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Earthing or bonding ?

MrJack96

I see it a lot where the SWA isn’t serving as a protective conductor which I know it must still be earthed at one end due to being an exposed conductive part. My question is if multiple SWAs are all earthed at the supply end and meet again at a bit of equipment if we then connect all the SWAs together locally is this still classed as earthing even though they are already earthed at the supply? 

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    The other SWAs are just control cables which have been all connected again at the bottom of the enclosure (red) 

    Where do these control cables go? presumany not to the source of supply where the main supply cable is earthed?

    Could all the G/Y jumpers be just connecting the incoming c.p.c. to the outgoing cables (again c.p.c.s/Armours)?

       - Andy.

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  • 0

    The other SWAs are just control cables which have been all connected again at the bottom of the enclosure (red) 

    Where do these control cables go? presumany not to the source of supply where the main supply cable is earthed?

    Could all the G/Y jumpers be just connecting the incoming c.p.c. to the outgoing cables (again c.p.c.s/Armours)?

       - Andy.

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  • 0 in reply to AJJewsbury
    AJJewsbury said:
    The other SWAs are just control cables which have been all connected again at the bottom of the enclosure (red) 

    My take: BS IEC 61000-5-2 recommendation to reduce inductance, although a better approach would be a conductive gland-plate, conductive seals etc. (with its own earth stud connected to earthing terminal) to ensure metallic enclosure also provides EMC enclosure as well.

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