Switch at both exterior doors for same out light.

[howardrichman]

According to art. 210-70(a)(2)(B); does not prohibit one out light to illuminate an area serving two doors if placed properly; but does not mention if a switch is required at each door(3 way). I'm working with a computer controlled Fan/light as an out light with a single pole transmitter device for control(no 3 way provision). I'de rather have 3 way provision, but is it required?

Thank You; HR...

 

[John120/240]

The only place the NEC requires a 3 way switch is at stairs with six or more treads.

 

[ActionDave]

The NEC does not require a three way switch anywhere. This is one of the few instances where it holds true to its' own claim that it is not a design manual.

 

[GoldDigger]

The NEC does not require a three way switch anywhere. This is one of the few instances where it holds true to its' own claim that it is not a design manual.

+1.
Among other things, a requirement for a light controlled from each end of the stairway can be met with two lights rather than a single light with 3-way switches.

 

[howardrichman]

My question is: if a door is added exiting to the outside, where there is an existing door/switch exiting to the same patio; do I need to install another switch at the new exterior door for that existing out light?

HR...

 

[mjf]

not required. Usually, I would sell it (or an additional switched luminaire) for a customers convenience.

Could also consider a motion sensor.