Flickering light circuit

[mswesty]

Hi, called to a job where the "lights flicker"
Old rewieable fuse board with no RCD 5A light circuit which does flicker randomly every 20>30 seconds or so, no other real loads on .

Stripped the light circuit and found the first light on the loop in system , connected this back up and left the rest disconnected and still the same .
I then removed all other fuses to ensure no other circuit had an effect , still the same.
Finally I rechecked all connections / tightness and plugged a lamp in to a socket directly below the board , with nothing else connected and the lamp still flickered.

I feel it's a external influence but have no specialist test equipment to monitor , could any body throw some light ( non flickering ) on these types of problems?

Cheers

 

[Plonker 3]

Have you tried a different lamp?

A friend of mine used to live near the transformer and he had this problem regular on only one light fitting as it use to sway on the voltage depending on demand in the area. May be worth asking the neighbors if they have a similar thing happening to them

 

[mswesty]

hi thanks for the reply, the whole house flickers, I asked about the neighbours and they have no problems, I put my megger across and it maintained 234v all time but that carries no weight in my minds eye.

Have you tried a different lamp?

A friend of mine used to live near the transformer and he had this problem regular on only one light fitting as it use to sway on the voltage depending on demand in the area. May be worth asking the neighbors if they have a similar thing happening

 

[Plonker 3]

hi thanks for the reply, the whole house flickers, I asked about the neighbours and they have no problems, I put my megger across and it maintained 234v all time but that carries no weight in my minds eye.

If you have checked all the connections maybe worth fitting a voltmeter that reads the voltage constantly for a couple of weeks to see if the voltage fluctuates occasionally.

May also be worth carrying out a IR and R1+R2 test too including on the flex of the fitting.

 

[Jimmy Boy]

So it's an old wiring system on a three plate ? Single P ? You have 'Pulled the fuses' but of course the fuse normally breaks the Line not the N so have the circuit out the board and I R it and do a r1 and r2 after pulling all the vulnerable out
J

 

[krellaw]

Sounds external, Tried isolating it low wattage lamp on the ring ? only had it once before crappy neutral connection in main switch. but it was only the fan across the road in a glass factory kicking in that caused the flickering, sundays it didn't flicker

 

[nathandance1996]

where do you live? if you are in the south we have been having voltage fluctuations that have caused lights to flicker or turn off, but these have eased now.