Time Clock Standard

A time clock switches circuits based on set times, while a photocell reacts to ambient light. Many systems use both for flexibility.

Astronomical clocks calculate sunset/sunrise by location and date, adjusting automatically through the year—ideal where ambient light varies.

Most clocks support multiple programs and holiday overrides. Set scenes for weekday routines and later hours on weekends.

Use multi‑circuit models or external contactors to split zones. Ensure total load stays within the clock’s rated amperage.

Yes—battery backups preserve time and programs during outages. Check the battery annually and replace as needed.

Common setup: photocell turns ON at dusk; the clock turns OFF at a set time (e.g., 11 pm) while a subset stays on for security.

Smart clocks add remote control, sunrise/sunset automation, and notifications. They’re helpful for large properties or frequent changes.

Choose NEMA/IP‑rated enclosures or mount clocks inside transformer cabinets with gasketed doors suitable for wet locations.

Astronomical models auto‑adjust for DST and seasons. Verify latitude/longitude settings and time zone for accuracy.

Review schedules seasonally, replace backup batteries, and keep enclosures clean and dry. Update firmware on smart clocks.