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Supplementary bonding

MrJack96
ff4dd4e3be3fd92a2860545df50ddca9-huge-5418b436-fc4e-47b3-a594-4fea60cb12cd.jpgI see this a lot on sites where they’ve got an armoured cable with an earthing ring/banjo connecting the armour to an extraneous conductive part. Should there also be main bonding run as well? Common thing I see is cable tray being supplementary bonded of a local isolator usually 6mm or 10mm?
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    This reminds me actually so say you have a concrete tank (rebar) set into the ground then an electrical systems running over on a metal Platform with submersible pumps in the tank should the tank have been main bonded at the installation stage? Say the electrical system ie pumps have been earthed and all cable tray and armoured cables have been locally bonded together.
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    This reminds me actually so say you have a concrete tank (rebar) set into the ground then an electrical systems running over on a metal Platform with submersible pumps in the tank should the tank have been main bonded at the installation stage? Say the electrical system ie pumps have been earthed and all cable tray and armoured cables have been locally bonded together.
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