Postby suntek » Sat Jan 12, 2008 1:58 pm

Hi how do i wire a switch circuit to be controlled from 4 positions it is in a entrance hall with 4 access doors so needs to be able to switch on & off from all switches a freind surgested the same as a 3 way with intermediete switchs in the 2 middle switches ???????? :?:
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Simply Build It

Postby juli-juan » Sat Jan 12, 2008 6:22 pm

u use 2 way and intermeadiate but u must get an electrician as u cannot add modify or extend circuits in domestic houses to comply to local council part p[color=blue][/color][color=blue][/color][size=18][/size]
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Postby rosebery » Sat Jan 12, 2008 7:31 pm


Errmm - yes you can as long as you don't go near the consumer unit. So you are partially correct as adding does come under Part P of Bldg Regs.

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Postby suntek » Sat Jan 12, 2008 10:07 pm

Thanks for your replys the wiring is not domestic it is in a industrial unit/office so part p does not come in to it would still like details of how it needs to be done if anyone can help ???

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Postby 333rocky333 » Sun Jan 13, 2008 1:53 am

Look in the projects for a one way switch that is how you wire the light .

Then instead of fitting a one way switch you will use a two way switch.

Using the two wires shown at the one way switch on drawing, instead connect into L1 and L2 of a TWO WAY switch for now and at this stage leave common empty.

***** Depending on type of cable used !!!! *****
You then need 3 cores and earth to link all four switches ending at the fourth switch .

Connect one of the wires to all Four switches using L1 terms
Two 2way and two intermediate switches.

Connect one of the wires to all Four switches using L2 terms
Two 2way and two intermediate switches

You will then need the THIRD wire to go from the COMMON of 1st position two way switch , to link all the way to COMMON of 4th position two way switch.
(SEE BELOW) *****

You will now have two wires in both L1 and L2 of the first two way switch ,
all other terms will have one wire.

As the THIRD wire is in the 2nd and 3rd positions as well ,join together safely with connecter blocks.
This wire just passes through PAST these two intermediate switches.

Install THIRD wire DIRECT from 1st to 4th switch.
Thus eliminating connecter blocks
Bypassing the two intermediate switches

The 2nd and 3rd switches are four terminal intermediate switches , only connect L1 and L2 both in and out

Best to draw circuit and work out best way to wire for you,as you can wire other ways also.

Obviously all must be earthed.
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Postby 333rocky333 » Sun Jan 13, 2008 2:01 am

Just copy the two way if you know that.


Then add two intermediate switches cut into the two strapper lines that are between L1 andL2.
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Postby ericmark » Sun Jan 13, 2008 3:57 am

You need two two way switches and two intermediate switches I did put it up on my web site but when I have tried to put link it has been deleted. but one slipped through on "Three two way switches on a single lighting circuit" have a look there and you will find it. There is two ways of wiring a two way switch school boy way is in on commons link S1 to S1 and S2 to S2 and the intermediate switches go between S1 and S2 cables. The second most common way the two x two way switches are wires com to com, s1 to s1, and s2 to s2, the power and light go to s1 and s2. The intermediate switches go between the s1 and s2 strappers. The second method has advantage that no junction block is required in two way switches although you will required one in each intermediate to connect the commons.

All best Eric

Postby suntek » Sun Jan 13, 2008 11:51 am

:D Thanks guys thats the way a friend surgested but thought i best check you have been a great help cheers
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