RCD

[young5]

Spark123 - I think they were electronic ballasts.
An IR test would not identify this would it ? That is if you can do An IR test on this type of circuit with electronic ballasts on ?
Would the test method for this be to disonnect the whole circuit and then add 1 fitting at a time to the circuit to see which is causing the fault ? Or is there a better maybe even an easier way to test for this ?
What about an IR test at 250v and expecting 4M ohm ?
Thank u in advance again

 

[holmslaw]

..

 

[Adam_151]

Follow holmslaws advice, but do the LN->E insulation test on 250v first, only whack it upto 500v if the 250v test gives a reasonably clear result.

... It wouldn't be first time that a low result has turned out to be N and E connected the wrong way round in a fitting

 

[maguire]

You have to differentiate between what you want to test, the circuit or the connected loads if you dis connect everything connected to a circuit then you can test it at what you like but 500V is the norm for LV and it may be of help to look up definitions for a LV circuit, if you suspect a faulty lamp or what ever the best test is by substitution by a known good one, or remove that one from ther circuit if all else is fine then the unconnected unit is at fault Also make sure everything is removed from the circuit under test, for example today a returned to finish of a job and nail a ring that was failing IR. Cause ? a socket behind a curtain I missed yesterday with an ambi pure plugged in and switched on, So we can all get caught out now and again Best of luck
DM