calicocal
Member
- Location
- Detroit, MI
I'm installing 12" Sonotubes with a plastic coating wrapped around the outside. I know that the note on NEC 250.52(3) says "Concrete installed with insulation, vapor barriers, films, or similar items separating the concrete from the earth is not considered to be in 'direct contact' with the earth." If the bottom of the Sonotube is not wrapped and is direct contact is that adequate for grounding even though the sides are?