Plastic water incomer-

[Dave 85]

Hi lads.
Doin a new build log holiday home. Water main is plastic into the cabin then goes Into a bit of surface copper round the tank then back to plastic for all hidden pipe work. Do I need a main bond?

 

[telectrix]

so what if the reading to the MET is between 10k ohms and 22k ohms. we say bond it . niceic say don't bond it.

 

[sedgy34]

Eh?

In another thread you say that you wouldn't bond an incoming lead water pipe, yet here, you'd bond a length of copper on an incoming plastic water pipe...

Confused!!! :confused5: :crazy:

I read the question as copper above main tap going round into cylinder all pipework in cylinder area as copper then all plastic pipes hidden in walls etc.
So yes bond it
other thread was onabout lead pipe

 

[brman]

so what if the reading to the MET is between 10k ohms and 22k ohms. we say bond it . niceic say don't bond it.

So 10k would put about 20mA through you, sounds a bit high to me for a "safe" current. To be fair, when I was doing my 2395 my tutor said 10k. However elecsa told me 22k so i will stick with that.

 

[IQ Electrical]

Stick with 22k as per Guidance Note 8 and your scheme provider can take a hike, where did this 10k come from?

The calculation came from 10mA being the let-go threshold and 1000 Ohms being an average resistance for a human body, makes perfect sense to me!