Electrical Safety Risk Assessment (Page 4 of 6) in pdf

Electrical Safety Risk Assessment Page 4

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What is the ampere rating of the CB involved?

4. Likelihood of Avoiding or Limiting Injury or Damage to Health (Av) – This parameter can be estimated by taking

into account aspects of the electrical system design and its intended application that can help to avoid or limit the

injury or damage to health from a hazard, including the following examples:

a. Sudden or gradual appearance of the hazardous event; for example, an explosion caused by high fault

values under short-circuit conditions.

b. Spatial possibility to withdraw from the hazard.

c. Nature of the component or system; for example, the use of touch-safe components, which reduce the

likelihood of contact with energized parts. Working in close proximity to high voltage can increase the

likelihood of personnel being exposed to hazards due to approach to live parts.

d. Likelihood of recognition of hazard; for example, as an electrical hazard, a copper bar does not change it

appearance, whether it is under voltage or not. To recognize the presence of the hazard, an instrument is

needed to establish whether or not electrical equipment is energized; thus both inadvertent and intentional

contact need to be considered.

Select the appropriate value for Likelihood of Avoiding or Limiting Injury or Damage to Health (Av) from the

Table 4. Add the value to the Risk Register (Table 5).

Likelihood of Avoiding or Limiting Injury or Damage to Health

Av Value

Impossible

Rare

Probable

Table 4

Risk Register – Enter Values from Tables 1, 2, 3 & 4.

Scenario

Hazard

Severity

Probability of Occurrence of Harm

Risk Score

No.

Po = (Fr+Pr+Av)

(R)

Total

Se x Po

Table 5

A Risk Score (R) higher than 10 requires consideration of additional safety controls.

Electrical Safety Risk Assessment Page 4