- Location
- Windsor, CO NEC: 2017
- Occupation
- Service Manager
I am taking an electrical estimating class, and during discussion the instructor and I were talking about how a couple panels next to the MDP on the prints were going to be fed.
He said, "So the panel immediately beside the MDP will nipple to it, and the panel beside that panel will be fed from the MDP, 90'ing into the bottom of it, right?"
I said, "Well, I'd probably look into the feasibility of nippling all the panels together and passing Panel #2's feeder through Panel #1 for ease of installation and neatness."
"You can't do that."
"Au contraire! 312.8 states explicitly that I can!" I said with satisfaction.
"I've been down this road. It has to do with how the panel is listed. They make a panel that has a gutter built into the bottom of it, and if you were to do what you are thinking, you would have to buy that panel, which is outrageously expensive.."
He relayed a story from his past about a difficult inspector that insisted upon this, and also that he had seen the specs for this "gutter panel".
I promised him I would research this, because I don't believe it, and he would love to have proof otherwise.
I have reviewed the UL White Book, and see nothing in QUEY that would tell me that there is any such limitation in normal panelboards.
I was about to start researching in a couple catalogs and see if I could turn up whichever panel he had seen before, and see if there was some stated purpose in this gutter-in-a-panel that was missed.
Anybody ever heard anything like this before?
He said, "So the panel immediately beside the MDP will nipple to it, and the panel beside that panel will be fed from the MDP, 90'ing into the bottom of it, right?"
I said, "Well, I'd probably look into the feasibility of nippling all the panels together and passing Panel #2's feeder through Panel #1 for ease of installation and neatness."
"You can't do that."
"Au contraire! 312.8 states explicitly that I can!" I said with satisfaction.
"I've been down this road. It has to do with how the panel is listed. They make a panel that has a gutter built into the bottom of it, and if you were to do what you are thinking, you would have to buy that panel, which is outrageously expensive.."
He relayed a story from his past about a difficult inspector that insisted upon this, and also that he had seen the specs for this "gutter panel".
I promised him I would research this, because I don't believe it, and he would love to have proof otherwise.
I have reviewed the UL White Book, and see nothing in QUEY that would tell me that there is any such limitation in normal panelboards.
I was about to start researching in a couple catalogs and see if I could turn up whichever panel he had seen before, and see if there was some stated purpose in this gutter-in-a-panel that was missed.
Anybody ever heard anything like this before?