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bondings on a tt


paul b b

Question

paul b b

Hello chaps,

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

thanks

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3 answers to this question

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Andy™

2.5 iirc, but its common practice to install 6mm

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

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

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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.

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