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#51981 05/16/05 09:57 PM
Joined: Mar 2004
Posts: 55
eswets Offline OP
Installed a new post light last week, and could not get the lights to turn off. Replaced photo cell three times. Voltage was correct and line and load was correct. Finally found the problem. Any guesses to what happened.

#51982 05/16/05 11:04 PM
Joined: Mar 2005
Posts: 212
The sun never rose that day? What?!

#51983 05/17/05 05:02 AM
Joined: Oct 2000
Posts: 2,723
Likes: 1
Broom Pusher and

Installed a new post light last week, and could not get the lights to turn off. Replaced photo cell three times. Voltage was correct and line and load was correct. Finally found the problem. Any guesses to what happened?

Here are some guesses:


[*] Did not turn off Power before Connecting Photocell (AKA - Wired it "Hot"),

[*] Did not have the "Light Limiter" slider up far enough (the metallic gizmo which slides over the PC's lens),

[*] Forgot to remove the "Tape" from the Lens after testing it - or (see #4)

[*] Did not remove the protective covering from the lens - if used,

[*] Bad, or non-existent "Neutral" connection to "Common Wire" of Photocell,

[*] Load Current exceeded the max. ratings of the Photocell, forcing it into an Arced closed situation,

[*] Left it in the "Test" mode, or some slider switch setting which relates to motion / light levels, or switch overide,

[*] Photocell was getting hit from something while in operation - like a Tree's Branches blowing in the wind were hitting the Photocell,

[*] Photocell was designed to turn loads "off" when dark, or something in this realm,

[*] Photocell was marked incorrectly - like intended to be used in conjunction with another component, or it was really a motion sensing - "off" or "on" device, or Line/Load incorrectly marked (grasping at straws here)

[*] Lighting Fixture(s) Posessed by a Demon, and Demon has no tolerance for Photo Controlled Apparatii.

Any of these come close?


Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!
#51984 05/17/05 07:10 AM
Joined: Dec 2004
Posts: 1,064
I had a bitch of a time with photocells a little while back on street lights, had the right voltage, but the buggers wouldn't work when plugged in.

Problem: nuetral tap 3 poles down dropping the nuetral out, when a load was applied.


#51985 05/17/05 10:38 AM
Joined: Jul 2004
Posts: 9,917
Likes: 29
How long are you waiting? The photocells I have will start out "on" and it takes a few minutes before it finally figures out the sun is up. It also seems to take full sun to turn it off.

Greg Fretwell
#51986 05/17/05 10:49 AM
Joined: Sep 2001
Posts: 806
Some PC controls have a jumper wire to select operating mode, as well. By cutting or not cutting the wire, you select "Dark=Load OFF" or "Dark=Load ON"

#51987 05/17/05 06:11 PM
Joined: May 2003
Posts: 2,876
e57 Offline
The piece of black tape you left over the "eye"?

Mark Heller
"Well - I oughta....." -Jackie Gleason
#51988 05/17/05 07:02 PM
Joined: Feb 2003
Posts: 939
other possibtly is the photo cell socket bypassing the photocell circuit

or other possiblty is the photocell is line up wrong way where the eyes is not getting correct light source

or other possiblty is the line - load bypassing the photoeye circuit

Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)

#51989 05/17/05 07:28 PM
Joined: Mar 2002
Posts: 125
Does the post light have a ballast? If so did you conect the photo cell to the socket to photo cell. Had an apperntice do that once. Would not shut off.

#51990 05/17/05 07:33 PM
Joined: Aug 2004
Posts: 186
Light is shinning to close to photocell causing it to think its sun. this has happened to me.

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