ECN Forum Forums General Topics of the Trade General Discussion Area cold room wiring method

If they are enforcing Class 1 Div 2 you will still need seal offs on the outside and RMC/IMC on the inside. I would ask the AHJ how they want to deal with the penetrations.

I agree that i need seal offs and IMC or RMC inside but if i do conduit on the outside i am eliminating about 90% of the rigid conduit.

I will check with AHJ on sealing requirements.

Thanks all for your replies.

Spray foam.

I bet if you mudded in the pipe with S mortar you could foam in the inside.

Be sure to verify if the putty or caulk you are using is foam friendly.