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Gray cylindrical photocontrol with threaded mounting stem

Intermatic

Intermatic K4423M Photocontrol 208-277VAC 3100-4150W

SKU CH-4V8E-RGSJ2

Automatically switches lighting at dusk and dawn for 208–277 VAC circuits up to 4,150 W in a raintight die-cast zinc housing

  • typePhoto Control
  • materialHAWA
  • weight0.5
  • Automatic dusk-to-dawn lighting control
  • Handles 208-277 VAC supply voltage
  • Switches up to 4150 W ballast load
  • Raintight die-cast zinc enclosure
  • Operates from -40 °F to 158 °F

Purpose and voltage range

The Intermatic K4423M is a dusk-to-dawn photocontrol designed for outdoor lighting circuits operating between 208 and 277 volts AC. It serves installers and property managers who need automatic on-off switching for commercial or municipal fixtures.

Included hardware impact

The package supplies a lock nut and a washer gasket that create a raintight seal at the mounting stem. These parts let the installer secure the unit to a standard junction box without sourcing separate sealing hardware.

Pre-installation checks

Verify that the supply voltage falls within the 208 to 277 VAC range and that the total connected load stays below 4150 watts. Confirm the ambient temperature at the mounting location remains between -40 and 158 degrees Fahrenheit and that the enclosure orientation matches the stem mounting requirement.

Highlights

  • Automatic dusk-to-dawn lighting control
  • Handles 208-277 VAC supply voltage
  • Switches up to 4150 W ballast load
  • Raintight die-cast zinc enclosure
  • Operates from -40 °F to 158 °F

Specifications

BrandIntermatic
typePhoto Control
materialHAWA
weight0.5

Questions about this item

How often will the photo control sensor need replacement under continuous dusk-to-dawn operation?

The unit is built with a die-cast zinc housing and raintight enclosure rated for -40 to 158 degrees F, so the sensor itself typically lasts years without scheduled replacement.

What is the maximum load the contacts can switch before thermal limits become the bottleneck?

The SPST contacts are rated for 4150 watts maximum, 15 amps incandescent or 8.3 amps ballast at 208 to 277 volts AC.

How much heat does the photocontrol generate when it runs all day controlling a full 4150 watt load?

Power draw of the control itself is minimal; the housing is designed to dissipate heat within the -40 to 158 degree F operating range without active cooling.

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