To measure the maximum rate at which electricity was used and can be measured as kW, kVA, kVAR, we use _____________.

• A. Demand metering
• B. Transformer-rated metering
• C. Primary metering
• D. Self-contained metering

Answer: (A)

Peak demand is what demand metering tracks. It records the highest average power used over defined time intervals, typically 15, 30, or 60 minutes, and reports it in kW (real power), kVA (apparent power), or kVAR (reactive power). Utilities use this peak value for demand charges and to size equipment and circuits, since it reflects the maximum rate at which electricity is consumed rather than just total energy over a period.

Other installation-focused terms don’t specifically describe capturing that peak rate. Transformer-rated metering relates to monitoring loading relative to transformer limits, not the general concept of peak usage. Primary metering and self-contained metering refer to where and how the meter is installed or enclosed, rather than the function of measuring maximum demand.