B-Line Eaton series wireway elbow fitting, Lay-in, 45° elbow, top opening, 12 rated, Steel, 6" X 6"

The Eaton B-Line 66-12LE45C is a 6 x 6 inch wireway fitting, so it mates to a 6 inch by 6 inch trough run. The fitting measures 6 inches high by 6 inches wide with a 3.91 inch length/depth. Running 4 x 4 or 8 x 8 trough? This one won't line up, you need the elbow built for that cross section.

It carries a NEMA 12 rating, which covers dust, falling dirt and dripping non-corrosive liquids in indoor industrial spaces. It is not a wet-location or outdoor rating. For direct hose-down or exterior runs you need a NEMA 3R or 4 rated wireway system instead. The fitting is also UL Listed.

Orientation matters. The 66-12LE45C is a top-opening lay-in elbow, meaning the removable cover is on the outside of the 45 degree bend so conductors drop straight in from above rather than being pulled through. Mount it with that opening facing up and accessible. If your run turns with the open face on the side or bottom of the bend, this fitting is the wrong one for that geometry.

Yes, that's the point of the lay-in design. Pull the cover, drop the conductors into the 45 degree bend, then reinstall the cover. It saves the pull at a direction change, which is why lay-in trough fittings get specified on long feeder runs with multiple offsets.

Order Eaton B-Line part 66-12LE45C. That number encodes the 6 x 6 size, NEMA 12 rating and the lay-in 45 degree elbow with top opening, so it's the one to put on the PO or hand to a purchasing agent standardizing a plant's wireway accessories.

Steel construction, and the fitting weighs 6.518 lb. That's light enough for one person to set on a hanger, but plan support on both sides of the bend the way you would for any steel trough direction change. Steel is the standard choice for indoor industrial NEMA 12 wireway; if the environment is corrosive you would be looking at a stainless or coated system instead.