just a plain old garage sewage ejector pit

[gravy]

I have a question from an owner regarding whether our below grade ventilated garage will require explosion proof equipments and sealed threaded conduit fittings/connections for our sump and sewage ejector pits. I have not ever designed this way before....I have looked through the NEC 500 and not found anything specifically requiring a classification. Have I been endangering people for years?

 

[weressl]

I have a question from an owner regarding whether our below grade ventilated garage will require explosion proof equipments and sealed threaded conduit fittings/connections for our sump and sewage ejector pits. I have not ever designed this way before....I have looked through the NEC 500 and not found anything specifically requiring a classification. Have I been endangering people for years?

Need to read Artice 511.
..if it is adequately ventilated it can be considered a non-classified location.

The "adequate" ventillation has to meet certain citeria.

 

[gravy]

thanks for responding. This is not a commercial garage (no work on automobiles or transfer of fuels)...just a normal parking garage that is ventilated. after looking through a lot of the threads on this site, I am comfortable with design as a non-hazardous location for the pits.