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Regulation 6 Multiple earthing

Changes not yet applied. Later legislation changes this provision in ways not yet written into the text below:

  • reg.3(1) (defn of British Standard Requirements) added reg.3(1) (defn of Institution Electrical Engineers Regs) revoked by Electricity Supply 1992 reg.2(a) of SI 2961, reg.2(b)

The supplier may connect the supply neutral conductor of a distributing main with earth at places in addition to that required by regulation 5(2) if, and only if, the copper equivalent cross-sectional area of the supply neutral conductor—

(a)

when measured anywhere in a three-phase four wire, two-phase three wire or single-phase three wire distributing main is not less than one half of the copper equivalent cross-Sectional area of the phase conductor at the same point; or

(b)

when measured anywhere in a single-phase two wire distributing main is not less than the copper equivalent cross-sectional area of the phase conductor at the same point,

and in either case is such that it is capable of carrying such loads as may reasonably be expected to occur.