Bill, The UL white book says: "In general, galvanized steel EMT in contact with soil requires supplementary corrosion protection." The utility in this area does not permit EMT for services. Most are PVC with some rigid and a very few IMC. Don(resqcapt19)
Re: EMT for Underground Services#1592 05/17/0109:12 AM05/17/0109:12 AM
Here in miami, when its underground, we use (for most residential services)a 2" Rigid down pipe (it has to go down 2 feet) the cable in the down pipe is either direct burial triplex, or its sheathed in 2" sch. 40 PVC back to the pole. in some places i have seen that 2" rigid pipe rust pretty badly.. thats what you get for having a water table 6-8 feel below the ground
Remember when you read my posts, im only 17, still learning... "Hey, its takes what it takes!"
Re: EMT for Underground Services#1593 05/17/0110:58 AM05/17/0110:58 AM
Here in NC I have seen that a time or too. In this field there is never a dull moment,and just when you think you have seen it all bam here we go again. Even though we try to do our best at the time of installation. There are always beter materials and methodology being developed all the time. It's always interesting to see these types of situlation. It gives us a better insight of what we all can or may encounter in our field.
Re: EMT for Underground Services#1594 05/17/0101:53 PM05/17/0101:53 PM
I hate to say it, but here in the Mountain State, if it had a circular cross section, it was used as a raceway. I've had to turn down a few re-connects because of EMT being used. EMT was never approved here in WV for contact with the earth, but, since no one ever said "nope" for a long time, it was used.
Few things are harder to put up with than the annoyance of a good example.
Re: EMT for Underground Services#1598 05/17/0104:59 PM05/17/0104:59 PM
I'm guessing, but I think it was the early eighties when it was banned. The reason they banned it for service raceway was because people were only hand-tightening the EMT compression couplings and connectors. Guess they were too lazy to reach for their channel locks!
Re: EMT for Underground Services#1599 05/17/0105:22 PM05/17/0105:22 PM