- 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 voltage for 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
V2
- 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