Bonding
– Bonding is a method to connect conductive materials and metallic surfaces.
– It ensures that all accessible surfaces are at the same potential, reducing the risk of electric shock.
– Bonding allows safe conduction of fault currents, induced currents, surge currents, lightning currents, or transient currents.
Applications
– Electrical code regulations require bonding jumpers where the continuity of a bonding system might be interrupted.
– Bonding jumpers may be needed in metallic conduits or electrical metallic tubing exposed to corrosion or mechanical damage.
– Main electrical panels require a bonding jumper to connect the system neutral conductor to earth ground.
– Bonding jumpers can be installed on hinges or bearings for electrical safety grounding and control of electromagnetic interference.
– Temporary bonding jumpers are used to prevent static charge ignition in handling flammable liquids and gases.
Rules for Bonding Jumper Installation
– Jumper installation rules are given in electrical code regulations.
– Bonding jumpers are required where metallic conduits join an enclosure without good electrical contact.
– Some codes require bonding jumpers in non-metallic conduit or electrical metallic tubing exposed to corrosion or mechanical damage.
– Main electrical panels require a bonding jumper to prevent objectionable current flow in the earth.
– Bonding jumpers are installed on hinges or bearings for electrical safety grounding and control of electromagnetic interference.
Types of Bonding Jumpers
– Copper conductors, rated lugs, bolts, fasteners, or screws are commonly used as bonding jumpers.
– Brackets, clamps, exothermic bonds, or welds can also be used for effective connections.
– Bonding jumpers must be sized to safely handle anticipated fault currents.
– Temporary bonding jumpers are used for handling flammable liquids and gases to prevent static charge ignition.
– Bonding jumpers can be installed on hinges or bearings for electrical safety grounding and control of electromagnetic interference.
References
– ‘Safety and Health Requirements Manual: U. S. Army Corps of Engineers’ edited by Robert H. Griffin (1999).
– ‘Electrical Installations in Hazardous Locations’ by Peter J. Schram and Mark W. Earley.
– ISBN0-7881-7015-5, p.181.
– Jones & Bartlett Learning, 1997.
– Retrieved from https://en.wikipedia.org/w/index.php?title=Bonding_jumper&oldid=997143367. Source: https://en.wikipedia.org/wiki/Bonding_jumper
A bonding jumper is a reliable conductor to ensure the required electrical conductivity between metal raceways required to be electrically connected.
