Control water heater using ordinary switch 

Ordinary switch can be used as water heater timer ...see do-it-yourslef options
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Cooper 30 Amp switch

A water heater can be controlled directly with a 30 Amp switch. Always use a green color-coded 30 Amp switch and 10 gauge wire.

See 30 Amp switch installation



Water heater can be controlled indirectly using standard 20A or 15A switch. These switches are not rated heavy enough to connect directly to 220V water heater. They require an intermediate contactor.

Pilot-light shows when water heater is turned on.

See 15-20 Amp switch installation

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