Galvanized cable trays require jumper wires

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According to electrical installation standards, galvanized cable trays require jumper wires. Galvanized cable tray refers to a cable tray made of galvanized materials, which has good corrosion resistance and fire resistance, and can meet the requirements of indoor and outdoor cable. Standard splice plates can often provide a safe electrical path if they are UL Classified and bolted tight. However, you must use copper bonding jumpers if the tray is painted or has expansion joints for movement. 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.

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Grounding Requirements for Cable Trays

Jumper wires are not required if bolted connection is reliable. Each end of the connection plate shall be fixed with at least 2 bolts equipped with lock washers or lock nuts.

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Large power cables laid in the tray may require support blocks to maintain spacing between conductors, to prevent overheating of the wires. Smaller cables may be

Do galvanized cable trays require jumper wires?

In short, galvanized cable trays require jumper wires. When setting up jumper wires, it is necessary to comply with relevant regulatory requirements, pay attention to fire and moisture prevention issues,

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Cable tray installed in a hazardous location must contain only those cables that are appropriate for this type of environment as defined in Chapter 5 of the NEC.

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Microsoft Word

It is not necessary to install bonding jumpers at standard rigid galvanized steel or aluminum splice plate connections or offset reducing splice plate connections or any Classified connections.

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It is my opinion, and several others, bonding is not required from cable tray to utilization equipment when using type TC-ER cable even in hazardous locations. The cable tray system is

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Cable tray systems are in the path of ground fault currents. Cable tray systems are bonded together through their bolting, connectors splice plates, clamps, and bonding jumpers where there are gaps in

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