Adjustable Photocell for NEMA Rotaloc Socket

[stem]

I'm looking for a photocell to replace a NEMA socket type, as per the image below, but I need it to have an adjustable lux setting.

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• stem
• 16 Jun 2014
• 1

I have tried two different manufacturer's photocells with fixed settings and both turned the lights on about half an hour earlier than necessary. Mrs Stem is on an energy drive and giving me grief about it, so if anyone knows where I can get one with an adjustable lux setting that will fit a NEMA socket, please let me know.

 

[ericmark]

It's called black stick on paper. Standard method is to cover the dome to adjust. Some even come with a sticker you can cut to size.

 

[Taylortwocities]

Or ditch the NEMA socket and install a photocell that has an adjustable LUX facility.

for example http://www.scldirect.co.uk/lighting...lls/adjustable-twilight-photocell-switch.html

 

[333rocky333]

It's called black stick on paper. Standard method is to cover the dome to adjust. Some even come with a sticker you can cut to size.

That i would have thought make them come on even earlier

I always thought royce thompson did a range fixed at different lux levels, on the rear they mark the setting of the one you have and im pretty sure theres various other level markings on the back, i assume for the other versions,
To be honest ive always found them to come on late if anything, sometimes the direction affects them, I think they used to suggest facing them north

 

[coopersim]

Mine have 'n' marked on the top bracket (I thought this might mean to face north as opposed to neutral?)

 

[Taylortwocities]

Yes, N means face that side to North.

 

[bernardgreen]

You could try a fitting a reflector and direct more light onto the sensor and thus deceive it into thinking there is more ambient light than there is.

 

[stem]

Thanks everyone for your replies.

I can change it for another type, but if there was a NEMA one available with an adjustable lux, that I could just swap over in a few seconds, without having to drilling any more holes in my house and changing the wiring over whilst up a ladder, or making and fitting a reflector, so much the better. I guess I'm just lazy and trying to avoid unnecessary work.

However, as there doesn't seem to be what I want available, that looks like what I will have to do.

333rocky333 interesting re the Royce Thompson models. I have one of theirs now. From memory, I think it's rated 30 lux on / 70 lux off and assumed that they were all the same. I'll see if I can find one that comes on at lower than 30 lux. I'm aware of an adjustable one (non NEMA) that goes down to 5 lux.

I can't see any markings 'N' or otherwise on mine.

 

[bernardgreen]

You could attach and wire an adjustable sensor to a NEMA plug and plug that in. That would require no more holes in the wall and minimum work at the top of the ladder.

If you are totally dis-satisfied with the present sensor you could dismantle it and use its plug as the plug for the idea above.

 

[333rocky333]

Maybe the one with the clear perspex would be better than the opaque one, in your pic, a good quide is to watch the local street lights, if yours is earlier then it could just be your p/cell location.

Though some councils have specials fitted, selc supply them but there bigger than the standard ones, not sure if thered supply one but may be worth a call.
http://www.selc.ie/assets/files/downloads/SELC Long Life Photocells Brochure ENG.pdf