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Turn water heater on-and-off with 30 Amp switch>For those who turn off water heater frequently, but don't want to wear out the circuit breaker.>Review basic water heater circuit before continuing Materials list:Always use orange-colored 10 gauge wire and 30 Amp Green-color-coded switch (double-pole Cooper brand 30 Amp switch available at Lowes can turn off 1 or 2 circuits at same time). |
| 1.)
Control 120V or 240V water heater
by turning off
one hot wire: Check side of water heater for voltage |
2.)
Control 240V water heater by turning off
both hot wires: use deep box |
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Instructions for two illustrations above> 240 Volt water heater can be controlled by turning off one hot wire or both hot wires.> Turn off circuit breaker > nail box onto nearby 2x4 > connect 10-2 wire as shown > attach wires to 30 Amp switch and tighten screws firmly against copper wire > attach switch to box > screw wire nuts tight. > Wires should be twisted together before wire nut goes on > see Twisting wires & wire nut basics > note: 10 gauge wire is hard to twist: here's a trick > cut back insulation so more copper shows. |
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 For
safety, always put
connections inside box and cover with plate: |
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 cover plate over switch |
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