Gas Bond in block of flats

[ch1cki]

Hi

Is it ok to link several gas meters from the MET in a block of flats which previously had night storage heating in all of them. I only say this because of the work it would involve running separate cpc's from each CU to the meters.

Cheers

Paul

 

[sparks1234]

Hi

Is it ok to link several gas meters from the MET in a block of flats which previously had night storage heating in all of them. I only say this because of the work it would involve running separate cpc's from each CU to the meters.

Cheers

Paul

presumably all the meters are together in one place, each dwelling should have its own bond as it enters

 

[ch1cki]

3 meters are out the front right next to each other about 8 meters away from meter cupboard.

 

[sparks1234]

3 meters are out the front right next to each other about 8 meters away from meter cupboard.

Bond each flat as it enters the particular dwelling

 

[ch1cki]

From MET?

 

[sparks1234]

From each flat's consumer unit or earth block

 

[davesparks]

Also if the gas pipes run internally in the common areas then they become extraneous parts to that installation and should have a main bond back to the appropriate MET for that installation.

 

[Had8Lives]

I think if you take the wording of the regs literally, it says "within 600mm of the consumers side of the Meter or where the pipe enters the building". So if the meters are together in a meter room and the pipe is continuous to the flats, I don't see an issue. Unless of course the block of flats is like 100 miles high, then a potential could get built up.

 

[Robert Turnbull]

The theory of that makes sense but most would bond the pipe work as it enters each dwelling to the local ccu.

Best way would be to measure the resistance to the pipework back to the local ccu in each flat with it bonded in the hallway. If it's less than 0.05 then maybe you have a case that no more bonding is needed.

 

[davesparks]

Blimey, the regs are pretty clear on this one!
You bond the gas pipe as it enters the installation (the flat)
And also as it enters the communal area if appropriate (a seperate installation)

Guidance note 8 page 67 'multi-occupancy premesis'

 

[Engineer54]

There is only one MET and that is at the origin of the supply. The incoming metallic gas pipe,(and/or water pipe) will require main bonding to the MET. The flats will have an EMT (Earth Marshalling Terminal). Where a main bond connection is also required at each flat, as the gas/water supply pipe enters each of the premises. Even if the the main gas/water supply to the premises is plastic, but the rest of the pipework is metallic. Especially so, if the building is concrete framed with concrete floors/ceilings...