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Translucent gray twist-lock photocontrol with cylindrical housing

Intermatic

Intermatic LC4521LA photocontrol twist-lock 120V AC dusk-to-dawn switch

SKU CH-N96A-YW66E

Twist-lock photocontrol switches 120 V AC loads up to 1,000 W at dusk and off at dawn

  • TypeLight Switch
  • Color MappingTranslucent/Gray
  • Dusk-to-dawn automation activates at 0.5 foot-candles
  • Turn-lock mounting fits standard photocontrol receptacles
  • Rated 15 A incandescent and 8.3 A ballast loads
  • Operates from -40 °F to 158 °F in raintight housing
  • Certified to ANSI C136.10, cCSAus and UL standards

Photocontrol for dusk-to-dawn operation

The Intermatic LC4521LA is a twist-lock photocontrol designed for outdoor lighting circuits that must switch automatically at dusk and dawn. It mounts on a standard turn-lock receptacle and carries a raintight polypropylene enclosure rated for temperatures from -40 to 158 degrees Fahrenheit.

1000-watt capacity with 15-amp incandescent rating

The unit handles up to 1000 watts and 15 amps of incandescent load or 8.3 amps of ballast load, making it suitable for most residential and light-commercial fixtures. It turns on at 0.5 foot-candles and off at 15 foot-candles, so very bright ambient light will keep the circuit open.

ANSI C136.10 twist-lock base

The twist-lock mounting follows the ANSI C136.10 standard and is listed to cCSAus, UL and California Title 20 requirements. Buyers whose fixtures use a different base type or who need a voltage other than 120 V AC cannot use this part.

Highlights

  • Dusk-to-dawn automation activates at 0.5 foot-candles
  • Turn-lock mounting fits standard photocontrol receptacles
  • Rated 15 A incandescent and 8.3 A ballast loads
  • Operates from -40 °F to 158 °F in raintight housing
  • Certified to ANSI C136.10, cCSAus and UL standards

Specifications

TypeLight Switch
BrandIntermatic
Color MappingTranslucent/Gray

Questions about this item

Will the LC4521LA twist-lock photocontrol fit my existing ANSI C136.10 receptacle on a 120V circuit?

Yes — the LC4521LA uses a standard ANSI C136.10 twist-lock base and is rated for 120V AC, so it locks directly into compatible receptacles on a 120V supply.

How can I verify the LC4521LA is switching at the correct light levels after installation?

Cover the translucent/gray sensor; the load should turn on. Expose it to bright light (above 15 foot-candles); the load should turn off. The SPST contact opens at 15 fc and closes at 0.5 fc.

Does the LC4521LA package include a mounting receptacle or wiring pigtails, or must I buy them separately?

The supplier notes "Includes Not Applicable", so no receptacle, pigtails or mounting hardware are supplied. You must provide a compatible ANSI C136.10 twist-lock receptacle and wiring.

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