Contactor wiring help

[Jacko]

Hello, I’m need some advice on how a contactor is wired please and where the neutral go. I’m told it is connected to eco 7 and controls 3 heaters in a domestic flat. It stopped working after an electrician did something on a different circuit in the consumer unit.

The contactor is an Eaton cr2540230.

At the moment there is 3 lives coming from 3 MCB’s and they go into the bottom of the contactor in terminals 2,4 and 6.

Then 3 lives feed the heaters from the top of the contactor in terminals 1,3 and 5.

The neutral from the N bar is connected to A2 and the outgoing N is connected in terminal 7(13).

There is noting in A1.

Does this sound correct?

I’ve added a photo.

Thanks

 

[westward10]

Can you show clearer pictures of the top and bottom of the contactor.

 

[littlespark]

By the diagram on the front of the device, it looks like A1 and A2 are the coil… which would need a neutral.

If there’s no wire in A1, it’s not going to work.

 

[DefyG]

I doubt that is an 'outgoing' neutral, its probably the switched live from the controller which should go to A1

 

[Jacko]

I doubt that is an 'outgoing' neutral, its probably the switched live from the controller which should go to A1

So your saying the switched live in to A1, the neutral in to A2 and the 3 live in at the bottom and out at the top?

 

[westward10]

The black should almost certainly be in A1 but an electrician should verify this.

 

[DefyG]

Yep thats about the size of it!

 

[littlespark]

Or 3 live in the top, and out at the bottom.

Definitely needs a live and neutral across A1-A2 to pull the coil in.

1-2, 3-4 and 5-6 are just normally open switches.

 

[Jacko]

Excellent . Thank you

Why do they have 8(14) and 7(13)?

 

[DefyG]

Auxillary contacts ableit will be at a lower rating than the main contacts (6A perhaps?)

 

[littlespark]

7-8 will be the same as 1-2, 3-4 and 5-6
not sure about (13)-(14)…. It’s the same terminal.

As suggested above, the black wire in 7 showing too much copper at the moment, should be in A1

 

[westward10]

(13) and (14) normally denote auxiliary contacts often of a lower current carrying rating. Your contactor is deemed four pole so it is assumed they are the same rating as the others but are noted for auxiliary purposes also.

 

[yorkieone]

So your saying the switched live in to A1, the neutral in to A2 and the 3 live in at the bottom and out at the top?

black is a live phase colour why the didn't keep to brown no idea