Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 09-29-2006, 01:53 PM   #1
Newbie
 
Join Date: Sep 2006
Posts: 3
Share |
Default

Two PIR wall switches for a single lightbulb?


Hi! First post. I'm from UK if that makes a difference to the questions below. Please read the scenario over carefully, because I'm not sure whether what I want to do would be classed as a 2-way system or not. Thanks!



The ceiling light in the entrance hall is currently controlled by an ugly push button timer switch at the bottom of the stairs and a standard on/off switch at the top of the stairs.

The timer switch always works regardless of the position of the on/off switch, but when the on/off switch is 'on' it overrides the timer switch, keeping the light on forever even if the timer has timed out.

I like the idea of replacing both the push button switch and the on/off switch with a couple of these PIR wall switches with timers:
http://www.screwfix.com/app/sfd/cat/...66514&ts=40874
I want the light to switch and stay on for 3 minutes no matter whether a sensor is passed at the top of the stairs, or the bottom, OR BOTH PIRs within a few seconds of each other.

I think that the product is not specifically designed for a two way system (it doesn't say)? However, is it actually a two way system if you want the lights to stay ON when both switches are triggered?

In my current setup, it is impossible for the lights to be off unless BOTH switches are off. Assuming these PIRs are one way switches, is it possible to wire them up in the same way as the existing setup so that the lights will only go off when both timers have timed out?


Last edited by GabrielKnight; 09-29-2006 at 01:59 PM.
GabrielKnight is offline   Reply With Quote
Old 09-29-2006, 02:48 PM   #2
Member
 
Join Date: Jan 2006
Location: Toronto, Canada
Posts: 1,861
Default

Two PIR wall switches for a single lightbulb?


connect the light to both switch making them an OR gate logic, either one can turn it on... and use the auto mode of the light, that means either one can turn it on and set time's on option to 3 minutes (if doable by the switch) so both switch will be off at after 3 minutes and light shut off...and anyone trigger on , light will come on... should work... to use an existing wire, this would be tricky but should be doable...as the wire are three wires + a ground right now, just make sure use two of it and abandon the other one... and both switch hot connect to incoming hot, neutral connect to incoming neutral, and both output are together to the light...

KUIPORNG is offline   Reply With Quote
Old 09-29-2006, 03:12 PM   #3
Newbie
 
Join Date: Sep 2006
Posts: 3
Default

Two PIR wall switches for a single lightbulb?


Quote:
Originally Posted by KUI****G View Post
connect the light to both switch making them an OR gate logic
STOP! This is starting to remind me of my old physics lessons, lol!

Quote:
Originally Posted by KUI****G View Post
either one can turn it on
That's a better way of putting it. But both have to put it out, n'est pas?

Quote:
Originally Posted by KUI****G View Post
set time's on option to 3 minutes (if doable by the switch) so both switch will be off at after 3 minutes and light shut off...and anyone trigger on , light will come on... should work...
3 mins was an example,but timers are adjustable. Plan is to make them both the same.

Quote:
Originally Posted by KUI****G View Post
to use an existing wire, this would be tricky but should be doable.
Is my current system not the same parallel one (always on until both are off) as the one I want to do with the PIRs? Why will the wiring be different? Not asking out of malice, but want / need to know.

Quote:
Originally Posted by KUI****G View Post
to use an existing wire, this would be tricky but should be doable...as the wire are three wires + a ground right now, just make sure use two of it and abandon the other one... and both switch hot connect to incoming hot, neutral connect to incoming neutral, and both output are together to the light...

Hmmmm. What?! Assuming PIR switch has two holes (standard 1 way switch), which wire goes where? All I know from a movie I saw that cutting the red wire is a bad idea. Don't forget I'm UK. Does this make a difference to the scenario?

Last edited by GabrielKnight; 09-29-2006 at 03:14 PM.
GabrielKnight is offline   Reply With Quote
Old 09-29-2006, 03:18 PM   #4
Member
 
Join Date: Jan 2006
Location: Toronto, Canada
Posts: 1,861
Default

Two PIR wall switches for a single lightbulb?


your switch is wired incorrectly ... then... I saw contractor before unable to read those 3 ways switch diagram and then I correct them it work... about 10 years ago...

the problem is you still have a 3 wires situation... you can use a tester to test which wire (red,black,white) has voltage... after disconnecting them all of them... to find the true hot wires.... now how to find the true neutral.... if you have a multimeter then you can measure the resistance to the light's hot and neutral to determine the neutral wire and output hot wire...

gee it is easy to say... but doing it is another story... I assume you know the main switch to shut off for this mess around though...

if your wire only contain 2 wires, black and white then you can do it without all those guessing above...


I just thought of an idea, find another device control by the same circuit... then use multimeter to find the true hot wire and true neutral wire by this device, resistance = 0 then you are the master of the game... tool required: a long wire you can cut for connecting to this device, a outlet is preferrable...

Last edited by KUIPORNG; 09-29-2006 at 03:31 PM.
KUIPORNG is offline   Reply With Quote
Old 09-29-2006, 03:38 PM   #5
Newbie
 
Join Date: Sep 2006
Posts: 3
Default

Two PIR wall switches for a single lightbulb?


Sound like a pain in the proverbial. I'll take the current switches out tomorrow to have a peak and will come back to let you know. How does one post pics on this forum? Stay tooooned.
GabrielKnight is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Replace Cripple Wall to Raise Foundation? casey_wa Building & Construction 1 08-04-2007 04:32 PM
Atlantic-need your opinion on markd's comments about my vapor barrier? yummy mummy Building & Construction 11 03-07-2007 09:47 AM
This is not a load-bearing wall, right? AllGoNoShow Building & Construction 4 01-07-2007 03:49 PM
Load Bearing Wall? Traybae Remodeling 3 11-05-2006 01:39 PM
Load Bearing Wall? Traybae Building & Construction 1 11-05-2006 01:01 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.