27 Questions
What is the purpose of an electric shock risk assessment according to the given text?
To identify electric shock hazards and estimate the likelihood and severity of injury
What factors should be considered when estimating the likelihood and severity of injury or damage to health?
The design of the electrical equipment and its operating condition
When additional protective measures are required, what should be determined if the use of PPE is included?
The voltage to which personnel will be exposed and the boundary requirements
What is required in terms of documentation for the results of an electric shock risk assessment?
The results should be documented
What are the two electric shock protection boundaries identified in the text?
Limited approach boundary and restricted approach boundary
Who is permitted to approach nearer than the limited approach boundary of energized conductors and circuit parts?
Unqualified persons only
What method should be applied to warn unqualified persons of the electrical hazard when they are working at or close to the limited approach boundary?
130.8(O)
Under what circumstances are unqualified persons permitted to cross the limited approach boundary?
They can cross if they are escorted by a qualified person
What is the restricted approach boundary based on?
Table 130.4(E)(b) for dc system voltages
When can a qualified person approach closer to exposed energized electrical conductors or circuit parts than the restricted approach boundary?
When insulated or guarded from the energized parts
What are considered insulation with regard to the energized parts upon which work is performed?
$130.4(D)$
Under what condition can a qualified person take any conductive object closer to exposed energized electrical conductors or circuit parts than the restricted approach boundary?
$130.4(G)(1)$ applies
What is the first step in establishing and verifying an electrically safe work condition?
Determine all possible sources of electrical supply to the specific equipment
What should be visually verified after properly interrupting the load current?
That all blades of the disconnecting devices are fully open
What is the purpose of applying lockout/tagout devices in accordance with a documented and established procedure?
To prevent unintentional energization of circuit parts
What should be tested at each point of work to test for the absence of voltage?
Each phase conductor or circuit part both phase-to-phase and phase-to-ground
What is the purpose of using an adequately rated permanently mounted absence of voltage tester?
To test for the absence of voltage at the work location
What is a requirement for the use of a noncontact capacitive test instrument on electrical systems over 1000 volts?
It must be listed and labeled for the purpose of testing for the absence of voltage
What should be done where the possibility of induced voltages or stored electrical energy exists?
Ground all circuit conductors and circuit parts before touching them
What should temporary protective grounding equipment be capable of conducting?
The maximum fault current that could flow at the point of grounding
What is required in terms of documentation for the results of an electric shock risk assessment?
Documentation as part of the employer’s job planning
Under what condition can a qualified person approach closer to exposed energized electrical conductors or circuit parts than the restricted approach boundary?
When wearing proper Personal Protective Equipment (PPE)
What boundary is based on the limited approach distance?
Restricted approach boundary
Who is permitted to approach nearer than the limited approach boundary of energized conductors and circuit parts?
No one
When estimating the likelihood and severity of injury or damage to health, what factors should be considered?
Both likelihood and severity of injury or damage to health
What should be determined if additional protective measures are required?
Whether PPE is included in the job planning
What method should be applied to warn unqualified persons of the electrical hazard when they are working at or close to the limited approach boundary?
A combination of oral and visual methods
Test your knowledge of electric shock risk assessment, including identifying hazards, estimating likelihood of injury, and determining protective measures.
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