Open Air Photo Control Plug Base Sensor And Photocell Closet Light Photocell Light Sensor

What are NEMA photocell receptacles

On the top of most street lights or parking lot lights is a blue or black round knob that is actually used as a

lighting control device. The most common lighting control is a dusk to dawn or photocell device. The receptacle

can be used for dusk to dawn sensors, but also for advanced DALI / Bluetooth controls. The 3, 5 and 7 pin standard

are set by NEMA and are standard in the lighting industry across all manufacturers. They are all the same 3 pin twist

lock system so they are easily swapped out. The 5 pin and  7 pin add some additional features.

If you have an outdoor lighting fixture with a receptacle but want to turn it on or off with a switch or

use another control instead of the photocell, there is an easy fix. The sensor can easily be swapped

with  a shorting cap or bypass cap outfitted with the same 3 prongs to bypass the sensor.