Blue, Brown and Grey wires

[FluxyCored]

So we have a two way light in the hallway and I disconnected the light and replaced it with a new one. The one thing I couldnt understand was the grey wire.

 

The electrician who rewired our house for some reason, but a grey one in there. So i thought it was another live wire. In this scenario, there were 3 neutral (blue), 1 live (brown) and 1 grey, which turned out to be a neutral. So as thinking it was a live, I put it in the neutral and tripped the circuit with a puff of smoke. 

 

So I called the electrician and told him what happened, he couldn't figure it out himself as to why he did that. He tripped the circuit himself then kind of blamed me for it.

 

Like mate, you rewired it that way, you dope.

 

It just annoyed me, he rewired it that way then blamed it on me. 

 

I'm just happy he got the light done.

 

Sorry, a bit of a ramble than a question

 

 

[SteamyTea]

I think it is to allow a neutral at the switches when 2 or 3 way switching is wanted.

Usually the neutral is up in the ceiling rose and only live and earth are at the switch. Sometimes not even an earth.

[Mr Punter]

This is why it is important to identify the wires with the correct colour sleeving.