Electricity: The Basics

What effect do shocks have on the body?

• the amount of current flowing through the body

• the current’s path through the body,

• the length of time the body remains in the circuit,

• the current’s frequency

• A,B,C,&D

Shocks occur when a person’s body completes the current path with:

• both wires of an electric circuit

• one wire of an energized circuit and the ground

• a metal part that accidentally becomes energized due, for example, to a break in its insulation

• another “conductor” that is carrying a current.

• A,B,C,&D

What is the effect of 75 mA on the human body

• Extreme pain, respiratory arrest, severe muscular contractions. Death is possible.

• Cardiac arrest, severe burns; death probable

• Painful shock, loss of muscular control*

• Faint tingle

Most electrical accidents result from

• unsafe equipment or installation

• unsafe environment

• unsafe work practices

• A,B,&C

What work practices help protect you against electrical hazards?

• de-energizing electric equipment before inspection or repair

• keeping electric tools properly maintained,

• exercising caution when working near energized lines.

• using appropriate protective equipment.

• A,B,C&D

When working on electrical equipment, for example, some basic procedures to follow are to:

• de-energize the equipment

• use lockout and tag procedures to ensure that the equipment remains de-energized

• use insulating protective equipment

• maintain a safe distance from energized parts

• A,B,C&D

What kind of burns can a shock cause?

• Electrical burns

• Arc/Flash burns

• Thermal contact burns

• A,B,&C