If it can get hit with a car,truck,or tractor,I like rmc. Sometimes a residential service will wind up on the drive-in end of the garage. I always use rmc on these for the stubdown on an ug service,pricey,but then if a car hits it,I've done all I can do.
#40015 - 07/10/0411:58 PMRe: PVC.....Tough as Steel?
Bob, I lost a job a few years ago by suggesting the use of rigid pipe on the ug in front of a garage, the owner told me i was a jack a$$, the other EC told him there was nothing wrong with using PVC, and that i was an old time electrician that din't know any other way of doing the job. This past march his wife came home from the local lemon aid stand at 2:00AM and drove into the PVC, his neighbor told me they heard a loud thud, and there was a bright flash, and then, they lost power. Bob, i suggested not only using rigid, but also installing a curb or post.
#40016 - 07/11/0406:24 AMRe: PVC.....Tough as Steel?
If a car runs into RMC and the surface behind is solid(like a pole) theres a good chance the RMC is squished. With PVC its definetely broken. In the winter up here you could kick PVC and have it break when its really cold.
#40017 - 07/11/0409:12 AMRe: PVC.....Tough as Steel?
The reality is that one cannot prevent accidents, and keeping damage from something like cars and trucks will take more than RMC. GA.Sparky said it right, common sense generally prevails - when there is common sense .
#40019 - 07/11/0409:47 AMRe: PVC.....Tough as Steel?
Another option is to cover the section of PVC subject to damage with steel "U" guard. I always recommend this on pole risers and sometimes the utility will comply. This can be a less expensive and easier to install alternative to RMC but unfortunately supply houses do not carry the stuff.
We wired a combination tractor shed/workshop on a farm a few years ago. We used Rmc for the stub down for the ug service. Last year,the owner whacked the rigid pretty good with a bush hog as he was turning the tractor. It dented the rigid,but no real harm. I believe it would have been bad news with even shed 80 pvc.
#40022 - 07/11/0401:42 PMRe: PVC.....Tough as Steel?
The deck area would most likley give the PVC additional protection, however, in a driveway area PVC or RMC should have additional protection, as Hal, noted the installation of a gutter, if you can find one is good. I like to use a guard post or curb in front of the pipe, yes this does increase the cost of the job, but at least suggest the additional protection, and let them refuse it. Most of the time, we forget to look at other hazards that may exist.