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ELECTRICAL SAFETY RISK ASSESSMENT

The intent of this procedure is to perform a risk assessment, which includes a review of the electrical hazards, the

associated foreseeable tasks, and the protective measures that are required in order to maintain a tolerable level of risk. A

risk assessment should be performed before work is started.

Risk Assessment Steps

1. Identify the electrical hazards associated with the task and the electrical system, or electrical process involved

(example: shock hazard risk; arc flash hazard risk).

2. Identify the electrical work to be performed within the electrical system or process.

3. Define the possible failure modes that result in exposure to electrical hazards and the potential resultant harm.

4. Assess the severity of the potential injury from the electrical hazards.

5. Determine the likelihood of the occurrence for each hazard.

6. Define the level of risk for the associated hazard.

7. If the level of risk is not acceptable, identify the additional measures or corrective actions to be taken. Example:

wear appropriate PPE and if the risk too great, do not perform the task.

The risk related to an identified hazard may be thought of as being composed of the severity of the injury and the

likelihood of occurrence of that injury.

Figure 1 Elements of Risk

Risk Assessment Calculation

Following are two examples of methods that can be used to conduct electrical risk assessments.

In the first, The Risk Register Method, the risk is derived using the risk parameters as shown in Figure 1.

In the second, the risk is derived from using a Risk Assessment Matrix as shown in Figure 2.

Risk Register Method:

1. Severity of the Possible Injury or Damage to Health (Se) – Severity of injuries or damage to health can be

estimated by taking into account reversible injuries, irreversible injuries, and death. Typically, the types of

hazards to be considered include, but are not limited to, shock and electrocution, burns, and impact. Choose the

appropriate Severity value from Table 1 below. Add value to the Risk Register (Table 5)

Severity of Injury of Damage to Health

Se Value

Irreversible – trauma, death.

Permanent – skeletal damage, blindness, hearing loss, third degree burns.

Reversible – minor impact, hearing damage, second degree burns.

Reversible – minor laceration, bruises, first degree burns.

Table 1

Electrical Safety Risk Assessment