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​Schedule of accuracies for metering equipment

Schedule of accuracies for metering equipment approved under section 9(1) of the electricity and gas inspection act

Metering point capacity (MVA)

Watt hour meter accuracy class

Var hour meter accuracy class

Measurement transformers accuracy class
10 and above 0.2% 0.5% 0.3%
Below 10 0.5% 1.0% 0.3%


The columns apply to requirements set out in this guideline under Metering sections 2.2 and 2.3.

If an alternate measurement is used to determine reactive energy, the accuracy class of the alternate measurement must be equal to or better than the accuracy class set out for reactive energy.