Re: Motion Detection Switches & CFL Flicker
I think you're on the right track, Maurice.
In order to power a two-wire motion sensor, it must pass its return current through the light bulb since it doesn't have a connection to the neutral wire. CFLs don't do a good job of allowing this current; they'll flicker because of voltage that passes through the motion sensor when it's off.
A three-wire motion sensor (not to be confused with 3-way) includes a neutral wire for the return current that must be connected to a neutral line. This allows the load side of the sensor to be completely unpowered when off so the CFL won't flicker.
Moral of the story is it's best to use a 3-wire motion sensor and run a neutral to the switch box so you can use CFLs with it.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.