I want to mount lights on the brick wall either side of the garage door. I will run the individual conductors (THWN) in WireMold metallic raceway on the inside sheetrock wall to a box back-to-back with the light fittings. Do I need to transition then to sheathed cable to pass through the sheetrock and the brick, or can I continue with the THWN -- or do I need to use conduit?
Perce