1250-4-EXP Explosion proof junction box

Summing junction cards are mounted in enclosures rated Class I, Group D; Class II, Groups E,F & G; NEMA 7 & NEMA 9.
Each box has 5 holes drilled and tapped for 1/2" conduit size.
Screw on cover has O-Ring for NEMA 4 watertight.
Also complies with UL Standard 886 and CSA Standard C22.2 No. 30 1970.
1250-4-EXP contains a summing junction card 1200 Series.
It is behind a flat screw on lid for fast access and adjustment.
Summing card will connect 2 to 4 load cells.