Another bonding question

[Essex]

The bonding from the MET is run externally, 10mm cable clipped to the brickwork all the way to the gas meter (about 12 meters).

Should this cable at least be ran in conduit or upgraded to 16mm?.

Would it be down to me to get this rectified?

Thanks

 

[Sidewinder]

Essex,

Is the resistance OK?

Is the wire damaged?

Is it susceptible to damage?

Does it need to be upgraded, what is the incomer?

Why are you thinking it needs 16mm?

HTH

 

[wozz]

Ive done it but ive never liked it, how long before the copper thieves start targeting bonding runs? After all on old estates most house if bonded would be bonded in the same way! I havnt heard of it happening yet though. A house down the road to me has galv conduit running externally to a meter box, it impresses me slightly.

 

[batty]

David only need to worry if its likely to get damaged or pinched the second more likely these days.

 

[Essex]

Essex,Is the resistance OK? Didn't check as I did not have my wonderlead with me.

Is the wire damaged? No

Is it susceptible to damage? Only to the elements

Does it need to be upgraded, what is the incomer?16mm tails and 16mm earth 60A main fuse

Why are you thinking it needs 16mm? Isn't written somewhere if the cable is not protected, you have to use next size up!!

HTH

Answers in red

Thanks.

 

[SPECIAL LOCATION]

A copper conductor with a green/yellow sheath IS protected!..

Consider table 54.8 page 134...

MINIMUM cross sectional area of protective bonding conductor in relation to neutral CSA.

Or on a similar vien...

consider the requirements for a buried earth conductor....

Table 54.1 pg 127..

the main earth only needs to be 16mm if its not mechanically protected..

otherwise it can be 10mm!

So as a general rule the bondings don't do more than the main earth does.

10mm outside with a sheath is all OK.. :Salute

as wozz says... biggest danger is someone nicking it!!!! :| :C

---------- Post Auto-Merged at 01:02 ---------- Previous post was made at 01:01 ----------

Ive done it but ive never liked it, how long before the copper thieves start targeting bonding runs? After all on old estates most house if bonded would be bonded in the same way! I havnt heard of it happening yet though. A house down the road to me has galv conduit running externally to a meter box, it impresses me slightly.

Had to do a job 18months back replacing a stolen bonding wire.

 

[Essex]

Thanks guys.

Just one more thing, is there any reason why you cannot use the existing air bricks to run your cables.

Thanks

 

[rainydays]

I presume that you mean running your cable through an airbrick. Apart from the fact that it looks as rough as, i do not believe that one cable would prevent the free flow of air to pass through. It could possibly be argued that you are using something for a purpose that it was not designed for. Prevention of mutual detrimental influence, and all that.

 

[fletchflash]

Theres no problem with bonding outside or run through an air brick. Single insulated is protected.

I try to avoid doing it coz i think it looks crap. I hate having to spend time clipping it straight and to try and not get the G&Y too twisted, making it looking even more crap. I do reckon that galv conduit would look even worse- its a bit 'factory chic'

If customer got laminate floors etc its only way to go is outside.