4 way switch

238

04:28:35

In a four way circuit, there is a 4 way switch between two 3 way switches. If you don't know what those are, think of a DPDT switch in between two SPDT switches. I had to make a DPDT switch using relays. 
{*} {* *} {*}
{*} {* *} {*}
{*} {* *} {*}
 ^    ^ ^    ^-switch 3; SPDT
 ^    ^ ^-switch 2; DPDT
 ^-switch 1; SPDT

{C}   {E E}   {E}
{A}   {C D}  {B}
{D}   {F F}   {F}

A connects to B when the circuit is closed. 

If this doesn't help you here it is with numbers:

{1} {4 4} {4}
{2} {1 3} {6}
{3} {5 5} {5}

I really don't know how else to explain it.

I added in the smaller circuit on the right to demonstrate a 3 way circuit. 

published 10 years ago

voluharw

10 years ago

Good stuff!

rich11292000

10 years ago

The wiring method and product is a 4 way switch, 4 terminals plus device ground, a DPDT has 6 terminals plus ground. It can function the same in this situation except the 4 way will not allow current flow if its not hooked up perfect, this additional polarity protection on a 4 way will not allow any switching on the grounded conductors. The spdt is the exact same as 3 way switch with exception of terminal location, I do not know if they have polarity protection. 2 spdt/3 way switches makes the 3 way wiring method.

slaymaker

10 years ago

Thanks sorry about that

yank141

5 years ago

test

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