bondings on a tt

[paul b b]

Hello chaps,

can i just confirm the size of bondings on a tt system.

thanks

 

[Andy™]

2.5 iirc, but its common practice to install 6mm

 

[Adrian]

main 2.5 protected 6mm not protected (as far as I can remember)

water gas ect half the size of main or minium 6mm

 

[binky]

Min allowed is 6mm - many years ago I calculated size with help of NICEIC helpline, we worked out 0.24mm would have been adequate, but have to use 6mm.