earth bonding under sink

[zetland76]

I noticed that the hot and cold water feeds under the sink are bonded with an earth wire back to the electric meter. I guess that this means the stainless steel sink is also bonded through the tap fixing.
I have to replace the tap and will change some of the original copper pipe feeding the tap with plastic (original earth bonding not removed). Will I now have to put an earth bonding on the sink?

 

[EFLImpudence]

NO.

 

[PrenticeBoyofDerry]

There is no requirement to earth the sink, but you must make sure continuity of the main earth bonding is still maintained back to the fuse board/MET.
So if you put a plastic insertion between the copper pipe coming from the internal stop tap and where it is bonded, the bond would be required to be clamped at the most practicable position near stop tap before plastic inserts.