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How to wire water heater safety switch

control water heater with switch
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240V water heater can be controlled directly with a 30-amp double-pole switch

Rated 25 amp
Turn off both Hot wires.
Not necessary, since turning off 1 hot wire works fine. Read above
Use diagram that comes with device... my illustration shows house wires connected to bottom two screws, and load wires connected to top two screws... house wires can be connected top two scres, the result is same unless specified by product label.
A double pole switch will act as a 'power cut off switch' or 'safety switch' as required by some local codes.

Buy double pole 30 amp switches:
Leviton 3032-2w double pole 30 amp at Amazon
Leviton MS302-DS 30 amp double-pole switch at Amazon
2-pole 30 amp non-fusable safety switch/ power cut-off
30 amp switches at Amazon

Resource:
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