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Is there any way to have both the automatic relay function of something like the i-Vac Automatic Vacuum Switch Box AND a remote switch for the same vacuum? For example, I want my table saw and mitre saw to turn the vacuum on when they are started, but I also want to use the vacuum for hand held tools and general cleanup. The vacuum and outlet it is plugged into are hard to reach so I want a remote for the latter scenario. I can’t seem to find anything with both options or evidence of whether putting two different systems in-line would accomplish what want.

Thanks in advance.
 

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yes. you can run "parallel" lines to the motor. one from the auto switch, one from the remote switch
BUT they must take power from the same 'leg' (110v) = preferable from the same circuit and observing the properly polarity.

if you power one switch from one leg and the other switch from the other leg of a std 220v residential service, you'll get 220v followed by sparks and smoke.
 
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