- Electric Power is calculated by multiplying the current by the supply voltage:

- P (watts) = V (volts) x I (amps)

- The $64 million dollar fact to remember from the previous slide is that
the current is also influenced by voltagefor most ordinary loads

- Therefore the customer's electric power consumption for many typical household and office loads is proportional to the square of the supply voltage.

- Mathematically this is written P V
^{2}

- Thus for many ordinary electrical loads, a six percent increase in voltage above 240 volts will by the application of Ohm's Law inevitably lead to a 12.4 per cent rise in the power consumption of the load.

How Voltage affects Electrical Energy Consumption