B-Line Eaton series Type 3/3R junction boxes, 18" height, 8" length, 18" width, 3 and 12, Screw cover, WPSC enclosure, Surface mounted, Medium single

18 inches high, 18 inches wide, and 8 inches deep. That 8 inch depth is what decides whether your terminal blocks, breakers or wire bending space fit, so measure your deepest mounted component plus gutter space before committing. Weight is 21.5 lb empty.

It surface mounts on external mounting feet welded to the back, so the fasteners go through the feet and never through the enclosure wall. That keeps the Type 3R seal intact and stands the box off the mounting surface so moisture drains behind it. Feet work equally on masonry anchors, a plywood backboard, or Unistrut. At 21.5 lb empty, size your anchors for that plus whatever you mount inside.

No. The WPSC is supplied as a blank screw-cover enclosure, so conduit entries get punched in the field. Put them on the bottom or the sides rather than the top if you want to keep the Type 3R rating honest once the box is in weather.

A screw cover like the 18188 WPSC is the right call for pull boxes, splice points and terminal enclosures you only open during service. The cover comes off entirely, which gives clear access for pulling conductors, and the gasketed screws clamp the seal evenly. If an electrician or technician needs daily or weekly access, or the box hangs where a loose cover would be dropped, go to a hinged-door enclosure instead.

Carbon steel at 16 gauge, finished in ANSI 61 grey paint. ANSI 61 is the standard grey used across industrial control gear, so it matches existing panel lineups on most plant and facility installs. Being painted steel rather than stainless, keep it off washdown and coastal-salt locations where the finish will be attacked.

Order Eaton B-Line part number 18188 WPSC. The number reads as the dimensions: 18 high, 18 wide, 8 deep, with WPSC identifying the weatherproof screw-cover single-door style.