Why do some lamps and other fixtures require two turns to turn on and off?

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Why do some lamps and other fixtures require two turns to turn on and off?

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8 Answers

Anonymous 0 Comments

could be the wrong bulb, or intentional switch design.

the mechanical/physical contacts need a safe open position(enough space to not allow arcs(typically up to 600v) for safety reasons. and/or

if a three or 4 way design is re-used as a toggle the unused states can be used as arc free zones.

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