A PV isolating device shall be permitted to be a finger safe ___.

A PV isolating device shall be permitted to be a finger safe ___.

• A. circuit breaker
• B. fuse holder
• C. general-use switch
• D. molded case switch

Answer: (B)

The idea here is to use a device that can be opened or removed without exposing live parts, so a technician can safely isolate the PV array. A finger-safe fuse holder is designed so the live connections are enclosed and only the fuse moves inside the unit, with a guarded, recessed interface that prevents accidental contact. This makes it suitable as a PV isolation point because it minimizes the chance of touching energized conductors during operation or maintenance. Other options—like a general-use switch or molded-case switch—can expose live parts or require additional enclosures to meet the “finger-safe” requirement, and a circuit breaker, while protective, is not designated here as the specified finger-safe PV isolator.

The idea here is to use a device that can be opened or removed without exposing live parts, so a technician can safely isolate the PV array. A finger-safe fuse holder is designed so the live connections are enclosed and only the fuse moves inside the unit, with a guarded, recessed interface that prevents accidental contact. This makes it suitable as a PV isolation point because it minimizes the chance of touching energized conductors during operation or maintenance. Other options—like a general-use switch or molded-case switch—can expose live parts or require additional enclosures to meet the “finger-safe” requirement, and a circuit breaker, while protective, is not designated here as the specified finger-safe PV isolator.