PIR security light circuit fault

[tkeddy]

I hope you can point me in the direction of a solution to the below.


1.5 mm twin and earth used to form circuit from 5A fuse on consumer board to 5A switched fused-spur which then feeds a PIR security light.

Everything works fine for about 2 or 3 days then the fused-spur fuse blows and also the 5A fuse of the board.

This is the only circuit fed by the 5A consumer unit

Its such a simple cicruit that I have checed and relayed twice that the only conclusion I can draw is that the PIR security light is faulty

Any help would be much appreciated

 

[fattony]

What is the load?

You could try disconnecting the light put cables in connector block and power up circuit, does the fues blow then?

However I guess your load is above 5A

 

[tkeddy]

Hi, thanks fo your rapid reply

Wrt the load - I have also tried fitting 13A fuse to both consumer unit and fused-spur and the thing still blows

Take your idea about removing the light etc and seeing what happens -

How can I check the load from the light ?

T

 

[industryspark]

from your post your set up is....

5A fuse in CU----switched fuse (used as light switch)-----pir light.

correct?

dont think the load is an issue, what wattage is the PIR light!!

there is more than likely a fault on the circuit somewhere or maybe the light is faulty. will the power stay on ok if the fcu is switched off? if so it probably elimanates a fault up to this point in the circuit.

could water have entered the light?

 

[tkeddy]

Thanks for your reply. Your description of ciruit is correct

Have already replaced all wiring except that from fused-spur to light.

So plan now is to replace that and check for water ingress into PIR etc

Wanted to checked I wasn't doing anything foolish !

Thanks
T

 

[Steve]

he still hasnt told us what wattage it is.

 

[breezer]

I suggest you get a new light, they dont last that long

 

[breezer]

yes, but since he never said it was a new light it must be old, hence light is kaput

 

[Steve]

yes, but since he never said it was a new light it must be old, hence light is kaput

a bit presumptuous?

but yes, the light is probably kaput

 

[breezer]

i wasnt being presumptious, it was dedcution

 

[tkeddy]

Sorry guys - the wattage is a huge 60W !

Light is about a year old and never worked properly - always fusing.

Will let you now whether it was wiring to light from spur-switch or the light itself

thanks again

t

 

[tkeddy]

And before you all ask - mot its not on my property ! It my mother in laws !