Morning,

During one of my investigations behind the kitchen sink, I found that the
earth bonding wires to the water pipe were detached (I blame the plumber).

I checked all bonding points and found that:

Earth bonding to gas, water and central heating is done with 10mm^s.
This connects to a block under the CU, and then via 10mm^2 to the earth
bar in the CU.

The supply (TN-C-S, I think) uses 10mm^2 earth and 16mm^2 L&N.
I was expecting these to all be one size fatter (16mm^2 earth and 25mm^2 L&N),
but maybe this is enough for a supply fused at 60A.

Does this sound compliant with current regs?

Gerd.



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On Wed, 15 Jun 2005 09:58:40 +0100, Gerd Busker
wrote:

Morning,

During one of my investigations behind the kitchen sink, I found that the
earth bonding wires to the water pipe were detached (I blame the plumber).

I checked all bonding points and found that:

Earth bonding to gas, water and central heating is done with 10mm^s.
This connects to a block under the CU, and then via 10mm^2 to the earth
bar in the CU.

The supply (TN-C-S, I think) uses 10mm^2 earth and 16mm^2 L&N.
I was expecting these to all be one size fatter (16mm^2 earth and 25mm^2 L&N),
but maybe this is enough for a supply fused at 60A.

Does this sound compliant with current regs?

Does it say on the suppliers fuse that it is a 60 amp fuse or a 100
amp fuse?

Is it a re-wirable by any chance?

J

Gerd Busker wrote:

I checked all bonding points and found that:

Earth bonding to gas, water and central heating is done with 10mm^s.
This connects to a block under the CU, and then via 10mm^2 to the earth
bar in the CU.

The supply (TN-C-S, I think) uses 10mm^2 earth and 16mm^2 L&N.
I was expecting these to all be one size fatter (16mm^2 earth and 25mm^2 L&N),
but maybe this is enough for a supply fused at 60A.

16mm is plenty for a 60A supply.

Does this sound compliant with current regs?

I don't have my On-Site guide handy, but from memory that sounds right
for a PME system.


--
Cheers,

John.

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