Electrical Safety Tool Box Talk 1
WHAT IS ELECTRICITY?
- Voltage – electrical pressure (water pressure)
- Resistance – restriction to electrical flow (pipe friction)
- Amperes – electrical flow rate (gallons/min)
- Watts – amount used
AMPS = VOLTAGE AMPS = WATTS
THE HAZARDS OF ELECTRICITY
- Electrical current travels in closed circuits.
- You get a shock when some part of your body becomes part of an electric circuit.
- An electric current enters the body at one point and exits the body at another.
- Arcing or sparking
- Arcing or sparking occurs when high-amperage currents jump from one conductor to another.
- Explosions occur when electricity provides a source of ignition for an explosive mixture in the atmosphere.
- Electricity is one of the most common causes of fire.
THE SEVERITY OF SHOCK A PERSON CAN RECEIVE DEPENDS ON:
- Quantity (Amperes) of current through the body
- >3 mA – Indirect accident.
- >10mA – Muscle contraction.
- >30mA – Lung paralysis, usually temporary.
- >50mA – Possible ventricular fibrillation(fatal).
- 100mA to 4A – Certain ventricular fibrillation.
- >4A – Heart paralysis, severe burns.
- Path of current through the body
- Length of time the body is in the circuit
SAFETY REMINDERS – ALL TEMPORARY POWER MUST BE PROTECTED BY GFCI AND ASSUME ALL ELECTRICAL OUTLETS AND CORDS ARE LIVE UNTIL PROVEN OTHERWISE