Room thermostat wiring

[ARW]

I like that.

[charles]

There should be a switched live to the thermostat, It's the thermostat that does the switching and it gives a switched live on pin 3. Pin 2 is the neutral INPUT going to the heater element which gets its live from pin

1. If you can't read a very simple circuit diagram, should you be doing this work yourself?

[charles]

CORRECTION

There should NOT be a switched live to the thermostat, It's the thermostat that does the switching and it gives a switched live on pin 3. Pin 2 is the neutral INPUT going to the heater element which gets its live from pin 3.

If you can't read a very simple circuit diagram, should you be doing this work yourself?

[Maxwell Boltzmann]

OK, then. In the diagram, the wires coming out of the wall are represented by the coloured lines. Which is the switched live?

Which is switched.

You don't say.

[Andy Burns]

In the diagram Adam supplied - the yellow wire is switched live.

[Robin]

Everyone started off a virgin!

And the fact the OP had the nous to ask before making the connections is a better start than some.

[charles]

No it isn't. The switch in question feeds the outgoing switched live and also live to the other end of the heater (represented by a zigzag line).

[charles]

True. But he seems to keep insisting on "switched neutral" - evena fter he is ntold it isn't switched.

But it reminds me of a letter the BBC once reeceived " I think there should be a book written about how Ceefax works. Please tell me so that I can write the book."

[Steve Walker]

Do you think that there might be a misunderstanding here and that he is talking about the live *TO* the thermostat being switched by a timer?

SteveW

[Maxwell Boltzmann]

There is no thermostat. Where is the switched live?

[Andy Burns]

What do you think a Honeywell T 6303 is?

At this point I'm going to slow back away and leave you to it ...

[charles]

[John Rumm]

If its marked with a double insulated logo (square within a square) then it does not mater if it is made of metal.

What model number?

Are you sure its not just a set of "no volt" contacts? (i.e. a switch that closes, but is not connected to either live or neutral itself).

[John Rumm]

How would you describe the CH on connection from a programmer then?

e.g. pin 4 on the junction strip:

[tabbypurr]

Years ago I saw some of those marked [[]] but in reality they did not take the relevant precaustions and the live connection was very close to the metal case. I don't remember the brand.

NT

[John Rumm]

In much the same vein, you can get lots of LED lamps from China that "must be earthed" and provide a wire for you to do so. Only problem is there is no continuity between said wire and the metal case.

[Andy Burns]

My cheap chinese "20" watt LED floodlamp was like that, but it's died now. I have an iSpot 30W to replace it with, it is surprisingly large and basically all heatsink ... not fitted yet.

[ARW]

Which comes back to the question I asked earlier that everyone missed.

Does the boiler actually work without the missing roomstat?

It makes a massive difference to how you do the job.

[Maxwell Boltzmann]

[etc]

Thanks Roger. I seem to have misled people here by my rather flippant remark above, challenging the use of the phrase "switched live".

I already know precisely how the thermostat works, I can even identify the connection wires myself if I want. I was just asking to see if there's a simpler way to do it than by tracing them back to the boiler control box.

As to Adam's question, Does the boiler actually work without the missing roomstat? A: I haven't tried it yet. Why do you ask?

[ARW]

What are you hiding?