They're made of heavy-gauge steel wire, so you should be able to just pull out your cable tray cutter, snip out a few strategic rungs and form your bend, right? Wrong — not if you want your installation to meet National Electrical Code (NEC) and UL Solutions requirements (and. They're made of heavy-gauge steel wire, so you should be able to just pull out your cable tray cutter, snip out a few strategic rungs and form your bend, right? Wrong — not if you want your installation to meet National Electrical Code (NEC) and UL Solutions requirements (and. Table 2 of NEC provides the minimum radius of conduit bends. Is there some similar table or other reference available for the minimum radius of cable tray bends? For example, if we have to make a field bend for a 12” (300mm) metallic ladder tray using straight sections of this tray, then how much. Cable tray bends are designed to guide cables around obstacles, changes in direction, or elevations in an electrical system. They come in various configurations, including horizontal bends, vertical bends, and tees. The ET 'EzyTray', ET3 and ET5 are designed to work how you want to work around your project. Unlike the CT range of tray, the ET range does not come with pre-made fittings, rather, it uses accessories that allow you to bend, rise, or join straight lengths together either in series or to fabricate a. NEC Article 392 explains cable trays, their components, appropriate wiring methods for cable trays, and instances where they are and are not permitted for use. It also focuses on construction and installation practices for cable trays. Here is the summary of the main points found in NEC Article. Solid Bottom cable tray is generally used for minimal heat generating Electrical or telecommunication applications with short to intermediate Trough Cable Trays Moderate ventilation with added cable support frequency and with the bottom configuration providing cable support every 4 inches.