Hope Electrical Products is a Manufacturer of Cast Iron & Cast Aluminum Electrical Junction Boxes, Enclosures, Housings & Cabinets for Industrial & Commercial Use. Boxes That Are: NEMA Rated, Explosion Proof, U.L. Listed ......Hope Electrical Products is a Manufacturer of Cast Iron & Cast Aluminum Electrical Junction Boxes, Enclosures, Housings & Cabinets for Industrial & Commercial Use. Boxes That Are: NEMA Rated, Explosion Proof, U.L. Listed as well as Sidewalk & Floor Mounted Boxes.