Your pump can be wired either 115V or 230V If you have your pool pump wired at 230V than you would want to go with the T104P3 timer if you have the pump wired at 115V than you would want to go with the T101P3 timer. T104P3 timer has a 230V time clock motor and the T101P3 timer has a 115V time clock motor. You may purchase either of these time clocks through the following link http://www.inyopools.com/controls_intermatic.aspx
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