Requirements for cable tray installation jumpers
Ground cable trays at least every 15 m (50 ft) and at both ends to maintain electrical continuity and safety. It is not necessary to install bonding jumpers in parallel with the standard rigid aluminum or steel one-piece metallic bolted side rail splice plates that are the connections between the cable tray sections. The following pages address the 2014 National Electrical Code® requirements for cable tray systems as well as design solutions from practical experience.
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