Earth cable size

[scamp]

I am in the process of having a new consumer unit installed, when the electrician came to give me a quote, he said that the earth bonding cables from the meter earth bar ( one goes to the gas meter pipe, the other goes to the central heating and is interconnected to 4 pipes) are undersize.
They are currently 6mm but he says they should be 10mm. If they are undersize I will replace myself. Do they need upgrading to 10mm?

 

[plugwash]

if your supply is TN-S or TN-C-S (earth provided by rec) then yes they need upgrading to 10mm

im not sure what the requirements are if its a TT (only earth from a rod)

 

[scamp]

What does TN-S, TN-C-S mean?

 

[ban-all-sheds]

See this: http://www.tlc-direct.co.uk/Book/5.2.1.htm

You could also try searching this site, or the interweb, for those terms.....

http://uk.altavista.com/web/results?itag=wrx&q="TN-S"+OR+"TN-C-S"&kgs=1&kls=1

 

[plugwash]

 

[ban-all-sheds]

Naughty plugwash - those tails should be DI...

 

[plugwash]

i didn't draw it its just a pic from the for reference section

 

[ban-all-sheds]

Damn! - missed all the fun again...