Distributors earthing?

[Grayza]

Hi, Came across this the other day when looking to quote for a CU change. I can't figure out how the installation is earthed. There is bonding to the water pipe. I didn't take the cover off the existing CU as it wasn't practical when I visited. Measured a Zs of 0.3 from a socket. Its a terrace house, so wouldn't think its a TT. Does anyone have any thoughts?
Thanks

 

[David Prosser]

I find when asking for an upgrade i helps if you say you are fitting electric showers and induction hobs.

 

[Octopus]

its date of birth ,and when is next birthday party .

There is an estate in Byfleet of 1950's houses where the earth is from a random socket to the pipework under the floor - not ideal!

 

[Grayza]

Not sure how old the house is maybe 50's or earlier. I didn't take the cu cover off, as wasn't convenient.
I will get the customer to request a new head.
Cheers for the replies everyone.

 

[bigspark17]

Not sure how old the house is maybe 50's or earlier. I didn't take the cu cover off, as wasn't convenient.
I will get the customer to request a new head.
Cheers for the replies everyone.

Puzzled how you can offer a price on cu change without taking the cover off?

 

[David Prosser]

Puzzled how you can offer a price on cu change without taking the cover off?

Million pounds per circuit. No need to remove cover.

 

[Grayza]

Firstly as I said it wasn't convenient to take the cover off and secondary, I don't see why its necessary. Do you always take the cover off when quoting for a Cu change? Apart from maybe all the circuits with fuses/MCBs may not be connected. Please do enlighten me?

 

[telectrix]

you take the cover off to do some basic testing , mainly to ensure that you won't get anty poor IR readings /OC rings/ etc. which would entail additional costs. then you quote accordingly, knowing what extra work may be involved.

 

[Dave OCD]

I quote based on all tests being satisfactory with the agreement that any issues found during testing that need sorting out will be done at additional cost. But the original quote will include earthing/bonding upgrades if necessary.

 

[Grayza]

That's what I quote, CU replacement + any faults found whilst testing will be carried out at an additional cost.
I'm not going to carry out any tests without being paid for it. I may advise testing be carried out before and provide a separate quote for that.

 

[Octopus]

What have you said to the customer about the earth or lack of?

 

[Grayza]

I've asked the customer to call his suppliers and have them check it out and also mention that the cut out looks damaged.

 

[paleosparky13]

I find when asking for an upgrade i helps if you say you are fitting electric showers and induction hobs.

It's integrated earthing/conduit. It predates all the cpc normal bonding arrangements. Use gn8 for acceptable readings of continuity and impedance etc.