B-Line Eaton series imperial cable tray and ladder, 4" Height, 31.188" Length, 12" Width, Series 2-5 vertical inside bend, Aluminum, 90° Angle, 24" Ra

A vertical inside bend turns the tray run up or down while keeping the cables on the inside of the curve, so the bend radius protects the conductors instead of pinching them. The Eaton B-Line 4A-12-90VI24 makes that turn at 90 degrees on a 24 inch radius, in a 12 inch wide, 4 inch deep aluminum ladder tray profile. If your run needs the cables riding the outside of the turn, you want a vertical outside bend instead, not this fitting.

Yes, the 4A-12-90VI24 vertical inside bend is UL Classified, which is the listing electrical inspectors look for when cable tray is used as an equipment grounding conductor per NEC Article 392. Keep splice plates and bonding jumpers consistent through the fitting so the grounding path stays intact.

Allow for the fitting's 31.188 inch overall length along the run, which is the dimension the 24 inch radius 90 degree turn eats up before your next straight section starts. It weighs 9.3 lb, so one person can set it, but plan a support close to each end of the fitting as you would for any tray bend.

Aluminum is the usual pick for corrosive, wet, and outdoor tray runs because it resists corrosion without coating and weighs far less than steel, which is why this bend comes in at 9.3 lb. Where the environment is dry indoor and cost or heavier load is the driver, a steel tray system is the alternative. Keep the whole run in one material so the fittings, straights, and splice plates bolt up as a matched system.

The order covers the bend fitting itself. Splice plates, hardware, and hold-down clamps for joining it to the adjoining straight sections are ordered separately, so count four splice plate sets per fitting (two per end, one each side rail) when you build the bill of material.

Eaton B-Line part number 4A-12-90VI24. The number reads out as 4 inch rail depth aluminum, 12 inch width, 90 degree vertical inside, 24 inch radius. Distributors cross-referencing should note it is the Series 2-5 ladder tray fitting family.