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One contact that can meet either of two others.
Also known as: Two-way switch symbol, SPDT symbol, Single pole double throw
A changeover contact connects a common terminal to one of two others, so it does not just make or break but redirects. It is drawn as a hinged line reaching between two fixed contacts, and is the basis of the two-way lighting circuit found in most stairwells.
Denotes a switch whose common terminal connects to one of two alternative contacts rather than simply opening and closing.
Contexts: Technical drawing, Electrical equipment
Is the contact arrangement behind two-way lighting, where two switches at different places each control the same lamp.
Contexts: Technical drawing, Electrical equipment
A hinged straight line pivoted at one terminal and able to rest against either of two others drawn above and below it.