(NEC 2014) 110.26 (D) states that lighting for electrical rooms "shall not be controlled by automatic means only."
Does that mean that automatic control is REQUIRED? Can you use a simple on/off switch and not violate this code?
Need multiple answers/opinions on this, got into a deep discussion with a PE about this particular code.
you are in so calif. you have T24:2016 to deal with as well as the NEC.
this means your job should have T24:2016 certification BEFORE you get a final electrical.
as this horse was beaten in the other thread, i'll put it this way:
if i was doing the third party certification on this job, i'd want a ceiling mounted motion sensor in
an appropriate location to see the entire room. i'd use more than one, if the room was funny shaped, etc,
and put the sensor(s) over 4' from any air conditioning discharge, if one is present.
i'd use wireless ones, for ease of install. lutron makes nice ones. they work well.
i'd have a switch paired to the ceiling mounted sensors. this way, you can force the light on, or off,
as you see fit. lutron makes a nice wall switch that pairs to those easily. you can see a working demonstration
at any starbucks. look in the bathroom.
if it was an itty bitty panel room, i'd put a wattstopper PW-100, and move on to another adventure.
i'd certify such an installation, and it isn't gonna nuisance trip on you while you are in the room, doing
hot work on the switchgear. not that we do any of that, but in theory.
if you are in such a room configured that way, and are spastic with fear of the lights going off,
plug in a worklight, and take a deep breath.