Synchronous immersion heater timeswitch with captive tappets allow programming of a routine switching sequence for an immersion heater. The timer is pre-fitted with a mains link to the volt-free contacts, incorporates an earth park terminal for earth continuity and cable clamps to secure incoming and outgoing wiring. Not suitable for discharge lighting. 2 Hour tappet intervals.- For surface mounting- 7 Day programming- 2 hour tappet intervals- Earth park terminal and cable clamps- 16 Amp resistive, 8 Amp inductive- Volt free SPDT contacts (remove link)