Jpflex
Electrician big leagues
- Location
- Victorville
- Occupation
- Electrician commercial and residential
The mining company I work for, purchased some trailers a while back to house employees during the week. I was assigned to supply these with typical 1 phase 129 volt power and get them in working order, including their heating systems.
One trailer, which was once used by Mrs Clio? For 5 mini changing rooms estimate 7’ x 4’ each for actors is now being used to house 5 employees “crammed”
I was not aware of trailer codes at the time but my first approach and install I found was closer to being code compliant
I added a 50 ampere single main 2 pole disconnect before the trailer’s two power distribution panels which previously had no upstream single disconnect but only contained numerous 20 ampere branch circuit breakers.
I removed the second feeder cord from the second distribution panel and tied the two branch circuit panels together to make one distribution branch circuit panel fed from my newly installed 50 ampere main disconnect panel and single cord fed from an outside 50 ampere sub panel
However, I decided later to undo this set up because I did not believe 50 amperes would suffice for 5 employees within this one trailer so I went back to the original set up by splitting/ separating the two trailer power distribution panels, removed the 50 ampere single main disconnect and reconnecting the second 50 ampere feeder cord (one for each trailer branch circuit panel ) which now split the rear trailer half by 50 amperes and the front half by its own 50 ampere supply (both having the same phase voltage)
After reading the code I found that trailers are limited to 50 amperes
This is at a mine sight not normally enforced by NEC but I typically conduct my work according to NEC to keep things safe and so I can get used to proper install habits
What are your thoughts?
One trailer, which was once used by Mrs Clio? For 5 mini changing rooms estimate 7’ x 4’ each for actors is now being used to house 5 employees “crammed”
I was not aware of trailer codes at the time but my first approach and install I found was closer to being code compliant
I added a 50 ampere single main 2 pole disconnect before the trailer’s two power distribution panels which previously had no upstream single disconnect but only contained numerous 20 ampere branch circuit breakers.
I removed the second feeder cord from the second distribution panel and tied the two branch circuit panels together to make one distribution branch circuit panel fed from my newly installed 50 ampere main disconnect panel and single cord fed from an outside 50 ampere sub panel
However, I decided later to undo this set up because I did not believe 50 amperes would suffice for 5 employees within this one trailer so I went back to the original set up by splitting/ separating the two trailer power distribution panels, removed the 50 ampere single main disconnect and reconnecting the second 50 ampere feeder cord (one for each trailer branch circuit panel ) which now split the rear trailer half by 50 amperes and the front half by its own 50 ampere supply (both having the same phase voltage)
After reading the code I found that trailers are limited to 50 amperes
This is at a mine sight not normally enforced by NEC but I typically conduct my work according to NEC to keep things safe and so I can get used to proper install habits
What are your thoughts?
