Applies To
All Spring Wound Timers (FF Series, FD Series, SW Series)
Question / Problem
Can spring wound timers be used on a 240 volt circuit?
Safety Warning
Warning: Disconnect power at the circuit breaker before servicing or wiring any device. Use a voltage tester to confirm power is off. All electrical work must comply with national and local electrical codes.
Product Details and Use
Spring wound timers are available in both single-pole and double-pole versions. Understanding the difference is important when controlling a 240 volt circuit.
Single-pole spring wound timers are intended for 120 volt applications only. While a single-pole timer can technically switch one leg of a 240 volt circuit, this is not recommended because the remaining leg stays energized. For safety and proper operation, 240 volt loads should use a double-pole timer that switches both hot legs.
Approved double-pole spring wound timers for 240 volt applications include:
- FD460MW
- FF460M
These double-pole models are specifically rated for 240 volt circuits and are commonly used for pumps, heaters, and other double-pole loads where both legs must be switched off.
Tips / Additional Notes
- Single-pole timers are not recommended in 240 volt applications. A double-pole timer should be used for proper 240 volt load control.
- Spring wound mechanical timers do not require a neutral conductor.
- Always verify voltage and wiring configuration on the device label before installation.
- Follow all national and local electrical code requirements.