Expansion Fittings

[T-minator]

Is it code to use a box to seal tight to box connection instead of an expansion fitting?

 

[Smart $]

Is it code to use a box to seal tight to box connection instead of an expansion fitting?

There's nothing in the Code which prohibits it.

 

[Nom Deplume]

I would use flex instead, unless it is in a wet location.

 

[infinity]

What is the application? If in a dry location then it would need to comply with the flexibility requirement.

350.10(1) Where conditions of installation, operation, or mainte-
nance require flexibility or protection from liquids, va-
pors, or solids