Mike Holt's Code Question and Graphic of the Day

A great free resource from Mike Holt Enterprises, this daily Code Graphic is a smart learning tool. Use it as a topic of discussion each day and review it with your employees or colleagues in your safety meetings, at lunch, or in the field.

This graphic is based on the 2017 NEC©
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Lighting Outlet, Alternative Switching, Dwelling 210.70(A)(2) Ex to (A)(2)(1), (2), and (3) An outside entrance luminaire can be controlled by a motion sensor. Lighting outlets for hallways, stairways, and outdoor entrances can be switched by a remote, central, or automatic control device. Copyright 2020, www.MikeHolt.com Enlarge Image
This question is based on the 2017 NEC©
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NEC® Code Quiz Question of the Day

(Not related to the above graphic.)

When the Code uses "_____," it means the identified actions are allowed but not required, and they may be options or alternative methods.

(a) shall

(b) shall not

(c) shall be permitted

(d) a or b