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Discuss Gas and water bonding in the Electrical Forum area at ElectriciansForums.net

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R

Robo

I went to do a EICR yesterday. The guy had his friend re wire it but it wasn't tested or certified.jokers. Any ways. The water and gas were connected directly to the TNS supply cable. I don't see this is a major problem or would you say I should advice to connect into db.?thanks
 

telectrix

Scouser and Proud of It
Respected Member
a bit more detail would help. why has his friend not fitted a MET?
 

malcolmsanford

Electrician's Arms
Main Protective Bonding Conductors should be connected to the MET as regulation per regulation 411.3.1.2 and so connecting to the TN-S sheath direct is not advised.

Personally on a EICR I would code this perhaps 2/3 and recommending fitting a small earth block to address the situation
 

telectrix

Scouser and Proud of It
Respected Member
and don't forget to bond all the kitchen tables.
 

jase

Electrician's Arms
were there 2 cables? one for each? how were they connected? via EC16 earth clamps? if it is TNS then where does then main earth go? most of the TNS i see have an MET
 
R

Robo

There is the main earth connection inside the cutout where the 16mm earth goes to the board. The cable for each of the gas and the water are connected using an earth clamp to the outer earthed sheath of the cable.

I think I will code 2 this as malcomesford suggested and fit a small eart block in line and connect the two to that and then to db. Or directly to db if they will reach.

Thanks for the help
 
G

Guest123

BS 951 clamps on a lead sheathed supply cable is a definite no no. A code 2 for sure, recommend the installation of an earthing terminal or re-routing to the DB.
 

jase

Electrician's Arms
if the 16mm to the board is comming of the cutout that sounds like tnc-s not tns, and that makes me wonder why the earth bonds are clamped to the sheath ????
deffo fit an MET
 

telectrix

Scouser and Proud of It
Respected Member
thinking that myself. first thing to do is determine whether it's TN-S or TNC-S, or even a DIY attempt at PME.
 

stonejenson

EF Member
Hi there - just an additional query of my own... I live in an old place and want to upgrade my DBs, so am in process of sorting out stuff, like taking sockets I discovered connected to lighting circuits off and re-wiring to a proper ring etc. Main services earth connection.. did the gas yesterday, now trying to figure out how/where to get to my water main, and only routes I can do will take my 10mm earth cable outside. Now if it was a live cable, I would do it in conduit/trunking without doubt, but would it stand up to the elements without protection? It will be out of harms way, but can I just clip it? Will it deteriorate? Having trouble getting a precise answer on this.
 

telectrix

Scouser and Proud of It
Respected Member
Hi there - just an additional query of my own... I live in an old place and want to upgrade my DBs, so am in process of sorting out stuff, like taking sockets I discovered connected to lighting circuits off and re-wiring to a proper ring etc. Main services earth connection.. did the gas yesterday, now trying to figure out how/where to get to my water main, and only routes I can do will take my 10mm earth cable outside. Now if it was a live cable, I would do it in conduit/trunking without doubt, but would it stand up to the elements without protection? It will be out of harms way, but can I just clip it? Will it deteriorate? Having trouble getting a precise answer on this.
have seen it just clipped, but would be better run in 20mm pvc conduit.
 
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