Main Bonding to Hot Tank Cupboard

[CathalX]

I have run a 10mm earth cable cable from board to hot hot tank cupboard and have looped across all pipework with 10mm loops. This is correct isn't it???

 

[Big_Spark]

Now that is what I call overkill..

The cable used is a "bit OTT" but it is safe to say you have certainly achieved the aim of cross bonding

 

[andy]

Now that is what I call overkill..

The cable used is a "bit OTT" but it is safe to say you have certainly achieved the aim of cross bonding

usually, 4mm is used, but 10 is OK

 

[CathalX]

Is the 10mm back to board OTT or the cross bonding between heating pipes over doing it. I have observed 10mm cross bonding in heating cupboards on several occasions and followed a logic that the return to board would be of the same dimensions

 

[nigeld]

Depends on type of supply-pme(or whatever its called now) requires 10mm.No harm in using 10mm just cost.

 

[Big_Spark]

Is the 10mm back to board OTT or the cross bonding between heating pipes over doing it. I have observed 10mm cross bonding in heating cupboards on several occasions and followed a logic that the return to board would be of the same dimensions

The problem it that your in Eire, and the rules are somewhat different over there. I can imagine that if your in a rural location with a TT (Overhead) supply then perhaps the 10mm link to the board is a requirement, however I have never seen 10mm used fro cross bonding even in severe industrial environments.

 

[Lectrician]

And there is no direct requirement to cross bond in the A/C, just the bathroom!

 

[kai]

To be safe, if you have an immersion heater in the cylinder, you should really bond all the airing cupboard metalwork and vent pipe etc, with appropriate cable (not less than 4.0.sq.mm.), and ensure it's run straight back to the Main Consumer Unit's earthing terminal, and Tested after.

Not always demanded by BS7671:2001, but it is wise to be safe as water and electricity do not mix well.