Explosion proof in Class II Division II

[RKAEI]

I'm working on a design for a Class II Division II location where a mobile oven is connected.

The corded plug for this oven is a normal NEMA 5-20R.

From what I've found in my Appleton catalog, there is no explosion proof receptacle that can accomodate a regular NEMA configuration. (Unless I'm missing something)

Can an appropriate plug be fitted to the oven without affecting it's UL listing? (explosion proof plugs can be had from Appleton).

Can anybody point me in the right direction?

 

[davidbeach]

It would seem that if the oven were suitable for use in a Class 2 Div 2 area that the manufacturer would provide various options for plugging it in or hard wiring it.

 

[RKAEI]

Interestingly enough, the material being dried in the oven reacts with air....really, a spark would never get to it. But because of the type of material, the classification is there.

 

[Electic]

Your application is similar to furnaces at a refinery, where the area classification extends right into the open flame. That might be for times when the equipment is turned off or not operating, I don't really interpret the rules just follow them.

I agree with earlier post that the cord could be hardwired, or sent with an appropriate connection, or......extend the cord to a receptacle beyond the hazardous area classification (if long enough or goes thru a seal fitting). Flexible cords are allowd in classified hazardous areas under special conditions (i.e.: for a lift pump)