Understanding the common wire

[Spoon]

Close but no Cigar.

well bugger me.... (not literally....)

 

[Silly Sausage]

Never noticed the C, L1, L2 on light switches? Guess what the C stands for?

To sum up (I think!), it's a wire, connection ... whatever, that is shared.

That, or it's cable manufactured on Merseyside.

 

[Deleted account]

Common in a heating system is the fixed live ( sometimes but not always permanently live) in a switch device i.e. Room stat, cylinder stat, programmer port valves etc...

 

[davesparks]

Hi all,

I should have been more spe, I apologise. It’s in relation to central heating wiring.

You don't normally describe any particular conductor as being the common conductor in a central heating system.

You have various switch contacts which are normally labelled as being the common for that particular switch,such as in thermostats, relays etc.
In this case the common contact is the contact which you normally connect the incoming Live to, this could be a permanent live or a switched live from an upstream device. For example a switched live from the programmer would normally connect to the common of a thermostat.

 

[MJPD29]

It is generally a bit like an Input contact, under most circumstances the common will flow to the normally closed (n/c) but then when switched by say a contactor or switch will move onto the normally open (n/o). If I knew how to add a picture it would probably help the vague description lol

 

[GMES]

Katie price

 

[Edtwozeronine]

Never noticed the C, L1, L2 on light switches? Guess what the C stands for?

Man makes a good point, innit!

 

[FatAlan]

Generally situated below the Jacob Rees-Mogg wire.

 

[FatAlan]

Generally situated below the Jacob Rees-Mogg wire.

 

[PEG]

Generally situated below the Jacob Rees-Mogg wire.

Stop it....he's my lad's hero