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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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    Thank you Chris. I have seen a lot on sites locally supplementary bonding on isolators or junction boxes and just wondered if it’s needed(usually daisy the armours together) Even if the cable try is bolted to the ground with small through bolts I couldn’t see it introducing a good earth potential.
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    Thank you Chris. I have seen a lot on sites locally supplementary bonding on isolators or junction boxes and just wondered if it’s needed(usually daisy the armours together) Even if the cable try is bolted to the ground with small through bolts I couldn’t see it introducing a good earth potential.
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