http://www.wfu.edu/~matthews/misc/sw...Animation.html

Found this illuminating example for what is often confusing explained.

On 4 Feb 2005 02:44:19 -0800, "Phil"
wrote:

http://www.wfu.edu/~matthews/misc/sw...Animation.html

Found this illuminating example for what is often confusing explained.

But in the US they use different terminology. What we call a two-way
switch, they call a three-way, because it has three terminals, an so
on.

--
Frank Erskine

In article . com,
Phil wrote:
Found this illuminating example for what is often confusing explained.

Unfortunately it talks about 3 way switches where we call them two way -
which is correct. 'Way' refers to the path through the switch. The other
name is single pole changeover.

And as for an intermediate being four way...;-)

But it certainly demonstrates how the circuit works. Ideal for our
resident fool Dr Evil who needs as much help as he can get with
understanding such things.

--
*The statement below is true.

Dave Plowman London SW
To e-mail, change noise into sound.

But it certainly demonstrates how the circuit works. Ideal for our
resident fool Dr Evil who needs as much help as he can get with
understanding such things.

Unfortunately, it also doesn't show the correct cable routings. If you
implemented it as drawn, with T&E between switches and single straps to the
supply and bulb, you will generate an inductive loop, which will interfere
with hearing aids. This may have been acceptable in the past, but isn't any
longer.

Christian.

Frank Erskine wrote:
On 4 Feb 2005 02:44:19 -0800, "Phil"
wrote:

http://www.wfu.edu/~matthews/misc/sw...Animation.html

Found this illuminating example for what is often confusing explained.

But in the US they use different terminology. What we call a two-way
switch, they call a three-way, because it has three terminals, an so
on.

.... not to mention that there's a whole spectrum of confusion as to
what 'n way' means according to context.

E.g. a four-way switch could mean:-

A switch with four positions (probably a rotary switch) such that
one input can be routed to one of four outputs.

Four separate two-position switches that operate a single
appliance (probably a light or lights) such that the appliance can
be turned on or off by toggling any one of the switches regardless
of the positions of the other switches. (As in 'two-way'
switching of a landing light from bottom and top of the stairs)

What I would call a four-gang switch, i.e. four separate
two-position switches in a single face-plate. (To my mind this is
an incorrect usage of 'four way' but I'm sure some people use it
this way)

What I would call a four-pole switch, i.e. one that controls four
independent circuits with a single operating lever/handle. (Again
I would regard this usage as incorrect)

--
Chris Green

On Fri, 4 Feb 2005 11:28:42 -0000, "Christian McArdle"
strung together this:

Unfortunately, it also doesn't show the correct cable routings. If you
implemented it as drawn, with T&E between switches and single straps to the
supply and bulb, you will generate an inductive loop, which will interfere
with hearing aids. This may have been acceptable in the past, but isn't any
longer.

Oh yes, forgot about that! ;-)
--

SJW
Please reply to group or use 'usenet' in email subject

In article ,
wrote:
... not to mention that there's a whole spectrum of confusion as to
what 'n way' means according to context.

E.g. a four-way switch could mean:-

Not really any confusion. Way means route.

--
*Many people quit looking for work when they find a job *

Dave Plowman London SW
To e-mail, change noise into sound.

In article ,
Christian McArdle wrote:
But it certainly demonstrates how the circuit works. Ideal for our
resident fool Dr Evil who needs as much help as he can get with
understanding such things.

Unfortunately, it also doesn't show the correct cable routings. If you
implemented it as drawn, with T&E between switches and single straps to
the supply and bulb, you will generate an inductive loop, which will
interfere with hearing aids. This may have been acceptable in the past,
but isn't any longer.

Yes. However for the purposes of showing how it works - ie a theoretical
diagram - it's ok. Practical wiring almost always varies in layout from
theoretical diagrams.

--
*If at first you don't succeed, try management *

Dave Plowman London SW
To e-mail, change noise into sound.

"Dave Plowman (News)" wrote in message
...
In article . com,
Phil wrote:
Found this illuminating example for what is often confusing explained.

Unfortunately it talks about 3 way switches where we call them two way -
which is correct. 'Way' refers to the path through the switch. The other
name is single pole changeover.

And as for an intermediate being four way...;-)

But it certainly demonstrates how the circuit works.

You have only just found that out by looking at the animation. How are your
1.5mm ring mains getting? Have the fire brigade been around lately?



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In message , Christian
McArdle writes
But it certainly demonstrates how the circuit works. Ideal for our
resident fool Dr Evil who needs as much help as he can get with
understanding such things.

Unfortunately, it also doesn't show the correct cable routings. If you
implemented it as drawn, with T&E between switches and single straps to the
supply and bulb, you will generate an inductive loop, which will interfere
with hearing aids. This may have been acceptable in the past, but isn't any
longer.

Pardon ?

--
geoff

"raden" wrote in message
...

Pardon ?

Maxie, what have you done?


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In message , Doctor Evil
writes

"raden" wrote in message
...

Pardon ?

Maxie, what have you done?


You really should revert to calling yourself DIMM, much more suitable

--
geoff

Pardon ?

The cable route suggested isn't acceptable for practical purposes, although
it is good for giving a clear indication of how it works. The cable routing
shown forms an inductive loop and probably breaks the Disability
Discrimination Act. However, the routing shown was in common use some time
ago.

Christian.