L-E_Fault
Senior Member
- Joined
- Mar 23, 2009
- Messages
- 423
- Reaction score
- 0
Supplementary bonds should never be cut. As I understand it 16th Edition supp bonding is required, 17th CU supp bonding not required as supplementary protection is by RCD.I was told by an electrician that this bonding is no longer required if the water and gas is bonded where it comes in to the property. Which is news to me, what do you lot think?I realise the bonding is cut also which is bad practise? Bonding done by the gas fitter.
Tim
gives the guidance I believe...Supplementary equipotential bonding is required in some of the locations and installations or Part7 of BS7671.If the installation meets the requirements for earthing and bonding, there is no specific requirement in BS7671 for supplementary bonding of:
- Kitchen pipes, sinks or draining boards.
- Metallic boiler pipework.
- Metal furniture in kitchens.
- Metallic pipes to wash hand basins & WC's.
- Locations containing a bath or shower, providing the requirements o 701.415.2 are met.
Note metallic waste pipes in contact with earth must be bonded to the main earth terminal as they are extraneous conductive parts.
That is of course based on RCD everything - or am I stating the obvious :coatPage 31 On-Site-Guide....4.6 Additional protection - supplementary equipotentail bonding.
gives the guidance I believe...
There has GOT to be MAIN BONDING! reg 131.8 whether RCD or not.So if the circuits are RCD protected and the gas and water are mains bonded where they come into the property then theres no need to bond at the boiler.If theres no RCD protection and the gas and water are bonded on the incoming the boiler pipes need to be bonded.
If there was no RCD protection...
It could reasonably be assumed that the system was installed under earlier regs and would thus have to have complied with EEBADS thus be already supplementary bonded
Am I right so far?
If there is no mains bonding or RCD would you need to run an un-cut earth to the MET?
LOL I always steal your valuable advise!!!Ah.. Gh has been a postin while I was a composin.. and off visitin the kitchen! :^O :x
bit late for coffee. I could murder a toasted tea cake...............LOL I always steal your valuable advise!!!Whilst your in your kitchen, I could smell the cheese on toast and the warm smell of a coffee.
So I knew you would be busy, and jumped right in:^O
bit late for coffee. I could murder a toasted tea cake...............
Enter your email address to join: