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Course 715 - Electrical Safety for Technicians & Supervisors

Safety guides and audits to make your job as a safety professional easier

The Electrical Safety Model

Report hazards to your supervisor or trainer
The Electrical Safety Model is a 3-step process.

Three Step Process

To make sure all employees are safe before, during and after electrical work is performed, electrical workers should follow the three-step process of the Electrical Safety Model:

  1. recognize hazards
  2. evaluate risk
  3. control hazards

To be safe, you must think about your job and plan for hazards. To avoid injury or death, you must understand and recognize hazards. You need to evaluate the situation you are in and assess your risks. You need to control hazards by creating a safe work environment, by using safe work practices, and by reporting hazards to a supervisor or trainer.

If you do not recognize, evaluate, and control hazards, you may be injured or killed by the electricity itself, electrical fires, or falls. If you use the safety model to recognize, evaluate, and control hazards, you will be much safer at work.

Use the safety model to:

  • Recognize, evaluate, and control hazards.
  • Identify electrical hazards.
  • Don't listen to reckless, dangerous people.
  • Evaluate your risk.
  • Take steps to control hazards

1. Each of the following is one of the steps in the Electrical Safety Model EXCEPT _____.

a. recognizing hazards
b. organizing hazards
c. evaluating risk
d. controlling hazards

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1. Recognize hazards

Report hazards to your supervisor or trainer
If you recognize a hazard, report it.

The first step of the electrical safety model is recognizing the electrical hazards around you. Only then can you avoid or control the hazards. It is best to discuss and plan hazard recognition tasks with your co-workers.

The most frequent causes of electrical injury/death are:
  • Contact with power lines
  • Lack of ground-fault protection
  • Path to ground missing or discontinuous
  • Equipment not used in manner prescribed
  • Improper use of extension and flexible cords

Sometimes we take risks ourselves, but when we are responsible for others, we are more careful. Sometimes others see hazards that we overlook. Of course, it is possible to be talked out of our concerns by someone who is reckless or dangerous. Don't take a chance.

Careful planning of safety procedures reduces the risk of injury. Decisions to lock out and tag out circuits and equipment need to be made during this part of the safety model. Plans for action must be made now.

2. Before you can avoid and control electrical hazards you must first _____.

a. recognize them
b. mitigate them
c. list them
d. understand them

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riskanalysis
Evaluating Electrical Risks
Click to enlarge.

2. Evaluate Risks

Evaluation is a judgment call, and it's based on the perceived level of risk of injury. Risk is determined by analyzing the probability of an injury occurring and the severity of the injury if it occurs. The greater the probability and higher the severity, the greater the risk.

When evaluating risk, it is best to identify all possible hazards first, then evaluate the risk of injury from each hazard. Do not assume the risk is low until you evaluate the hazard. It is dangerous to overlook hazards.

Job sites are especially dangerous because they are always changing in construction and electrical work. Many people are working at different tasks and job sites are frequently exposed to bad weather. A reasonable place to work on a bright, sunny day might be very hazardous in the rain. The risks in your work environment need to be evaluated all the time. Then, whatever hazards are present need to be controlled.

3. Risk is determined by analyzing which two factors?

a. Awareness and likelihood
b. Probability and awareness
c. Severity and distance
d. Probability and severity

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3. Control hazards

Once electrical hazards have been recognized and evaluated, they must be controlled. You control electrical hazards in two main ways:

  1. create a safe work environment and
  2. use safe work practices.

One way to implement this safety model is to conduct a job hazard analysis (JHA). This involves development of a chart:

  • Column 1, breaking down the job into its separate task or steps;
  • Column 2, evaluating the hazard(s) of each task, and
  • Column 3, developing a control for each hazard. See the example below.

JHA: Changing a Wall Ground Fault Circuit Interrupter (GFCI)

Task Analysis Hazard Analysis Hazard Abatement
Removing the cover Electric shock from exposed live wires De-energize by opening circuit breaker or removing fuse
Removing old GFCI Possible other live wires in opening Test wires with appropriate voltmeter to ensure all wires are de-energized
Installing new GFCI Possible connecting wires incorrectly Check wiring diagrams to ensure proper connections
Replace cover and re-energize Possible defective GFCI Test GFCI

4. Once electrical hazards have been recognized and evaluated, they must be _____.

a. reported
b. controlled
c. managed
d. removed

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Helpful Information

photo23
Use the safety module to recognize, evaluate, and control workplace hazards like those in this photo.

Controlling electrical hazards (as well as other hazards) reduces the risk of injury or death.

OSHA regulations, the NEC, and the National Electrical Safety Code (NESC) provide a wide range of safety information. Although these sources may be difficult to read and understand at first, with practice they can become very useful tools to help you recognize unsafe conditions and practices.

Knowledge of OSHA standards is an important part of training for electrical apprentices. Check out the following OSHA publications for more information:

5. Electrical safety training should include which of the following topics for apprentices?

a. NIOSH research studies
b. MSHA regulations
c. OSHA standards
d. ANSI standards

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Case Study

A maintenance man rode 12 feet above the floor on a motorized lift to work on a 277-volt light fixture. He did not turn off the power supply to the lights. He removed the line fuse from the black wire, which he thought was the "hot" wire. But, because of a mistake in installation, it turned out that the white wire was the "hot" wire, not the black one. The black wire was neutral. He began to strip the white wire using a wire stripper in his right hand.

Electricity passed from the "hot" white wire to the stripper, then into his hand and through his body, and then to the ground through his left index finger.

A co-worker heard a noise and saw the victim lying face up on the lift. She immediately summoned another worker who lowered the platform. CPR was performed, but the maintenance man could not be saved. He was pronounced dead at the scene.

You can prevent injuries and deaths by remembering the following points:

  • If you work on an electrical circuit, test to make sure that the circuit is de-energized (shut off)!
  • Never attempt to handle any wires or conductors until you are absolutely positive that their electrical supply has been shut off.
  • Be sure to lock out and tag out circuits so they cannot be re-energized.
  • Always assume a conductor is dangerous.

6. Which of the following is a safe work practice when working with electricity?

a. It is safe to work on live low-voltage circuits
b. Assume you are safe if properly grounded
c. It's safe to work with circuits after switching the equipment off
d. Always assume a conductor is dangerous

Check your Work

Read the material in each section to find the correct answer to each quiz question. After answering all the questions, click on the "Check Quiz Answers" button to grade your quiz and see your score. You will receive a message if you forgot to answer one of the questions. After clicking the button, the questions you missed will be listed below. You can correct any missed questions and check your answers again.

Video

Electrical Safety for Non-Electricians

When your team works in electrical environments, they need to have full knowledge of safety rules. This is vital, not only for workers but also for the safety of employees supervised. We have developed an e-Learning solution that allows your team to check and improve safety knowledge. Your company will detect if there are any safety knowledge gaps and take efficient training corrective actions. Source: Schneider Electric.

A bright arc: A video guide to powerline safety

This WorkSafeBC video deals with the dangers of working near overhead and underground powerlines. Dramatic footage and computer animation show what can happen if you or someone on your job site accidentally contacts an energized powerline.

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