Two way switching plus intermediate

[La Poste]

Greetings.

I am pulling cables through a conduit system next door and have a question. The lights will be two way plus intermediate. I have attached a link to a diagram:

View attachment WiringDiagrams (1).pdf

The diagram picture number 3 shows "two wire switching plus intermediate two wire control", this would really help me.
It would be just right with the amount of space I have in my conduit.

However I wired a switch this way at college once and my lecturer said it was rubbish, no one would accept it and I must do it again wired as picture number 5 "two wire switching plus intermediate three wire control."

Is it OK to wire like picture 3 "Two-way switching plus intermediate 2 wire control" or is this a big No No.

I mean I can't see why not, if I haveto wire it as "three wire control" I would haveto terminate everything in the switch and really stuff the conduit with wires.

Comments would be appreciated.

Thanks.

 

[DurhamSparky]

do a job do it proberly!!

 

[La Poste]

Well what's properly?

Two wire control or three?

 

[johnboy6083]

the 2 wire method is absolutely fine mate, and i have wired a whole boiler in a power station that way.
The 3 wire method is better for domestic situations where you have no containment.

 

[La Poste]

No containment, what do you mean?

 

[topquark]

No containment, what do you mean?

Conduit, trunking etc

 

[johnboy6083]

well for the 2 wore method to work, it will probably require a single switch wire from the switch, to the fitting. This will not be able to bhe incorporated into a cable unless you have spare cores.

 

[La Poste]

Conduit, trunking etc

Well I have plenty of conduit.

I was thinking of using this job for my assessment, maybe the assessor will hate it.

well for the 2 wore method to work, it will probably require a single switch wire from the switch, to the fitting. This will not be able to bhe incorporated into a cable unless you have spare cores.

There will be no spare cores, it is all wired in singles.

The three wire control must be for when we use T and E cable not singles.

 

[johnboy6083]

exactly my point mate.

 

[micknew]

Get a qualified electrician in before you kill someone!

 

[topquark]

It's a horses for courses ... 3 wire domestic (probably) two wire if your doing stuff involving conduit (coz it's cheaper to run the two singles).

 

[La Poste]

Get a qualified electrician in before you kill someone!

No one's going to die

 

[topquark]

You'll also save yourself a connector on the intermediate if you do it using two wire

 

[La Poste]

You'll also save yourself a connector on the intermediate if you do it using two wire

It's loads easier, in this particular case it really is.

 

[SPARTYKUS]

Get a qualified electrician in before you kill someone!

Crikey thats a bit harsh & conclusion jumping isn't it?

Sir, return your tankard!