Immersion /Wiring

2012paddy2012

Hi
I disconnected my immersion switch some years ago as it was being used too much and when not needed!


I wish to put it back now , and I am just checking which cables go where.


I know the live feeds , the two elements , can someone explain to me which terminal takes which cable?

obviously "earth" needs no explanation , just the others. L1 & L2 , the two Live (red) cables presumably.
the two neutrals to the "N" - anything else to be aware of ? ( Ill check the red/live are "live" with phase tester) ...


Have some basic electrical experience but , feel a bit of advice is warranted , to ensure
safery.

Any advice appreciated

Paddy

Steve

From your pics, it would be a guess. Not prepared to do that.

Get a REC to look at it.

Sleeper12

2012paddy2012 wrote:

Hi I disconnected my immersion switch some years ago as it was being used too much and when not needed!

How many years ago
Safety & regulations change over the years
Connecting the immersion now to a trip switch installed 20 years ago might be illegal now.

Wiring the switch might be easy but it might be dangerous by todays standard.

Better off getting a REC to connect & to test the rest of the system

coylemj

OP, it's not possible for us to tell you which cable is which as the mains feed and the wires to the immersion are intermixed in your photo.

You mentioned 'red' twice, I don't see any red wires.

aido79

2012paddy2012 wrote: »

Hi
I disconnected my immersion switch some years ago as it was being used too much and when not needed!


I wish to put it back now , and I am just checking which cables go where.


I know the live feeds , the two elements , can someone explain to me which terminal takes which cable?

obviously "earth" needs no explanation , just the others. L1 & L2 , the two Live (red) cables presumably.
the two neutrals to the "N" - anything else to be aware of ? ( Ill check the red/live are "live" with phase tester) ...


Have some basic electrical experience but , feel a bit of advice is warranted , to ensure
safery.

Any advice appreciated

Paddy

The first problem is that you seem to be colourblind. The "reds" are actually brown.

There will be 2 separate cables. One will will a brown, blue and earth. This will most likely have a grey outer insulation. This will be your incoming supply and will be connected to L in and N in.
The other cable will have an extra core so will have brown, blue, black and earth. It will possibly have a white outer insulation. With this cable connect the blue to N out, black to L2 for the sink and brown to L1 for bath.
As you already said the earths are self explanatory..just make sure they are securely connected.

What size fuse/mcb is the immersion fed from at the board?

ted1

Take the top of the element and see what wires go there.

Work backwards

2012paddy2012

ted1 wrote: »

Take the top of the element and see what wires go there.

Work backwards

Super idea 💡 does that cap pop off handy enough ? Will be good to know which cable is which will do this evening thanks again paddy

looksee

The only two house fires in my life involved immersion switches (two different ones).

2012paddy2012

looksee wrote: »

The only two house fires in my life involved immersion switches (two different ones).

Sorry to hear that.

Ak84

Just another thing to be wary of.
New immersion requires an extra safety stat built in as the older type frequently failed in the on position and boiled the water in the cylinder.
Happened in my own house. Immersion.was left on for a full day and the cold tank ended up filling with boiling water.
I turned the cold tap on and STEAM came out.
Deaths have occurred due to this problem with cold tanks bursting with the boiling water.