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Photocell twistlocks #49600 03/10/05 06:46 PM
Joined: Dec 2004
Posts: 1,064
Dnkldorf Offline OP
Looking for some info on the twist lock photo cells for street lighting.

What is the trick to these?
Other than the multi-voltage, and the wattage for them, I can't seem to get some of them to just twist in, and operate properly.

The package says, you have to disconnect power before installing.

How do you guys do it?

Work Gear for Electricians and the Trades
Re: Photocell twistlocks #49601 03/10/05 06:57 PM
Joined: Apr 2002
Posts: 7,220
HotLine1 Offline
Never saw any that said "turn-off" as you say. Basically, just like a twistlock cord cap. No tricks that I have seen, nor have any of my men mentioned any problems.

This is not to say that there may be some non-standard (Non-NEMA) devices around, with all the 'junk' coming in from everywere.


Re: Photocell twistlocks #49602 03/10/05 07:02 PM
Joined: Feb 2005
Posts: 361
Celtic Offline
If the PC is new, the gasket may be "thick" - some brute force (compacting the gasket) and a firm, but gentle twist usually gets it in w/o smashing it.
Pass the Wheaties ! [Linked Image]

~~ CELTIC ~~
...-= NJ =-...
Re: Photocell twistlocks #49603 03/10/05 08:42 PM
Joined: Dec 2004
Posts: 1,064
Dnkldorf Offline OP
I went through 6 differnt photocells on one light.
2 different manufactures of them.

240 light 400w MV.

One manufacturer was intermatic, 120-305V rated 1000w. Freaking light wont shut off.
2nd was some cheapo, 208-277V 1000w. Same light wont shut off after installing them.

Everything is wired right, damn light won't go out. Intermatic paperwork says to disconnect power before installing. Tried everything.

Freaking ghosts messing with me, or bad batches of cells?

Re: Photocell twistlocks #49604 03/10/05 08:47 PM
Joined: Feb 2005
Posts: 361
Celtic Offline
It is always possible for a bad batch to get through QA control measures, but before I blame manufac. I would recheck my connections (including ballast taps) - then I would try again w/pc...I use the box it came in to block the light.
Another thought...wire the fixture straight through (no pc) and check that the bulb actually lights - so many things can go fubar from source to bulb: connections, capacitor, ignitor, etc.

~~ CELTIC ~~
...-= NJ =-...
Re: Photocell twistlocks #49605 03/10/05 11:14 PM
Joined: May 2003
Posts: 2,876
e57 Offline
Some of them will take awile to go out, like a few minutes. Some have clocks in them to delay off and on. But it sounds like hot and sw reversed.

Mark Heller
"Well - I oughta....." -Jackie Gleason
Re: Photocell twistlocks #49606 03/11/05 07:13 AM
Joined: Oct 2004
Posts: 265
dmattox Offline
You sure you dont have test versions? You can buy 2 types, one that is a photocell and the other is just a short so you can test the light or have it controlled from a different source. Counter guys are always screwing up and giving us the wrong type.


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