|
|
|
1 members (Scott35),
225
guests, and
10
robots. |
|
Key:
Admin,
Global Mod,
Mod
|
|
|
|
Joined: Mar 2005
Posts: 1,213
Member
|
Maybe it's just a hang-up I have with the way some of the codes are worded, and a tendancy I have for trying to apply logic to a legal document. If I have a room that shares a common wall, it's treated one way, but if I double that wall up for extra fire safety and move it 12" away, all the sudden NEC wants me to treat it completely differently, which I think is BS- a room is a room whether it's sharing a wall or 30' away and should be treated the same way. I see outbuildings as merely extra rooms associated with the primary dwelling, maybe I'm wrong- as noted, this is not exactly my realm of expertise... But I see the shop as a dwelling sub-unit ("living") and see no logical reason it should be treated any different than a dwelling unit.
[This message has been edited by SteveFehr (edited 02-22-2007).]
|
|
|
|
|
Joined: Jul 2004
Posts: 9,930 Likes: 34
Member
|
Steve, it all has to do with diversity of the load. In a dwelling unit we put a lot of things in the load calculation that will not usually be going at the same time. Certainly with a house full of people on Thanksgiving with someone in the shower, washer/dryer going, every light in the house on and the stove/oven going on all burners that 310.15(B)(2) table is probably not going to be "enough" but most times it reflects the actual diversity a dwelling will have.
In the case of your garage/shop, you have usually overbuilt but the answer is just to protect your feeder with 310.16. If you are tripping that you probably underbuilt the feeder.
Greg Fretwell
|
|
|
|
|
Joined: Feb 2001
Posts: 308
Member
|
Tom, you said the panel agrees it is only for feeders carrying 100% of the dwellings diversified loads. So what about a circuit to the garage? If you have a detached garage (with electric) the table won't apply?
I was thinking when you said shop, that maybe you meant a business of some sort. Of course if you are making kitchen cabinets in your garage and selling them, it is a business, right? Of course if you give the cabinets away then it's just a hobby.
I'll have to make sure our zoning officer checks the wiring before approving home based businesses.
|
|
|
|
Posts: 2,723
Joined: October 2000
|
|
|
|
|
|
