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IP washers and earth continuity

IP washers and earth continuity

IP washers and earth continuity

What is your thoughts on providing metal to metal earth continuity when fibre washers are used between a metallic gland and metal enclosure?

RE: IP washers and earth continuity

If you need connectivity, why are fiber washers being used? (full disclosure, perhaps there's a code compliancy issue you're trying to resolve with the washer I'm unaware of).

EDIT: Missed the IP part in the original question... my bad.

Dan - Owner

RE: IP washers and earth continuity

If the fiber washers are there for IP protection to keep fluids out, then you probably need a conductive gasket around the washer to make the electrical contact, or a counterbore ring for the washer so you can compress the washer adequately for IP protection, and then compress it a little more to make metal to metal contact. It can be done with the right materials and proper engineering.

RE: IP washers and earth continuity

I have seen it where the gland has a fibre washer between the gland and enclosure and inside the enclosure a earth ring is fitted then a lock nut but wasn’t sure what the general consensus was on good engineering practice?

RE: IP washers and earth continuity

Earth rings are good for low frequency connections (bonding), but fairly worthless if you need the connection for an RF shield.


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