ELECTRICAL SAFETY
Current greater than 75 mA cause:
Ventricular fibrillation (very rapid, ineffective heartbeat).
Prevent exposure to live ____ and ____ by using _____.
Wire Parts Insulation
Use proper ____ and ____.
Wiring Connectors.
Take time to plan your ____ and plan for ____.
Work Safety.
When a _______, ______, or _____ is energized, a potential shock hazard is present.
Circuit Electrical Component Equipment
Current flow through the body of________ or less can be fatal.
0.015 ampere.
Electrocution is the cause of _______ of all workplace deaths. Among young workers aged ________, causing an average of _____ per year.
7% 16-19 10 deaths
Ground
A physical electrical connection to the earth.
Energized (Live, "hot")
A voltage is present that can cause a current. so there is possibility of getting shocked.
AWG
American Wire Gauge- A measure of wire size.
the danger from electrical shock depends on ___,___ and____ of the shocking current through the body.
Amount Duration Path
If there is a small electrical fire, be sure to use only a_____ or _____ fire extinguisher.
Class C Multipurpose (ABC)
Steps to control hazards:
Create a safe workplace Work safely.
Electricity is Dangerous, coming in contact with an electrical voltage can cause ____________, resulting in _________.
Current to flow through the body Electrical shock and burns.
Prevent against ______ or ______ when working live by using proper ____ and _____.
Electric shock Arc blast PPE (Personal protective equipment) Protective tools.
Burns are the most common injury caused by electricity. the three types of burns are:
Electrical burns Arc burns, and thermal contact burns.
An electrical shock is received when ________.
Electrical current passes through the body.
Control contact with_____ and control ____ to create a safe work environment.
Electrical voltage Electrical currents.
There are four main types of electrical injuries:
Electrocution (death due to electrical shock), Electrical shock Burns and Falls
Black and red wires are usually ______, and white wires are usually _____.
Energized Neutral
Prevent _____ to live electrical parts by _____ them
Exposure Isolating
Prevent shocking currents by using _____.
GFCIs.
GFCI
Ground fault circuit interrupter- A device that detects current leakage from a circuit to ground and shuts the current off.
Never use a Three-prong grounding plug with the __________.
Ground prong broken off.
Metal electrical boxes should be ______ to prevent _____.
Grounded Shocks
Electrical shocks, fires or falls result from these hazards:
Inadequate wiring Exposed electrical parts Overhead power lines Defective insulation Improper grounding Overloaded circuits Wet conditions Damaged tools and equipment Improper PPE
Electrical shock may cause _______ or ______.
Injury Death
_____ and _____ circuits and machines.
Lock out Tag out.
You can prevent injuries and deaths by remembering the following points:
Make sure the circuit is de-energized (shut off). Never touch with the wires or conductors. Lock out and tag out circuits. Always assume a conductor is dangerous.
NEC
National electrical code: A comprehensive listing of practices to protect workers and equipment from electrical hazards such as fire and electrocution.
OSHA
Occupational safety and health administration- The federal agency in the U.S. Department of labor that establishes and enforces workplace safety and health regulations.
Avoid _____ power lines.
Overhead.
Prevent ______ by using the right size and type of ____
Overloaded wiring Wire
PPE
Personal protective equipment (Eye protection, hard hat, special clothing, etc.)
The three stages of the safety model are ____,____ and ____.
Recognize hazards (Identify) Evaluate hazards (Evaluate your risk) Control hazards (Take steps to control hazards).
One of the most important things that a service technician must know:
Safety
Prevent _______ from electrical systems and tools by _____.
Shocking currents Grounding
Always ______ to make sure it is _____ before working on it.
Test a circuit. De-energize
Electrical grounding
The ground wire.
Any of these conditions or "Clues", tell you something important:
There is a risk of fire and electrical shock The equipment or tools involved must be taken out of service.
Prevent ______ in circuits by using ______ protection devices.
Too much current Overcurrent.
Use and maintain _____.
Tools properly.
Never _____ a person who is in contact with an electrical source
Touch
You will receive a shock if you _____ and are _____ at same time.
Touch a live wire Grounded
You will receive a shock if you _______ at ______ at _____.
Touch two wires Different voltage The same time
Avoid ____ working conditions and other dangers.
wet.