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has anybody tried this? #163683
05/14/07 05:42 PM
05/14/07 05:42 PM
Niko  Offline OP
Member
Joined: Aug 2006
Posts: 356
Campbell, CA
Hi Folks,
Do you know if a OC (occupancy sensor) can be in series with a dimmer.
Here is what i am proposing to do:
Install two lowvoltage recessed cans above a indoor jacuzzi tub, have a dimmer control them and to comply with title 24, have the OC control the dimmer.

Has anybody tried this?

Thanks for your input


Be kind to your neighbor, he knows where you live

Work Gear for Electricians and the Trades
Re: has anybody tried this? [Re: Niko] #163686
05/14/07 06:34 PM
05/14/07 06:34 PM
J
joncon  Offline
Junior Member
Joined: Feb 2007
Posts: 20
Phoenix, AZ
As long as the OS is before the dimmer, no problem.

Re: has anybody tried this? [Re: Niko] #163687
05/14/07 06:37 PM
05/14/07 06:37 PM
S
ShockMe77  Offline
Member
Joined: Jun 2005
Posts: 821
Rahway, New Jersey
A guess:

If the occupancy sensor is rated for a particuliar voltage, then it will not be operating at it's rated voltage and therefore in violation of 110.3 (B).


Re: has anybody tried this? [Re: Niko] #163691
05/14/07 09:37 PM
05/14/07 09:37 PM
E
e57  Offline
Member
Joined: May 2003
Posts: 2,876
S.F.,CA USA
I particularly like to use Meastro dimmers for this! They make a neat effect as they fade up to the pre-set if left on. (only using the VC to control it) With a few dimmers you can kind of make a 'scene' out of it when operating the "Vacancy Sensor", (Not 'occupancy sensor'!) and all the dimmers come up to preset levels.

Shockme, VC uses NC contacts, the dimmer gets the same voltage, you dont or should not dimm the VC.


Mark Heller
"Well - I oughta....." -Jackie Gleason
Re: has anybody tried this? [Re: e57] #163692
05/14/07 09:43 PM
05/14/07 09:43 PM
E
e57  Offline
Member
Joined: May 2003
Posts: 2,876
S.F.,CA USA
I think I want to dub that the "Poor-mans Grafik Eye"....


Mark Heller
"Well - I oughta....." -Jackie Gleason
Re: has anybody tried this? [Re: e57] #163701
05/15/07 09:02 AM
05/15/07 09:02 AM
G
ghost307  Offline
Member
Joined: May 2005
Posts: 958
Chicago Illinois USA
Should I mention that you should check also to see if your Code allows lights above the tub before you get too far along?

I know that Chicago is dead set against it.


Ghost307
Re: has anybody tried this? [Re: ghost307] #163717
05/15/07 02:00 PM
05/15/07 02:00 PM
Z
Zapped  Offline
Member
Joined: Oct 2002
Posts: 482
Huntington Beach, CA, USA
I don't see any problem with this approach. As long as the sensor is BEFORE the dimmer, all components are getting proper operating voltage.

BTW, I did not know that about Chicago Ghost. Do they also not allow sealed-trim can lights above showers?

Re: has anybody tried this? [Re: Zapped] #163718
05/15/07 03:03 PM
05/15/07 03:03 PM
G
geoff in UK  Offline
Member
Joined: Dec 2002
Posts: 193
UK
Depends if its the type of PIR occupancy sensor which has its own neutral, or the type which is in series with the line and relies on that to power it. The former will work; the latter not.

Re: has anybody tried this? [Re: geoff in UK] #163719
05/15/07 03:29 PM
05/15/07 03:29 PM
G
ghost307  Offline
Member
Joined: May 2005
Posts: 958
Chicago Illinois USA
The wording in the Code is similar to NEC for pendant lights, but there's a part that prohibits many of the light installations of this variety by a somewhat left-handed means. It limits the mounting height to no lower than a minimum of 7 ft 6 in. above the maximum water level. Even then they require a ground-fault circuit interrupter for it.

You can use recessed fixtures with a glass or plastic lens and nonmetallic or electrically isolated metal trim, suitable for use in damp locations or surface-mounted fixtures with a glass or plastic globe and a nonmetallic body or a metallic body isolated from contact if the fixtures are suitable for use in damp locations lower than the 7'-6 above the maximum water level if you provide a ground-fault circuit interrupter.

To paraphrase the Chicago Code; "sure it's okay...just jump through this moving hoop while whistling Dixie and juggling these oranges".

They're very accomodating here.


Ghost307
Re: has anybody tried this? [Re: ghost307] #163722
05/15/07 05:49 PM
05/15/07 05:49 PM
Niko  Offline OP
Member
Joined: Aug 2006
Posts: 356
Campbell, CA
Thanks for all of your replies.

Mark, what is the difference between OS (occupancy sensor) and VS (vacancy Sensor)

Thanks


Be kind to your neighbor, he knows where you live

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