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Which of the following approach boundaries is not established for shock protection?
the limited approach boundary
the arc flash boundary
the restricted approach boundary
The approach boundary distances for shock protection are dependent on the nominal system voltage in AC systems and on the potential difference in DC systems.
It takes approximately 1.2 calories per square centimeter of thermal energy to cause the onset of a ______________________ burn on unprotected skin.
Which of the following is not a critical factor when calculating incident energy?
the equipment manufacturer
available short-circuit current
speed of overcurrent protection
To provide an appropriate level of protection, arc-rated clothing and protective equipment must be selected to meet or exceed the incident energy level of a potential arc flash at the ____________.
restricted approach boundary
Owners of electrical equipment are not required by the NFPA 70E to install field-labels on equipment.
When should a voltage test instrument be verified to be working properly?
immediately prior to testing
immediately after testing
both immediately prior to testing and immediately after testing