View Single Post
  #21   Report Post  
Posted to uk.d-i-y
Richard Russell Richard Russell is offline
external usenet poster
 
Posts: 249
Default Neon indicator for 3-way garage lights

On Sun, 26 Aug 2012 09:41:52 +0100, Andy Burns
wrote:

http://www.rtr.myzen.co.uk/neon.gif


Provided the intermediate [switch is|switches are] between the lamp and
the right hand switch?


That's right. It's possible the OP may need to swap a 2-way switch with
an intermediate switch to achieve the correct arrangement.

The more general topology of the N-way 'alternative' method is
(simplified):

2-way switch
Any number of intermediate switches
Load(s)
Neon(s)
Any number of intermediate switches
2-way switch

So for example it's possible to have more than one switch in the house as
well as more than one in the garage, with loads in both places, without
any extra wiring. It's just a case of ensuring that the leg to which the
load(s) and any monitoring neons are connected is the leg which joins the
house to the garage.

I've never understood why this 'alternative' method isn't more popular.
The Wikipedia article says it "can cause confusion" but, come on, it's
only wires and switches - you don't need a PhD to understand it!

Richard.
http://www.rtrussell.co.uk/