It is not necessary to apply conductive compound on the standard cable tray splice plate connections or to install bonding jumpers across the standard cable tray splice plate connections for aluminum or steel cable tray. Cable tray wiring systems have excellent safety and dependability records. A connection resistance above 0. Here, the use of bonding jumpers does not make a safety contribution to a properly. Cable tray may be used as the Equipment Grounding Conductor (EGC) in any installation where qualified persons will service the installed cable tray system.