Class 1 Box in a non classified location

[SixxGunzz]

If I install a Class 1 Div 1 box in a non classified location and my conduit runs through a class 1 div 2 location do I need to seal the box to meet class 1 div 1 requirements to keep the UL rating of the class 1 div 1 box?

 

[don_resqcapt19]

The box would not need a seal if it is not in a classified area. The conduit may require a seal at the classification boundary depending on where the boundary is and if any of the exceptions to 501.15(B)(2) apply to your installation.

 

[rbalex]

Since it isn't required to be explosionproof, it isn't required to be sealed; however, Type 7 enclosures are only rated for indoor locations so the enclosure must have additional rating(s) to be suitable for an outdoor location. In addition, you may need a boundary seal for the Division 2/unclassified boundary. See Section 501.15(B)(2).