Voltage problem. Help.

[Si Voodoo]

Hi all,

Been to fit a new bathroom lamp. LED type.

Light is very dim.

Voltage between Live and Neutral is 103 Volts.

But between Live and Earth it's 203 Volts.

Any ideas what would cause this.

I'm going back to get into the loft tomorrow and see what's happening.

Previous electrician did a runner and would not come back and fix the bathroom light.

So why the reduced voltage between Live and Neutral??

Thank you.

Simon.

 

[DPG]

Basic testing of the lighting circuit cables would be advisable. Maybe the sparky has wired it so that your lamp is in series with another? Do some R1+R2 testing. And confirm L-N and L-E back at the CU. Were you testing with an MFT?

 

[Si Voodoo]

Thanks.

Didn't have time today, but will go back and do thourough tests and trace out this circuit.

I just used a Metrell voltage tester.

Will take the full kit tomorrow.

 

[Midwest]

Or the rest of the circuit has been incorrectly connected, introducing a voltage back to the neutral, is another consideration.

 

[static zap]

Don't be too suprised when you get it to full brightness ,
but have enough leakage for it to never be off !
(hence other guy -legging it )

 

[telectrix]

if it's the last light on the circuit and all the others work OK, then the fault will not be far away.

 

[Wilko]

How are the other circuits? Do the rest of the house lights work normally?

 

[static zap]

between Live and Neutral is 103 Volts.

But between Live and Earth it's 203 Volts.

Was one with bulb+meter and other just meter ?

 

[Si Voodoo]

How are the other circuits? Do the rest of the house lights work normally?

Yes all other lights working fine.

 

[Midwest]

Until you turn that one on

 

[telectrix]

by arthur conan doyle... the case of the missing volts... available in paperback. £ 5.99.

 

[Octopus]

My money is on a missing neutral ..... do a Rn + R2 to confirm.... then fault find the circuit....

Had this just today when checking a new socket .....