Guys/Gals - I need some quick help here.
As some of you may know, I manage construction of new homes. Doing a custom now - Northern VA.
Late minute add - Customer wants to put a wood shop in his basement. He wants to install a 4" PVC pipe under the slab for dust collection, turned up to his table saw/planer location, with other end in the corner of the shop for the dust extractor. Also a conduit fed floor box for power. Station would be in essence a island with perhaps 25' under slab runs.
Ground the exterior of the PVC dust collection pipe which will be bedded in gravel below slab or not? If so, bare copper, what gage, rate of twist on pipe if any, etc? My thoughts is the conduit will be in the wet gravel which is common with the slab drainage system, so I am thinking the pipe will be naturally grounded. I've no problem wrapping this with copper and turning up the ground wires at each end thru the slab, can't hurt and only one chance to install it. Can also fish a fire thru the conduit later and tie common.
Run a separate ground rod in the corner of the shop or tie it into the house ground? I am thinking use single house ground.
I am thinking we also run a conduit so he can fish RapidAir air line thru to his island.
Groundworks start this Friday... Gotta love it when folks change the plan. Thanks for the help. I just want to pour the slabs but I want to make sure his basic plan is sound.