 Over 400 deaths occur annually from electric shock  Half of all deaths occur with low voltage outlets  On the job site, one death per day and arc flashes

 Amperes: measure of the rate of flow of electricity in a conductor  Volts: measure of electrical pressure  Watts: measure of the amount of energy or work that can be done  Ohms: measure of electrical resistance to flow

Thus, the following relationship exists. Work = Pressure x Flow Or Watts = Volts x Amperes

 Ohm = R  Volts = E  Amps = I  Ohm’s Law: E = IR I=E/R R=E/I *Image from :

This formula is commonly referred to as the West Virginia Formula W=VA When we know any two variables of the formula, we can calculate the other.

Watts = Volts x Amps Volts = Watts / Amps Amps = Watts / Volts

If we have a 100 watt lamp plugged into a 120 volt receptacle, we can determine the rate of flow or the amperes for that circuit. Amps = 100 Watts / 120 Volts 100 / 120 =.833 Amps

If a water heater operates at 20 amps on a 240 volt circuit, what is the wattage of the appliance? Watts = 240 Volts x 20 Amps 4800 Watts =240V x 20A Watts=4800

If an electric motor operates at 2880 watts and 12 amps, what would be the voltage requirement for that motor? Volts = 2880 Watts / 12 Amps 2880 / 12 = 240 Volts