Series Switch Wiring
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There is very few circumstances in which multiple
switches in series would be desired.
Switches wired in series require all switches to be
in the on position for the circuit to be on, when any one switch is off
the circuit is off regardless of the position of the other switch.
Now at the moment I think of one possible usage for this,
and that is for a cut off switch for the furnace, this switch is often
labeled with the 'ON' position on the faceplate. In an emergency
you want without a doubt know where the off position is. If you desire a
cut off in two different locations 3 way switches is not the answer as
there is no definitive position of 3 way switches as to off and on. If
you wire two basic switches wired in series you can position these
switches so that on is always with the switch up and off is always with
the switch down, both switches must be on for the circuit to be on.
For
those that live where the new 2011 NEC code is in effect, please read
2011
NEC New Rule 'Switch Connections' This new
rule applies to switch circuits that control lighting loads.
Since I could never imagine anyone using a series type
circuit switch wiring for lighting loads I have not created specific
wiring sequences for series switch wiring that meet this new NEC rule,
but just for your information the 'power source and switched feed on
different switch' would be the only option that I provided that would
meet the new rule criteria. |
Two switches wired in series options....
click on desired selection
Power Source at Switched Item
Power Source and Switched Feed at Same Switch
Power Source and Switched Feed on Different Switch
Written: Dec. 22. 2011
Revised: June 30, 2013
Proof Read / Released: July 10,2013
By: Donald Kerr
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