Also 10mm bonding cable is restricted to about 27 mts for MET to gas meter, bigger distance need bigger cable.
Although I can't currently find it in either regs or OSG, I'm sure I've read that the maximum permissible resistance is 50mΩ (i.e. 0.05Ω
, but with 10mm² cable having a resistance of about 2.2mΩ per metre, that would imply a maximum of about 22.7m. can you tell me where your 27m figure come from? Thanks.