Main bondage

[ultinator]

Does main bonding in every circumstance always need to be under 0.05. main bonding in a house where the main water was moved has 10mm cable but resistance of 0.25 ohms!!>>

 

[Jonny66]

Never, I will never grow up and you can't make me Boff, so there ya cheeky little monkey…as an aside I wonder what that 0.05 ohms might mean?

 

[Marvo]

Stop the bickering and keep the thread on topic.

 

[Guest55]

banstick for jenny66 ?
;-)

 

[netblindpaul]

I am perfectly willing to accept thanks for the information given in Voltz's posts if you think it is valuable, after all I missed much of the Wales Vs France game to explain it to him in detail!

 

[Jonny66]

Boff, you may not understand this, but there are sticks and some of them are for throwing but unfortunately Boff these sticks are not stones and will not break my bones.

 

[Jonny66]

Can you see professor Boff, how a simple piece of writing can be miss understood, so therefore someone with your capacity to soak up information at such an incredible rate should in all probability probably be a lot more humble.

 

[Jonny66]

Or in all probability be a plumber.

 

[Marvo]

Stop the bickering and keep the thread on topic.

You were warned.

 

[Guest55]

banstick for jenny66 ?
;-)

xmas came early thanks to the santa known as Marvo.
Salut !

 

[Geoffsd]

The 0.05 value is the value below which potential difference should be, between simultaneously accessible extraneous conductive parts. Example of which is a gas pipe and a water pipe next to each other. Test between the two.

Even if both are 10mm bonded individually back to MET, if the difference between the two is greater than 0.05 then they need to be bonded to each other.

If that is the case then that would be supplementary bonding which, unless in a bathroom or similar location, is not required.

The 0.05 figure is not a value to be achieved between MET and bonding point taking into account the value of resistance of the cable.

But that is, indeed, what is required in my old copy of GN3 (has it changed?).

So - if still required, it must be agreed that it is not possible to achieve this with a conductor whose own resistance is greater than 0.05Ω.


It also states that supplementary bonding conductors must have a resistance of 0.05Ω or less.

 

[KAS1]

The 0.05 ohms has nothing to do with the value of the bonding conductor at all, it or any other measurement you will be able to work out the length of any size cable, so once again nothing to do with the bonding conductor max value.

 

[Guest55]

stuff........

yawn....

 

[Guest55]

If that is the case then that would be supplementary bonding which, unless in a bathroom or similar location, is not required.


But that is, indeed, what is required in my old copy of GN3 (has it changed?).

So - if still required, it must be agreed that it is not possible to achieve this with a conductor whose own resistance is greater than 0.05Ω.


It also states that supplementary bonding conductors must have a resistance of 0.05Ω or less.

i wouldnt consider anything written in the guidance notes as regulations that need to complied with to be honest Geoff.

 

[Guest55]

10 , 9 , 8 , 7 ,...........

 

[Swicade]

First time i've read this thread but the most amusing point of it for me is the fact post #14 explained the 0.05 value and it seems to have taken a day for many others to catch up....