Cross bonding Boiler pipework within a kitchen what conductor size do I requirement? Hi Guys, I'm cross bonding some metal pipes coming out of a...

Hi Guys, I'm cross bonding some metal pipes coming out of a boiler I just need to know what what floor conductor size i need to use?? the main equipotential bonding near the gas and water mains is done but these for some principle havn't been done. anyone know

Thanks in credit
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10mm
Closet Solution?
use the same size as the rest
For inside my house, is it possible to...
BS7671 say 2.5mm. If you do it, you should take the bonding into the cpc of local circuit supplying the boiler too.

NICEIC sez 4mm
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Answers:    4mm G/Y single earth cable + earth clamps
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Water contained by itself is one of the best conductors of electricity, and it definitely goes directly to ground, why would hose lines need to be grounded or bonded? Run in metal pipes also does their own bonding to soil.