When live wires are improperly connected to the ground or metal body of devices, electrical systems can create hazards in the form of step and contact voltage. Step voltage refers to the voltage difference between two feet separated by one meter in electrical substations, while contact voltage is the potential difference between a person’s hand and feet. Contact voltage is more hazardous than step voltage since the current may flow through the individual’s heart area. Reducing these risks involves utilizing insulated gloves and shoes, walking in a specific manner, and determining the resistance between two feet through a ground resistance measuring device. The step and contact voltage can be determined using Ohm’s law.
Bench Multimeters