Draining combi system

[doyle]

try cross bonding the pipes so when the seriously hoit water on the central heating side melts through that 3 amp fused cable and make the entire system go live.

 

[AndyBill]

try cross bonding the pipes so when the seriously hoit water on the central heating side melts through that 3 amp fused cable and make the entire system go live.

oh should the cable be in front of the pipes then?

 

[gas4you]

The flex shouldbe 'heat resistant' as it goes into the boiler anyway. This is rated at 85C.

 

[AndyBill]

The flex shouldbe 'heat resistant' as it goes into the boiler anyway. This is rated at 85C.

my cable might be heat resistant

 

[gas4you]

White wire is flex, cable is grey flat that does ring main etc.

 

[AndyBill]

there is an earth cable on the mains water pipe where the stopcock is,
if i cross bond all the pipes under the boiler together will this be sufficient?

what dia cable would i use?

and should i include the discharge pipe?

is there such a thing as 'too much earth bonding'?

ditto

 

[gas4you]

Yes it will be sufficient. The minimum size you can use at present is 4mm. I always use 10mm as I am too tight to buy several different sizes of earth wire, and 10mm covers all possible applications that I need it for

 

[AndyBill]

thanks mate

 

[doyle]

would have been better to keep it all in one thread mate