bonding kitchen

[1878]

copper pipes from taps 6 inches then into a valve and from there plastic piping

to bond or not to bond?

xxx

 

[JohnD]

You are not required to Supplemetary Bond in kitchens if that's what you meant.

However, main Bonding is required to incoming metallic services where they enter the building (or come up through a concrete floor) on the consumer's side of the stop cock and any meter.

If it is partly plastic and partly metal, bond to the first metal section.

 

[gas4you]

However, main Bonding is required to incoming metallic services where they enter the building (or come up through a concrete floor) on the consumer's side of the stop cock and any meter.
quote]

Gas meter and pipe work must be within 600mm of meter and before the first T in the pipe work, not where it first enters the building.

 

[RF Lighting]

Really?

What if the meter is in an external cabinet, supplying a flat on the third floor? Still bond at the meter? or where the pipework actually introduces a potential into the equipotential zone?

 

[gas4you]

I come across this many times and still find that it has to be 600mm from meter. Our gas regs are slightly different to your electric regs I think. The only time I believe that the meter is not bonded as described is if it is in a seperate building such as a detached garage, then your 'at first point on entry of building' applies.

Any external gas meter is going to be outside the equipotential zone, is it not? Or maybe my understanding of the equipotential zone is incorrect

 

[dingbat]

RF is referring to the reasons we bond incoming services and it is all to do with introducing a potential (generally earth potential) into the equipotential zone, which is where the occupant may come into contact with parts of the electrical system.

If it doesn't introduce such a potential then there is no need to bond it at all and bonding it outside achieves nothing extra.

 

[JohnD]

I don't think my wording was very good, because I was actually thinking about a plastic water pipe coming into the house through the kitchen floor.

 

[gas4you]

RF is referring to the reasons we bond incoming services and it is all to do with introducing a potential (generally earth potential) into the equipotential zone, which is where the occupant may come into contact with parts of the electrical system.

If it doesn't introduce such a potential then there is no need to bond it at all and bonding it outside achieves nothing extra.

But then why do our gas regs state it must be 600mm from meter and before the first T, I mean I know why they state it, but am trying to understand from your point above, if that makes sense

 

[securespark]

The IEE regs say you can do one of two things:

either bond within 600mm & before any branch pipework, or you can bond where the pipework enters the property.

This first bit is the same as your "gas" regs, do they also mention the latter?

 

[ColJack]

as it does at my nans, the gas meter is in the box outside, pipes go from the box along the outside wall to the kitchen at the back of the house, and a gas heater in the front hallway.. entering the house at 2 points...

whilst taking part in a previous argument on this subject I happened to take a reading of the resistance between these 2 pipes with the earth bonds disconnected..

it was a few ohms..