Originally Posted By: psmothers This post was automatically imported from our archived forum.
The overkill is the size of service that they upgraded to. Unless they have a small factory inside it would probably be considered by most as a little excessive.
Originally Posted By: Ryan Jackson This post was automatically imported from our archived forum.
Mike Parks wrote:
Ryan
PS This would not be allowed to supply 400 AMPS (on a residential application)
Thats what I am looking at. In a commercial you can put 400 amps on a 500KCMIL. I don't my book in front of me, but I'm pretty sure 310.15(B)(6) would allow 400 amps on a 350KCMIL in a residence. Looking at the conductors, they look smaller than that...
Also, as far as 400 amp dwelling services go, I inspect them every day in the city I work for. I also ask for load calculations when exception 3 to 230.90 is being used, and I have found that many times a 400 amp service is justified.
Originally Posted By: Brian A. Goodman This post was automatically imported from our archived forum.
Horrible, horrible work. 400 amps on a house that size, and butt-ugly too.
On a side note, remind me never to mention my wife in a post. I'm afraid Jeff P. will come right in behind me and post 3 big pictures of her in something lacy. That guy has pictures of everything. ![icon_mrgreen.gif](upload://tbe1CncrrOs48cXpHvziOT8r0T3.gif)
Originally Posted By: jpeck This post was automatically imported from our archived forum.
Mike Parks wrote:
90.8(A)
Since I do not know what this means ----- Any thoughts?
Mike P.
90.8 Wiring Planning.
(A) Future Expansion and Convenience. Plans and specifications that provide ample space in raceways, spare raceways, and additional spaces allow for future increases in the use of electricity. Distribution centers located in readily accessible locations provide convenience and safety of operation.
" Plans and specifications that provide ample space in raceways, spare raceways, and additional spaces
allow for future increases in the use of electricity" That part is self-explanatory when read that way. Provide spare raceways, extra space in raceways, and additional spaces in panelboards and it allows for future increases in use. Makes common sense. Unfortunately, that is a close to including common sense as much of the code gets, and that does not say "shall" be done, just that it 'will' if done.
"Distribution centers located in readily accessible locations
provide convenience and safety of operation." Again, common sense. Make it readily accessible and that provides "convenience and safety of operation".
Originally Posted By: roconnor This post was automatically imported from our archived forum.
A 400A residential service would need 400 kcmil Cu or 2 sets of 4/0 Cu … even larger for Al.
My guess would be work without a permit ... and a flag right there. Needs an evaluation, but apparent undersized feeders and utility service drop that wasn't upgraded (maybe cause the utility wasn't notified?) ... plus hack bugs.
Just a guess though ... ![icon_wink.gif](upload://ssT9V5t45yjlgXqiFRXL04eXtqw.gif)
-- Robert O'Connor, PE
Eagle Engineering ?
Eagle Eye Inspections ?
NACHI Education Committee
I am absolutely amazed sometimes by how much thought goes into doing things wrong