I don't believe that BS7671 allows you to determine the size of THIS conductor by calculation.As the regs only refer to calculating the main bbonding conductors.
Agreed?
OK I see that - I needed to check the definition of Earthing COnductor first though so if it results in less that 6mm, would you be content to leave a 6mm Earthing Conductor or would you upgrade and if so why
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