Nope, it is the size of the circuit protective conductor for mechanically protected exposed to exposed conductive parts.paulh53 said:Minimum supp' bond is 2.5mm2 when mechanically protected,
kai said:Further more I'll always cross bond with 2.5.mm. any twin economy seven immersion heater control switch set up - i.e. where there is a daytime boost and nighttime off peak circuit, the two 13amp FCU's earth terminals are cross bonded to one another behind the faceplates.
Spark123 said:Nope, it is the size of the circuit protective conductor for mechanically protected exposed to exposed conductive parts.paulh53 said:Minimum supp' bond is 2.5mm2 when mechanically protected,
I didn't really consider this topic about supplementary bonding.
ban-all-sheds said:Supplementary bonding is what is applied to extraneous-conductive-parts in some locations.
Back boxes are not extraneous-conductive-parts, therefore any bonding conductors are not supplementary ones.
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