Intermatic T7801BC Timer

The Intermatic T7801BC is a heavy-duty 7-day mechanical time switch designed for precision scheduling in commercial HVACR and lighting applications. This 120V AC 60Hz unit features a 4-pole design with 2NO/2NC contact configuration, allowing for the simultaneous control of multiple circuits or specialized motor loads. Unlike standard timers, the T7801BC includes a captive tripper system that enables up to 3.5-hour minimum ON/OFF intervals and independent scheduling for every day of the week. The integrated spring-wound carryover mechanism is a critical fail-safe, providing up to 16 hours of reserve power to maintain accurate timing during localized outages. Built in a Type 1 indoor metal enclosure, this electromechanical timer simplifies load management for contractors requiring a rugged, analog solution where digital interfaces might fail. Its DPDT switching action ensures versatility for controlling fans, pumps, and signage circuits without needing additional relays.

• Synchronous Motor with Carryover: Maintains timing accuracy during power interruptions for up to 16 hours.
• Flexible Scheduling: 7-day dial allows for distinct daily programs, ideal for commercial building automation.
• High Amperage Rating: Rated for 40 Amps per pole resistive, handling demanding HVACR motor loads and tungsten lighting.
• Manual Override: Features a temporary manual toggle for system testing or emergency bypass without disrupting the master schedule.
• Multi-Circuit Control: The 2NO/2NC contacts facilitate complex wiring configurations for both heating and cooling cycles.

How do I wire the Intermatic T7801BC for a 120V circuit?
The timer requires a 120V supply to the motor (Terminals L and N). Always verify your wiring diagram to ensure the 2NO/2NC contacts are correctly phased for your specific load requirements, typically used for alternating equipment cycles.

What is the benefit of the spring-wound carryover in this model?
The mechanical carryover prevents the clock motor from losing time during a black-out. This eliminates the need for technicians to return to the job site to recalibrate the time switch after power is restored.

Can this timer handle outdoor installations?
The T7801BC comes standard in a NEMA 1 enclosure, which is strictly for indoor use. For outdoor applications, the internal mechanism must be transferred to a NEMA 3R rated housing.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.