ceiling lighing issue

[tam hay]

hi all,

i have an issue i replaced a light at my door today but it keeps tripping when i take the light off the trip switch stays up, the fuse that keeps tripping has lights and the spur for the alarm system on it (no idea why they wired it like that). any ideas?

 

[Octopus]

Operator error - call a spark tomorrow

 

[Deleted member 105166]

Tam - you say "at my door" - is this an outside light?
If outdoors, have you looked at the fitting for water ingress/damage?
Is it just the MCB (switch labelled "5") that resets?
Does the RCD (double width switch at the end on the right) stay on, or does that reset?

 

[davesparks]

tam hay your only sensible course of action is to leave the circuit off and call an electrician tomorrow.

Does the RCD (double width switch at the end on the right) stay on, or does that reset?

That RCD is protecting circuits to the right of it, not this one.

 

[Toneyz]

What wiring have you got at the light?

 

[Deleted member 105166]

That RCD is protecting circuits to the right of it, not this one.

so it is, too much vino = no see arrow!

 

[Dave OCD]

Is the blank to the left of the RCD hoping to be an MCB one day ? It's wearing an L plate.

 

[freddo]

It's a solid link to connect L to the RCD.

 

[tam hay]

Tam - you say "at my door" - is this an outside light?
If outdoors, have you looked at the fitting for water ingress/damage?
Is it just the MCB (switch labelled "5") that resets?
Does the RCD (double width switch at the end on the right) stay on, or does that reset?

its an outside light took the old one off the cables coming out the wall are 2 red 2 black 2 earth, there is no water ingress or damage that i can see and it is just the mcb that resets if i disconnect the light the mcb stays on

 

[freddo]

How did you connect each of the wires to the light?

 

[Toneyz]

How did you connect each of the wires to the light?

More importantly, how was the old fitting connected? Has or did one of the black cables have a red sleeve or tape on it? In the old fitting was both the reds in a terminal block together but not to one of the light terminals.

 

[tam hay]

the old light had two black wires going straight into the bulb holder the 2 red wires and the 2 earth wires were in seperate terminal blocks

 

[freddo]

Did you connect the new light in the same way?

 

[tam hay]

no because the red was live so connected that to the brown wire from the light black to black and earth to earth the light worked but when i turned the switch off the mcb tripped so i looked at the wiring in the switch it had black as live red as common and earth so rewired the light and it still kept tripping the mcb

 

[freddo]

no

The old light was wired correctly, by changing the wiring the new light is now wired incorrectly.

 

[tam hay]

that will mean the new light will not have an earth or netural connected to it?

 

[Andy78]

Please get an electrician in to sort this for you.

 

[freddo]

The earth will of course need connecting to the new light. The old light had live and neutral connections to it. Have a look at lighting wiring diagrams and all will become clear. Then call a good local electrician who will be able to safely connect the new light.

 

[GeorgeCooke]

As the old light worked why did you knew better and connected the new light differently?

 

[tam hay]

every light,switch or socket its been like for like but the old light had two black wires straight to the bulb holder which comes from the l1 l2 in the switch the red were twisted together same as the earth. so if i runthe black wires to the live is it going to work yes or no.?