice on the transfer switch enclosure that there is a circuit passing though, this passing-though would be allowable by code?
Thanks, all!
-Chris
I'm kind of stumped on this one. I think I'm in the clear, but want to ask before I give myself a huge headache.
Prior to the 2017 NEC, we had this:
312.8 Enclosures for Switches or Overcurrent Devices.
Enclosures for switches or overcurrent devices shall not be used as junction boxes, auxiliary gutters, or raceways for conductors feeding through or tapping off to other switches or overcurrent devices, unless adequate space for this purpose is provided. The conductors shall not fill the wiring space at any cross section to more than 40 percent of the cross-sectional area of the space, and the conductors, splices, and taps shall not fill the wiring space at any cross section to more than 75 percent of the cross-sectional area of that space.
As of the 2017, we have this:
312.8 Switch and Overcurrent Device Enclosures.
The wiring space within enclosures for switches and overcurrent devices shall be permitted for other wiring and equipment subject to limitations for specific equipment as provided in (A) and (B).
I have a whole-house transfer switch mounted next to the panelboard; the 1st overcurrent device is a 200A enclosure on the outside of the house, so everything inside is downstream of that. I'm adding a subpanel in the garage; the lay of the conduit works out far better if I come though the transfer switch enclosure with the wires rather than directly to the panelboard. Provided I give notice on the transfer switch enclosure that there is a circuit passing though, this passing-though would be allowable by code?
Thanks, all!
-Chris
