bathroom light does not work

[Zehroni]

the bathroom light does not work. replace it with a new one and still not working. there is electricity coming to the bulb holder when I put my testing screw driver but the testing screw driver light is very faint in comparison when I test it on a power socket for example. this give me the indication that the current is very weak. any idea why

 

[sparkwright]

You need a 2 probe voltage tester for this task.

A neon screwdriver can't be relied upon to determine the problem here.

 

[EddieM]

the bathroom light does not work. replace it with a new one and still not working. there is electricity coming to the bulb holder when I put my testing screw driver but the testing screw driver light is very faint in comparison when I test it on a power socket for example. this give me the indication that the current is very weak. any idea why

Well a testing screwdriver is next to useless, you need a multimeter, but apart from that, it's anyone's guess.

 

[terryplumb]

As said above you need testing equipment to establish where the fault is. You can check visibly for loose connections at switch and light fitting ,with power off , but not much else.

 

[Zehroni]

I have a multimeter what am I looking 240 v across the live and the natural?

 

[terryplumb]

I have a multimeter what am I looking 240 v across the live and the natural?

Yes ,and voltage live to earth ,measured at the light fittings terminals.

 

[Zehroni]

I am not home yet, so I will be looking for around 240v between the L and N & L and E any value less than 240v is the cause of the problem and in most cases is water ingress, correct?

 

[terryplumb]

Water ingress is the least likely reason for loss of voltage ,unless it has caused a protective device ,such as an RCD to have tripped.

 

[sparkwright]

Less than 230v could be a problem.

Water ingress, unlikely.
Wired up wrong possible.
Loose or broken connections more likely.

 

[Zehroni]

what is the likely cause for loss of voltage then. there is no RCD in the light circuit

 

[sparkwright]

A bad connection or wiring connected wrongly.

 

[terryplumb]

Less than 230v could be a problem.

Water ingress, unlikely.
Wired up wrong possible.
Loose or broken connections more likely.

The above are the most likely

 

[333rocky333]

Maybe the switch has failed

 

[winston1]

the bathroom light does not work. replace it with a new one and still not working.

It is a waste of money and time replacing items before you have ascertained they are faulty.

 

[Zehroni]

many thanks to whoever contributed to this thread. it was the N bad connection. visual inspection shows it is in situ but in fact it was not making good connection