No Water bond

[Jeremy Hale]

Installed a cooker circuit on a fairly new house, found a 16 mm main earth and 10mm bond to Gas pipe. No water bond, there is a blue plastic water pipe entering house to stop cock and then copper pipe, lots of internal plastic pipe. Boiler has copper pipe with no cross bonding. The consumer unit is Wylex split board with dual 30ma mobs. Should I upgrade earthing or is this install OK due to the water pipe is not an extraneous conductive part?

 

[Dustydazzler]

I believe the technically correct answer is to test the pipe to see if it’s is extraneous

My actually answer would be don’t bother

 

[Strima]

As the water has an insulating section where it enters the property then there's no requirement to bond.

Any copper pipework that's connected to the boiler will have continuity via the manifold and should be earthed via the boiler CPC.

Test to see if extraneous if you're not 100%.

 

[Corbs]

As the water has an insulating section where it enters the property then there's no requirement to bond.

Any copper pipework that's connected to the boiler will have continuity via the manifold and should be earthed via the boiler CPC.

Test to see if extraneous if you're not 100%.

can the same be said for the gas then as most of it these days is mdpe?

 

[davesparks]

can the same be said for the gas then as most of it these days is mdpe?

Yes, the only reason most of us install main bonding to the gas these days is to stop the gas safe muppet from whinging about it.

 

[HappyHippyDad]

Installed a cooker circuit on a fairly new house, found a 16 mm main earth and 10mm bond to Gas pipe. No water bond, there is a blue plastic water pipe entering house to stop cock and then copper pipe, lots of internal plastic pipe. Boiler has copper pipe with no cross bonding. The consumer unit is Wylex split board with dual 30ma mobs. Should I upgrade earthing or is this install OK due to the water pipe is not an extraneous conductive part?

Have a look at 411.3.1.2. This regulation suggests it does not need to be bonded.
I struggle with the idea of testing to see if extraneous as it's going to be connected to the main earth somewhere throughout the route in the house and therefore the test will not be accurate.

 

[davesparks]

Have a look at 411.3.1.2. This regulation suggests it does not need to be bonded.
I struggle with the idea of testing to see if extraneous as it's going to be connected to the main earth somewhere throughout the route in the house and therefore the test will not be accurate.

The test is carried out between the means of earthing and the possible extraneous conductive part with the installation isolated and the earthing conductor disconnected.
So all protective conductors will be excluded from the test.

 

[Ian1981]

As far as gas installers are concerned, the bonding to the gas pipe is in case it becomes live!
They are clueless as to why we do or do not need to provide protective bonding to their extraneous or nowadays non extraneous pipework

 

[Dustydazzler]

Many moons ago I witnessed a corgi gas guy put a bonding clamp on the yellow gas pipe in the gas cupboard...
At least he could say the gas was bonded

 

[Ian1981]

Ignorance knows no bounds

 

[telectrix]

Ignorance knows no bounds bonds

corrected that 4 u

 

[Midwest]

I had one unhappy customer, who was having a gas meter replaced, and the gas guy refused to install the new one, until the gas bonding had been rectified. He said if he came back, and the work had not been carried out, he would have to disconnect their supply. It worried the elderly couple greatly.

The problem; external meter box, copper gas pipe into garage through wall. Then up to ceiling level where it was bonded, about 2 metres from point of entry. Gas bloke said bonding must be in meter box.

So I obliged him, and bonded at point of entry in garage. Gave couple a MW quoting 544.1.2 (BYB), and if he had an issue, to give me a call and I'd pop round for chat.

 

[telectrix]

within 600mm of point of entry into building, that may be inside ( before any branch ) or outside (in gas meter box ). either is compliant.

 

[Risteard]

Many moons ago I witnessed a corgi gas guy put a bonding clamp on the yellow gas pipe in the gas cupboard...
At least he could say the gas was bonded

I went to a reconnection job a couple of years ago where someone had looped main bonding across multiple plastic pipes in the hot press all with BS951 clamps on them. I even took a photo at the time. Words failed me.

 

[Midwest]

within 600mm of point of entry into building, that may be inside ( before any branch ) or outside (in gas meter box ). either is compliant.

Yep, but doesn’t HAVE to be in the meter box, as this bod was insisting, or he’d cut them off.