Basics
of
Electrical Safety
1
, Introduction
• An average of one worker is electrocuted on the
job every day
• There are four main types of electrical injuries:
Electrocution (death due to electrical shock)
Electrical shock
Burns
Falls
2
, Electrical Terminology
• Current – the movement of electrical charge
• Resistance – opposition to current flow
• Voltage – a measure of electrical force
• Conductors – substances, such as metals, that
have little resistance to electricity
• Insulators – substances, such as wood, rubber,
glass, and bakelite, that have high resistance to
electricity
• Grounding – a conductive connection to the earth
which acts as a protective measure
3
of
Electrical Safety
1
, Introduction
• An average of one worker is electrocuted on the
job every day
• There are four main types of electrical injuries:
Electrocution (death due to electrical shock)
Electrical shock
Burns
Falls
2
, Electrical Terminology
• Current – the movement of electrical charge
• Resistance – opposition to current flow
• Voltage – a measure of electrical force
• Conductors – substances, such as metals, that
have little resistance to electricity
• Insulators – substances, such as wood, rubber,
glass, and bakelite, that have high resistance to
electricity
• Grounding – a conductive connection to the earth
which acts as a protective measure
3
