What are these wires under my sink please?

[TheClitterati]

There is similar in the bathroom. We are in mains combo boiler. I've not seen similar before.

Curious.

Yes I am cleaning out my under sink cupboard on Mother's Day.

It's an earth wire. To take the hit of a lightning strike and earth it so it doesn't follow all the metal pipework round your house.

I think.

Earth bonding for copper pipes.

@willowpatterns

This, and it also earth's any static accumulation, and if the pipework were to become live through a faulty appliance or a short.

@FixTheBone Was I at least partly right? Crikey!

They are supposed to be there. Green and Yellow is Earth. And not just lightning strike. All the metal worksurfaces / work stations at a commercial kitchen I worked in were earth-bonded like this presumably in case of electrical faults with equipment.

Leave them where they are.

Thank you all!

I'm not going to remove them. I just wanted to know what they are. Good to
Know. X

Next time you have electrical work done, I would get an electrician to look at it and change it. From the picture, they don't seem thick enough to comply with current regulations. It would also be a good idea to check that your heating and fuel supply pipes are also bonded.

Thanks I will do that. The wires are fairly thick and stiff.