Kitchen remodel. I’m running electrical under a slab foundation from a kitchen wall outlet to an island. I need the code-approved method. The circuit I’m adding on to is one of 3, 20-amp circuits for the kitchen outlets/appliances.
My plan is to run 12 ga wire (two conductor with insulated ground) through plastic conduit, 3 inches below the 4-inch slab, from the island up through the mud-sill of the wall to the outlet I’m running off of. The conduit will run up the wall and join the gangbox with the GFCI duplex recepticle. At the island end, the conduit will run up inside the cabinets to the outlet boxes. After inspection, backfill over conduit and add new concrete to fill void.
Do I need to use metal conduit below the slab?
Is 3 inches below the slab deep enough?
Do I need to use flexible metal conduit in the cabinets?
Any help is greatly appreciated.
Replies
Based on the NEC YMMV
"Do I
Based on the NEC YMMV
"Do I need to use metal conduit below the slab?"
No PVC will be OK
"Is 3 inches below the slab deep enough?"
Yes
"Do I need to use flexible metal conduit in the cabinets?"
You might be able to use use ENT (Smurf Tube), PVC conduit or MC cable. They will usually say Romex is not enough. "Sobject to Physical Damage" is the call of the AHJ. You really need a local ruling. If they say it is subject to physical damage, FMC is not enough either.
running electrical under slab
Thanks Greg!!