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 at standard rigid galvanized steel or aluminum splice plate connections or offset reducing. 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 need to attach jumper wires to circuit board assemblies is inevitable. Essentially, jumper wires fall into three basic categories: First, those that are considered a component and part of the. A distribution box is the heart of any electrical system. It takes the incoming power and safely distributes it to different circuits throughout your building.
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