Wiring a replacement PIR lamp with permanent live.

[Alex A]

I wish to replace a PIR lamp which has failed. When removing the old lamp, there were five wires 2 live, 2 neutral and an earth. However the two lives were connected outside the lamp terminals. Is this safe and, if so, how should the two neutrals be connected ?

Thanks.
.

 

[ProDave]

You understanding is wrong and could lead to you doing something dangerous.

You might have two brown and two blue wires (or even old red and black wires) but you do NOT nave two live and two neutral. One pair will be live and neutral feeding the light fitting and the other pair will be the drop to the light switch so one will be permanent live and the other switched live.

If done properly the switched live will have been sleeved to indicate it's function. Often it is not.

So without some testing you could very well end up with a dangerous situation.

Post some pictures as it is now BEFORE you disconnect anything for more advice.

 

[Alex A]

You understanding is wrong and could lead to you doing something dangerous.

You might have two brown and two blue wires (or even old red and black wires) but you do NOT nave two live and two neutral. One pair will be live and neutral feeding the light fitting and the other pair will be the drop to the light switch so one will be permanent live and the other switched live.

If done properly the switched live will have been sleeved to indicate it's function. Often it is not.

So without some testing you could very well end up with a dangerous situation.

Post some pictures as it is now BEFORE you disconnect anything for more advice.

You understanding is wrong and could lead to you doing something dangerous.

You might have two brown and two blue wires (or even old red and black wires) but you do NOT nave two live and two neutral. One pair will be live and neutral feeding the light fitting and the other pair will be the drop to the light switch so one will be permanent live and the other switched live.

If done properly the switched live will have been sleeved to indicate it's function. Often it is not.

So without some testing you could very well end up with a dangerous situation.

Post some pictures as it is now BEFORE you disconnect anything for more advice.

You understanding is wrong and could lead to you doing something dangerous.

You might have two brown and two blue wires (or even old red and black wires) but you do NOT nave two live and two neutral. One pair will be live and neutral feeding the light fitting and the other pair will be the drop to the light switch so one will be permanent live and the other switched live.

If done properly the switched live will have been sleeved to indicate it's function. Often it is not.

So without some testing you could very well end up with a dangerous situation.

Post some pictures as it is now BEFORE you disconnect anything for more advice.

Here’s a photo of the wires - none sleeved.

 

[ProDave]

So now you have created a problem, that you don't know which pair is the live and neutral feed, and which pair is the probable switch drop.

We try to tell people to take pictures and identify each core somehow BEFORE disconnecting anything but it falls on deaf ears.

Most PIR lamps these days come with a flying lead, so your first job will be to fix a waterproof junction box to the wall to terminate those cables, and then when you have identified which is which you can terminate them and then connect your new light.