RICK NAPIER
Senior Member
- Location
- New Jersey
Does anyon know of a product to repair 3/4" RMC damaged underground?
How about using the concrete-rated fittings, encasing them in a little concrete, and then backfilling? Or if they are not too deep, stick a sonotube around them, backfill, and pour concrete around them monolithic with the slab repair?I have since found on line some fittings that are rated for concrete but none for direct burial.
You can tell them they are not allowed to use it as is though - fix it properly or abandon it in place.So would I but I can't make them replace the existing burried conduit.
They wouldn't work since they cannot remove the conductors. This is what I found from 2 different manufacturors.
http://www.cooperindustries.com/con...mbinationcouplingsforrigidimcconduitfitt.html
How about using the concrete-rated fittings, encasing them in a little concrete, and then backfilling? Or if they are not too deep, stick a sonotube around them, backfill, and pour concrete around them monolithic with the slab repair?
Cheers, Wayne
It's just the fittings that disenegrated.
They wouldn't work since they cannot remove the conductors. This is what I found from 2 different manufacturors.
http://www.cooperindustries.com/con...mbinationcouplingsforrigidimcconduitfitt.html
It's just the fittings that disenegrated.
I will just say yes it would work, but still would not be a NEC compliant install, plus the risk of overheating conductor insulation during the welding process. If not going to be NEC compliant anyway I'd stay away from welding it, some kind of saddle clamp would be better IMO.As in basically gone? Something needs to be installed to replace the two couplings.
Just a suggestion, (and yes it would void the Listing), is to take 2 heavy wall 3/4" rigid couplings and cut them in half lengthwise.
Wire brush the threads of the ends of the RMC conduits to clean as much rust as possible from the threaded ends of conduits. (I assume there is not any cut unthreaded bald ends.
Sandwich the two halves of the cut coupling over the threads of the two ends of the conduit. Temporarily clamp the two halves of the coupling tightly together in place.
Use a small 120V Mig welder to tack weld the couplings in place. A good welder will alternate his spot welds around as to keep the heat to the two couplings low enough as to not heat the conductors inside the conduit. He can spot weld the cut sides of the couplings completely closed if you want.
Because the welder will grind away the galvanizing somewhat where he will be spot welding the haves of the couplings back together, use a cold galvanized coating spray paint product to recoat the couplings.
Example Of
The welder will clean the spot welded areas good before spraying the cold galvanizing coating.
To finish the repair, (depends on how far you want to go), to make the repairs somewhat water tight, just one option might to be use an approved epoxy product. Just a guess taping the couplings and conduit would be a waste of time because of the shape/condition of the outer surface of the RMC.
Overkill?