Can any regular wire be used as a jumper? No, the wire must be officially approved for grounding. Most professionals choose braided copper jumpers. These look like flat, woven ribbons. They are great because they can bend and shake without snapping. Installation Guideline: Scroll to bottom of page to view All Bonding Jumpers Cut Sheets A bonding jumper is required to be installed with adjustable splices and expansion splices. Includes Cable with Crimped Lugs & Hardware Category: Cable Tray Bonding Jumpers Cable Runway Bonding Strap Kit, #6 AWG Bonding Strap with Hardware, Pack of 25 Kits Category: Cable Tray Bonding Jumpers Bonding Jumper, 16 Inch, Tinned Copper. Cable tray may be used as the Equipment Grounding Conductor (EGC) in any installation where qualified persons will service the installed cable tray system.
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Can be single or multi ratio (MR). Rule of thumb, select a ratio slightly larger than the rating of the circuit to be protected. Numerical relays have more forgiveness than induction disk. Thus, the concerned feeder be-longs to the protection area of the relay 1 and relay 2, providing an inherent backup protection for the feed-er. Should relay 1 or its circuit breaker fail to operate, relay 2 will be allowed. Protective relays and devices have been developed over 100 years ago to provide “lastline”of defense for the electrical systems. Circuit Breakers (CBs), as well as Voltage and Current.
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