B-Line Eaton series wireway, 12" height, 24" length, 12" width, G wireway, Thru holes, 7 top knockouts, 7 bottom knockouts, Screw cover, 1, Steel, Pl

It's a 12 x 12 inch cross section, 24 inches long. That 144 square inch interior is the number you use for NEC conductor fill and wire-bending calcs, and the 24 inch length makes it a short gutter section rather than a full run, so it's typically used as a pull/junction gutter above a panel or as a make-up section between longer lengths.

No. It's a NEMA 1 enclosure, which is indoor, general-purpose protection against incidental contact and falling dirt only. No rain, sleet, hose-down or corrosive locations. For an outdoor run you need a NEMA 3R raintight gutter with gasketed, drip-shielded covers instead.

Yes, 7 knockouts on the top and 7 on the bottom, so conduit can land from above and below without field-drilling. The ends are open for coupling to adjoining sections. If your feeds come in from the sides or the back, you'd be drilling and bushing those yourself.

It's a screw cover, secured with plated screws along the full length. You back the screws out and lift the entire cover off, which gives you an open trough for laying in and training conductors, then reinstall. That's different from a hinged or latching gutter cover, which you can open one-handed during service. If you expect frequent access after the install, a hinged cover style is easier to live with; if it's a wire-pull gutter you'll close up and leave, the screw cover is the normal choice.

The 121224 G wireway is CSA Certified, so it can be specified on work requiring CSA-certified electrical enclosures.

Model 121224 G is a single 24 inch section. For a longer run you add further 12 x 12 sections and join them end to end, then close off the run with 12 x 12 end plates and use connectors, elbows or tees where the gutter changes direction. Keep every accessory in the 12 x 12 size so the flanges line up.

14 gauge steel finished in ANSI 61 gray, which is the standard gray used on switchgear, panelboards and industrial control enclosures, so it lines up visually with most electrical equipment already on the wall. Screws are plated.