Where attic spaces are not provided with access by permanent stairs or ladders, protection for NM cables shall only be required within __________ of the nearest edge of the attic entrance.

The correct choice is rooted in the National Electrical Code (NEC) requirements, which dictate safety measures for non-metallic (NM) cable installations in areas that may pose potential hazards, such as attic spaces. When permanent means of access, like stairs or ladders, are not available, the NEC specifies that NM cables should be protected within a certain distance of the nearest edge of the attic entrance to minimize the risk of damage.

In this case, the stipulation is that the protection must be within 6 feet of the nearest edge of the attic entrance. The requirement serves to ensure that the cable is safeguarded from potential physical damage when individuals access the attic, particularly when moving around near the entrance where the cables may be exposed.

This regulation is designed to enhance safety for both the electrical installation and the individuals who may access the attic space. Understanding these provisions is essential for inspectors, as it reinforces the importance of compliance with safety standards and the maintenance of electrical installations in residential buildings.