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View Full Version : 110v timer on 220v hwh line ?


George39
Nov 18, 2009, 06:25 AM
Will installing a 110v timer on one leg of a 220v line to the hwh work?

tkrussell
Nov 18, 2009, 01:39 PM
No, the timer will need a neutral in addition to the live line. Water heaters usually are only 240 volts and use two live lines, and do not need a neutral.

They make 240 volt timers for controlling loads such as 240 volt water heaters.