What do you mean by string them together? If it is portable then the NEC does not get involved but if this is a listed fixture and does not come with a cord and plug then my guess is you cannot use cord and plug and mount the units in any permanent way. How would you maintain the explosion proof status with cord and plug?
Assuming they are only using them in that area... also very expensiveExplosion proof receptacles and plugs?
Actually the NEC does deal with portable luminaires. See Section 501.130(B)(4). Cords and such are dealt with in Section 501.140.What do you mean by string them together? If it is portable then the NEC does not get involved but if this is a listed fixture and does not come with a cord and plug then my guess is you cannot use cord and plug and mount the units in any permanent way. How would you maintain the explosion proof status with cord and plug?
Assuming they are only using them in that area... also very expensive