Is it a neutral wire break?

Question

Good evening,

A few weeks ago I wanted to disconnect the lamps in my bedroom (several 12V lamps) (they were converted from 230V to 12V by a transformer), because I wanted to install normal 230V ceiling lamps.

I have two light switches, each of which controls several 12V lamps.

There was also a 12V cable system stretched over our stairs, and I wanted to replace this with a normal 230V ceiling light.

A transformer was connected in each of the three circuits.

Before uninstalling I measured -> the transformers were at 230V.

Took out the fuse, measured again -> no power -> disconnected everything -> I first disconnected the two lamp circuits with Wago, since I didn't have any lamps yet and for now I only installed the lamp above the stairs.

Power on -> lamp didn't work -> voltage measured -> suddenly only 130 V was coming through. The two disconnected cables also only received 130 V.

In addition, the power in the next room went out and an outdoor lamp no longer worked.

After some research, I realized that it was most likely a neutral wire break.

Makes sense, but where is the neutral wire interruption now? I only disconnected three transformers.

But if I were to remove two ceiling lights somewhere, would the rest of the circuit still work?

Is it a neutral wire break or what else could be the cause?

Thank you in advance.

doktorelektrik · Answer

You have solved an additional clamping point, not only that of the 3 transformers….

Frequently, something like this happens at can terminals, which should only be used carefully.

This is the reason why these works are only allowed to be exercised by Electricians . You'd better take him to NOW.

Good luck!

jxnnxshxnk · Answer

As you obviously don't know what you're doing, I guess I'll leave this thing to an electrician. A remote diagnosis based on an image and a sharp description is not possible.

Get an electrician who looks at the Bastelei there, fixes the mistakes and installs your 230 V ceiling lamps. As a layman, you can't do such works anyway. And for good reason.