Identifying installation type tt??

[who took my fluke?]

Hey guys, looking at a friends house installation that he wants checked out before he has a rewire. Looking at the main supply cable to the house (old terraced house) there are only 2 conductors in the PVC cable (16mm red and black). Looking further there appears to be no earth bonding to pipes atc and more importantly NO EARTH at all, been around the back of the house and cannot see an earth rod or pit or any evidence of an earth cable in the consumer unit. Am i right in thinking that this is should be a TT installation??! in which case an earth rod be installed straight away and the whole thing RCD protected

 

[JohnD]

the supplier might be willing to turn it into a PME for a modest fee.

 

[who took my fluke?]

intersting, didnt know they would do that? how do i go about asking that question??

 

[JohnD]

Get "the person who pays the bill" to write to "the company that sends the bill" and ask for it. The supplier is responsible for knowing who actually owns and maintains the network, and passing the request on. It will be an advantage to quote the account number and the meterpoint number if you can recognise it on the bill.

In my experience of the electricity supply industry, with a less-usual request you more likely to get an informed reply with a letter than with a phone call to a "customer service" centre.

 

[securespark]

But in the meantime, knowing what you know now, you must fit an earth rod and at least a 30mA RCD on the tails. Technically, there should be a TD Split-load board to comply with current standards, but if you do get it converted to PME, all you need is a standard split-load board or a normal 100A incomer board with RCBO's.

The earth rod has to be under 200 Ohms, or 100 if you of an NIC bent.

If you know who took your fluke, get it back off them and make some basic checks. This is an "at risk" situation, especially as there may be a connection to the water pipe (use as earth supply disallowed since 1966) or gas pipe (use as earth supply never allowed).