Make sure supports are spaced properly, typically 1. A poorly mounted tray leads to sagging and safety risks. Install with Precision Align trays straight, level, and secure using connectors and fittings. This is a description of how to select, install, and support these metal or plastic frames, on which electrical wires are installed. You should consider it as a series of instructions that make the buildings resistant to. Cable tray (or cable ladder) systems are a popular alternative to electrical conduit systems, as they have an outstanding record for dependable service, design flexibility and cost savings in commercial and industrial applications. This article details everything from permitted uses and cable types to fill capacities and. The exception is that 9 inches is the maximum allowable rung spacing for a ladder cable tray supporting any 1/0 through 4/0 single conductor cables [See Section 392.
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