Can you use a standard nema 3r j-box screw cover no gasket (for pulling purposes only no splicing) in a Class 1 Div 2 area if you have seal-offs installed at the panel it originates from? Thanks MGE
Seals are not the issue; the box may be used in Class I, Division 2 regardless of splices. [See 501.10.(B)(4)] What is generally overlooked in this application is grounding and bonding. The basic rules are the same for both Division 1 & 2. [See 501.130]