Splice plates should be placed on the outside of the cable tray with the bolt heads on the inside of the cable tray (Figure 4. No more than one splice shall be located between two adjacent supports. This is a description of how to select, install, and support these metal or plastic frames, on which electrical wires are installed. Specifically, NEC Article 392 governs the use, installation, and construction specifications for these systems. This article details everything from permitted uses and cable types to fill capacities and. According to NEC Article 392. 10 (B) (1), the smallest size single conductor allowed to be installed in a cable tray is 1/0 AWG. Also, it is important that the wings of the T-bolt stay inside the sl ts in the side channel.
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