NFPA 70E questions and answers (2)

NFPA 70E
2. For exposed 480 VAC energized conductors and using NFPA 70E Table 130.2(C) or the
Shock Protection Boundaries and PPE Fermilab Summary table for NFPA 70E, the Restricted
Approach Boundary for shock protection is

a. 1 Inch
b. 7 Inches
c. 1 Foot
d. 3 Feet 6 Inches - questions and answers-c

3. For energized circuits, escorted unqualified persons are allowed within which Shock
Protection Approach Boundaries?

a. Restricted Approach Boundary
b. Limited and Restricted Approach Boundaries
c. Limited Approach Boundary
d. Prohibited Approach Boundary - questions and answers-c

6. If an electrical circuit that normally operates above 50 volts has been de-energized but not
tested to verify that the circuit is in an electrically safe work condition, which of the following
apply?

a. Requirements associated with Shock Protection Boundaries must be followed
b. Requirements associated with the Flash Protection Boundary must be followed
c. NFPA 70E does not require a written Energized Electrical Work Permit for performing LOTO
voltage verification testing
d. All of the above apply - questions and answers-d

8. Voltmeter testing of a 480 VAC 3 Phase Circuit to verify that the circuit is OFF typically
involves

a. 3 measurements of phase to phase voltage
b. 3 measurements of phase to ground voltage
c. 3 measurements of phase to neutral voltage
d. All of the above measurements are necessary - questions and answers-d

9. What is the maximum use voltage of Class 0 rubber insulating gloves?

a. 500 Volts AC
b. 1,000 Volts AC
c. 7,500 Volta AC
d. 26,500 Volts AC