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PostPosted: Thu Feb 14, 2019 10:20 pm 
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Thought this might be of interest, there always seems to be queries about light switching

https://www.youtube.com/watch?v=jYFVsUqY6zc


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PostPosted: Mon Feb 25, 2019 6:51 pm 
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I found the USA terms odd, to me two way means the switch can switch between two supplies i.e. red lamp or green lamp. Although same switch can be used to control one light from two switches.

Three way means can do any of three functions i.e. red amber green lamps, for a flick switch this would need a centre position.

Change over switch often used to to swap direction of a motor, often with a centre off, however for lights often called an intermediate switch. Does seem odd two way switch so called because of what it does, and intermediate named for it's position in the circuit.

I prefer the use of L1 and L2 permanent line and line to bulb, with com just connected between the two switches as this is the same when the switch has a S terminal and uses electronics for slave to tell master what to do.


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PostPosted: Mon Feb 25, 2019 7:57 pm 
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The thing for me about that video is that it is a "how it works" diagram, not "How it's wired" diagram, and so is little use to most folk.

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