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#80 - 11/21/00 04:57 AM Which Switch?
Bill Addiss Offline
Member
Registered: 10/07/00
Posts: 3875
Loc: NY, USA
This is something that I heard recently from a Local Inspector that demonstrates good deductive reasoning, I don't know if he thought of it but I guess he could have, He's pretty sharp.

(purely hypothetical - not to code obviously)

If you have a Light in the Attic and 3 switches in the Basement (1 turns on that light) - How can you fgure out, by yourself, which switch it is and only make the trip up to the Attic 1 time?

The Attic is not within sight, no one else there
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#81 - 11/21/00 03:51 PM Re: Which Switch?
Vin Offline
Member
Registered: 11/10/00
Posts: 13
Loc: North Jersey
Depending on the distance this might work.
Go to attic, attach a 9volt battery to hot and nuetral coming in from switch, now go downstairs and see what switch,in the off position gives you a voltage reading. You can also try wiring a recept. to the light temporarily and plugging in a radio with the volume on high and see which switch turns the radio on.
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#82 - 11/21/00 04:24 PM Re: Which Switch?
Bill Addiss Offline
Member
Registered: 10/07/00
Posts: 3875
Loc: NY, USA
Vin,

Hint: It's not that complicated. Much easier - No rewiring or testing of anything.


I don't think I would try that 9 volt battery idea.
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#83 - 11/23/00 07:13 PM Re: Which Switch?
Jeff T Offline
Junior Member
Registered: 10/15/00
Posts: 2
Loc: Murfreesboro,TN,U.S.A
I would guess one is the basement light. Of the other two I would switch one on and leave the other off. If the attic light is on or off tells me which switch.

just a shot in the dark

Jeff
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#84 - 11/24/00 07:59 AM Re: Which Switch?
Bill Addiss Offline
Member
Registered: 10/07/00
Posts: 3875
Loc: NY, USA
Jeff,

From where you are you can't tell what any switches are for. And you will only leave the switch location once to go to the Attic.

Hint: No tools or test equipment needed.
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#85 - 11/26/00 06:24 PM Re: Which Switch?
rmiell Offline
Member
Registered: 11/09/00
Posts: 242
Loc: La Junta, Co. USA
Why not just turn on all three switches? That would be too easy!! Don't keep us in suspense any longer. This is a good one!

Rick
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#86 - 11/26/00 07:44 PM Re: Which Switch?
Bill Addiss Offline
Member
Registered: 10/07/00
Posts: 3875
Loc: NY, USA
Ok, Here it is..

Turn on 1 switch and leave it on for a minute. Turn that one off and turn on another. Go to the Attic immediately - if the light is on you know it's the switch you have on. If it's off but the bulb is warm - it was the first switch. If it is off and cold - it is the last switch that you didn't try yet.
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#87 - 12/11/00 05:59 PM Re: Which Switch?
justagirl Offline
Junior Member
Registered: 12/11/00
Posts: 4
Quote:
Originally posted by Bill Addiss:
Ok, Here it is..

Turn on 1 switch and leave it on for a minute. Turn that one off and turn on another. Go to the Attic immediately - if the light is on you know it's the switch you have on. If it's off but the bulb is warm - it was the first switch. If it is off and cold - it is the last switch that you didn't try yet.



Man,,,bill, you are one smart guy. I would have never though of that, but it is a perfect solution for this guy
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#88 - 12/11/00 06:18 PM Re: Which Switch?
Bill Addiss Offline
Member
Registered: 10/07/00
Posts: 3875
Loc: NY, USA
justagirl,

Thanks, but I can't take credit for the answer. I heard it from someone.
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