Handholds in poles supporting luminaires are not mandated for poles of what height if they have a hinged base?

Handholds in poles that support luminaires are typically designed to provide easy access for maintenance and servicing, especially for tasks like changing lamps or performing repairs. The National Electrical Code (NEC) specifies requirements for various installations to enhance safety and accessibility.

In the case of poles with a hinged base, the regulations state that handholds are not required for poles of certain heights because the hinged base allows easier access to the top of the pole without the need for climbing it directly. Specifically, for poles that are 20 feet or taller, the design feature of the hinged base reduces the risk associated with maintenance work at height. This means that workers can safely perform their duties without needing a handhold, as the hinged base provides the necessary access.

Thus, when considering the options, poles of 20 feet or taller do not require handholds due to the access afforded by the hinged base, making this the correct answer. Options suggesting lower heights imply a need for handholds despite the introduction of a hinged base, which the NEC does not require in this context.