Looking for opinion on whether this scenario is compliant

[The Ghost]

Went to daughters house to replace a couple of broken sockets and did a Zs and RCD test after replacing. CU was replaced and notice on it said inspected 2015. Plastic dual RCD 30 ma/Main switch 60947-3 isolator. System is TT. (100ma RCD?)
Zs at socket was 11.75 ohms L-PE 2.64 ohms L-N. No bonding present to services. Suggested my daughter might get the council in to check it out. Had a phone call today and electrician said it is all compliant! He also said it disconnects in 0.37ms and I asked to talk to him he would not. He said I was just trying to make money, if only he knew? Apparently he fixed the bonding in a few minutes.
I said to my daughter tell him it should be 0.2 (the property is not cross bonded as in the exception to table 41.1) he said that was the case 20 years ago and I needed to get up to date. Okay!
I must confess to be a little bit taken aback by this and thought I would do a sanity check with the forum members. I do have Amd 3 BS7671 by the way i.e. 2382-15 so I think I am up to date.
Essentially I am of course concerned for my daughter, and what appears to be possibly a cavalier attitude. I told my daughter to get a copy of the report and tests so we await that. Am I being concerned over nothing or just plain stupid??? Tin hat on.

 

[The Ghost]

0.37ms, that is quick what meter did he have.

To be clear when I checked the RCD I got at x 1 37ms at x5 13 ms

 

[The Ghost]

How did she contact them

Online system and the only way you can contact housing repairs.

 

[Wilko]

Just for fun
L-N at 2.64 Ohms implies 0.95x230/2.64x0.8 = 66A so it's good to disconnect B10 or C6 on a short .

 

[westward10]

The rcds are providing fault protection so the only issue is bonding??

 

[The Ghost]

Sorry but what disconnects what in 0.37 ms?

Yes, well chinese whispers I was quoting verbatim, however we must all assume what was meant is 37ms which is the same as what I got. But TT?

 

[telectrix]

then the disconnection time is compliant (200mSec.).

 

[The Ghost]

Ok then I am worrying about nothing. Good.

 

[Strima]

Ok so what about table 41.1 TT?

That’s for over current protective device disconnection not RCDs.

 

[littlespark]

Keep at them about the broken sockets, and the day before they say they're coming, go back and replace with the old ones.
But then, youll be sitting with broken sockets in your shed for the next 4 years

 

[Adam W]

So everything is RCD protected and the CU was compliant when it was installed.
Cross bonding is no longer necessary.
The water and gas supplies should be bonded unless the pipes are plastic.

 

[Gavin John Hyde]

When you say council @Vortigern do you mean a housing association? if so and its curo you can contact the head honcho victor da cunha and he will actually personally respond to emails and deal with any issues like this! one of the few decent chief exec's i have come across, most of the housing associations around the west country are quite decent, Bristol council are one of the few in the region who still own there own properties, have done work for them.. they are slow paying and quibble over silly little things in the price and everything is as cheap as possible. Would not do contract work for them again.

 

[The Ghost]

do you mean a housing association

Mmmm not sure now you ask!

 

[The Ghost]

That’s for over current protective device disconnection

Yes thats fine so I am testing socket and get Zs of 11.75, compliant or no? (RFC 32A)

 

[Dillb]

Yes thats fine so I am testing socket and get Zs of 11.75, compliant or no? (RFC 32A)

You will usually get higher Zs values ok a TT than a T-N system. What is the Ra valie?

 

[westward10]

Frankie??