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Grey rectangular polycarbonate housing with swivel mount conduit fitting

Tork

Tork ZSS124 Photocontrol 120-277V 2220W

SKU CH-XRSE-XTKYG

A compact 120-277 V AC photocontrol rated 2220 W for LED, HID, inductive and fluorescent loads, switching at 1.5 fc on and 2.25 fc off with a -40 °F to 158 °F operating range

  • Product typeIndustrial Electrical Controls & Automation
  • Automatic dusk-to-dawn lighting at 1.5 foot-candles on / 2.25 foot-candles off
  • Handles up to 2,220 watts across 120-277 V AC circuits
  • SPST contact rated 15 A incandescent / 8 A ballast for reliable switching
  • Polycarbonate housing withstands -40 °F to 158 °F extremes
  • UL listed and ANSI compliant for code-approved installations

Industrial Photocontrol 120–277 V AC

The Tork ZSS124 is a swivel-mount photocontrol rated for 120 to 277 V AC and a maximum load of 2,220 W. It switches lighting circuits on at 1.5 foot-candles and off at 2.25 foot-candles. The unit carries UL listing and ANSI compliance for commercial and industrial installations. Gray polycarbonate housing protects the SPST contact in ambient temperatures from -40 to 158 °F.

Voltage and Load Limits

The device operates across a 120 to 277 V AC supply without separate taps. Resistive loads up to 15 A and ballast loads up to 8 A are supported within the 2,220 W ceiling. Exceeding either current rating risks contact welding or premature failure. No dimming or multi-level control is provided; the relay is strictly on/off.

Swivel Mount and Polycarbonate Housing

A built-in swivel conduit mount lets the sensor head rotate for optimal sky exposure after the conduit is secured. The compact 2 × 2 3/4 × 4 1/4 in polycarbonate body resists UV degradation and impact. SPST wiring uses standard pigtails inside the conduit hub. The fixed 1.5 / 2.25 fc thresholds cannot be adjusted in the field.

How it compares

Measured against everything we stock in Sensors, Buzzers & Control Modules, at today’s prices. Recalculated every night.

Price $17.99
Cheaper than about 72% of the 89 comparable items (median $29.99).

Specifications

Product
Brand nameNSI TORK
Product typeIndustrial Electrical Controls & Automation

Questions about this item

What does the 2,220 W rating mean for the lighting load I can connect?

The 2,220 W maximum wattage is the total connected load the photocontrol can switch on a 120 to 277 V AC circuit, covering compact fluorescent, HID, inductive and LED fixtures.

How do the 1.5 and 2.25 foot-candle thresholds work once the unit is installed?

The photocontrol turns the load on when ambient light falls to 1.5 foot-candles and turns it off again when light rises to 2.25 foot-candles, providing a built-in hysteresis band.

What does the SPST contact form and UL listing cap in practice?

The single-pole single-throw contact switches one circuit up to 15 A incandescent or 8 A ballast, and the UL listing confirms it meets the ANSI safety standard for that rating.

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