The 1st exception is clear: it allows bedroom wall switches to control one or more suitable receptacles that will be subsequently used by the resident to heat up free standing lamps.
In the code, an outlet is taken to be a direct wiring of a light fixture -- in this instance -- whereas it is so common to have no overhead light fixture in the bedroom: all lights are to be lamps.
This style of lighting may include a more substantial space such as a living room.
The Second exception allows for occupancy sensors in lieu of traditional switches. Think of WattStoppers and its rivials. These can be dropped in directly to replace ordinary switches. They can also be wired in series with traditional switches.
These 'new' devices are what is addressed. Again, they are switching wall receptacles that are intended to heat up free standing or table lamps.
[This message has been edited by Tesla (edited 11-05-2005).]
Re: Occupancy sensor#96114 11/05/0507:02 AM11/05/0507:02 AM
What gets overridden- the turning on or the turning off?
George I am glad you asked as that is something I have wondered.
Most of the wall switch motion sensors I have installed can only be overridden to the 'off' mode. To override them to 'on' usually means getting into the adjustment section.
Here is the exception George is asking about.
210.70(A)(1)Exception No. 2: Lighting outlets shall be permitted to be controlled by occupancy sensors that are (1) in addition to wall switches or (2) located at a customary wall switch location and equipped with a manual override that will allow the sensor to function as a wall switch.
I have a related question.
110.26(D) Illumination. Illumination shall be provided for all working spaces about service equipment, switchboards, panelboards, or motor control centers installed indoors. Additional lighting outlets shall not be required where the work space is illuminated by an adjacent light source or as permitted by 210.70(A)(1), Exception No. 1, for switched receptacles. In electrical equipment rooms, the illumination shall not be controlled by automatic means only.
Does this rule out a motion sensor even if it can be overridden?
Bob Badger Construction & Maintenance Electrician Massachusetts
Re: Occupancy sensor#96115 11/05/0509:13 AM11/05/0509:13 AM
If it replaces the wall switch it is clear it must have both manual on and off capability. The question is with "in addition to..." Basically is the M/D wired in series or parallel? I think it is ultmately a design decision. I have about 20 in and out of the house so can argue both sides of that ;-)