Jpflex
Electrician big leagues
- Location
- Victorville
- Occupation
- Electrician commercial and residential
A while back I was asked to wire up a trailer that was once used as a changing room for actors under “Mrs Cleo.”
The trailer has 5 changing rooms converted to living spaces with a whopping 7 feet x 3 feet space each section to be used to house future employees.
The trailer originally had 2 feeder cords going into the trailer from the bottom chassis. The two feeders fed two separate breaker panels each without a main disconnect. Each breaker panel had only several 20 ampere branch circuit breakers for the interior loads
Before I looked into the NEC code regarding RVs and trailers, my first installation approach I found later to be more inline with NEC requirements.
My first approach from the outside 50 ampere single phase 120 volt sub panel, was to install within the trailer, a small single main 50 ampere inverse breaker panel prior to feeding the 2 branch circuit breaker panels which I connected together as one. I also removed the second cord feeding the second branch circuit panel since the two branch circuit panels now functioned as one panel (spiced 1 feeder to supply each panel’s phase buss.)
later I didn’t feel that 50 amperes was going to be enough for 5 people so I undid my installation and went back to the original wiring without a main disconnect and with two feeders each supplied from a separate 50 ampere cord to feed each branch circuit panel for a total of 100 amperes split between half of the trailer (using the sane phase voltage)
After reading the NEC, I found that trailers are limited to 1 cord and at 50 amperes max. Also it no longer has a main power disconnect. What are your guys thoughts.
I wrote this scenario before but apparently it never posted so I’m doing it again
The trailer has 5 changing rooms converted to living spaces with a whopping 7 feet x 3 feet space each section to be used to house future employees.
The trailer originally had 2 feeder cords going into the trailer from the bottom chassis. The two feeders fed two separate breaker panels each without a main disconnect. Each breaker panel had only several 20 ampere branch circuit breakers for the interior loads
Before I looked into the NEC code regarding RVs and trailers, my first installation approach I found later to be more inline with NEC requirements.
My first approach from the outside 50 ampere single phase 120 volt sub panel, was to install within the trailer, a small single main 50 ampere inverse breaker panel prior to feeding the 2 branch circuit breaker panels which I connected together as one. I also removed the second cord feeding the second branch circuit panel since the two branch circuit panels now functioned as one panel (spiced 1 feeder to supply each panel’s phase buss.)
later I didn’t feel that 50 amperes was going to be enough for 5 people so I undid my installation and went back to the original wiring without a main disconnect and with two feeders each supplied from a separate 50 ampere cord to feed each branch circuit panel for a total of 100 amperes split between half of the trailer (using the sane phase voltage)
After reading the NEC, I found that trailers are limited to 1 cord and at 50 amperes max. Also it no longer has a main power disconnect. What are your guys thoughts.
I wrote this scenario before but apparently it never posted so I’m doing it again
