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A consumer's bill is dominated by the demand charge though its consumption is modest. The measure with the largest effect is

  • A.shifting consumption to off-peak hours
  • B.changing to a supply at a lower voltage
  • C.reducing the maximum demand
  • D.reducing the units consumed

Answer: C

Correct answer: reducing the maximum demand

If the demand charge dominates, that is where the money is, and it depends on the highest half-hour average rather than on total consumption. Staggering the starting of large motors, avoiding coincident operation and improving the power factor all cut the peak without cutting output. Reducing units consumed attacks the smaller half of the bill.

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