B-Line Eaton series imperial cable tray and ladder, 4" Height, 25.692" Length, 12" Width, Series 2-5 vertical inside bend, Aluminum, 30° Angle, 36" Ra

The 4A-12-30VI36 vertical inside bend is UL Classified. That is the designation to cite when an inspector or spec reviewer asks about the tray fittings in the run.

It depends which way the cables sit relative to the curve. An inside bend curves so the tray bottom is on the inside of the radius, used where the run rises away from the load side. An outside bend curves the other way. Getting it backwards means the fitting will not line up with the straight sections, so look at the run direction on the drawing first. The 4A-12-30VI36 is the inside version, 30 degrees on a 36 inch radius.

A vertical inside bend turns the tray run upward or downward while keeping the cables on the inside of the curve, so it is what you use where a run has to climb a wall or drop under an obstruction. Model 4A-12-30VI36 makes that turn at 30 degrees on a 36 inch radius, which is the sweep the cable bending radius rides on. Straight sections only carry the run; the bend is the fitting that changes its elevation.

Allow about 25.692 inches of length for the fitting itself, measured along the run, with the 36 inch radius sweep taken into account. Lay that out before you cut your straight sections, and remember the 30 degree turn changes elevation over that distance rather than staying flat.

The item supplied is the 30 degree vertical inside bend itself. Splice plates, connectors, and mounting hardware for joining it to the adjacent straight sections are ordered separately, so count the joints in your run and add the splice kits for 12 inch aluminum series tray to the order.

Order Eaton B-Line part 4A-12-30VI36. The number breaks down as 4 inch depth, aluminum, 12 inch width, 30 degree vertical inside bend, 36 inch radius, which is useful when you are cross checking a submittal against what arrives on site.