Zs test at last lighting point reading "trip:"

[baazab]

please can anyone help.zs on lighting useing 3-leads .where do they go im useing megger mft1553.

 

[Guest123]

It shows you in the manual.

 

[Amp David]

Never ever had my 1552 trip a 6 amp MCB when testing loop on high current setting.

 

[baazab]

thans for reply,but manual is not takeing me anywhere.

 

[Guest123]

Megger Manual

Try this, page 4.

 

[baazab]

lenny one more question pls.I HAVE 3-LEADS COMEING OUT FROM MY MEGGER,looking at the one way switch for the lighting i can see brown-com switchwire-L2 and earth CNNECTED TO THE META LBOX,MY Q IS WHERE DO THE 3-LEADS FROM THE MEGGER GO TO.

 

[Sintra]

No offence baazab but by the sounds of it you don't seem competent enough to be messing about on a live installation.

 

[baazab]

Im testing my own board for my 2391exam

 

[Sintra]

Sorry mate, for a 3 lead test with the megger you need to test at a point on the circuit that has a neutral ie. the light fitting or rose.
The green lead connects to the earth the black lead connects to the neutral and the red lead connects to the switched line.

 

[baazab]

Im testing my exam board for my 2391 exam,canyou help please

 

[baazab]

Sintra thanks for that information,so you saying you cant do zs from a one way switch,pls correct me if i understand you wrong

 

[Guest123]

As my esteemed colleague has said in order for 'no trip' test with an MFT you need a neutral present. With only L&E present you can only use the high current loop test function.

Again Page 4 of the link I posted shows this.

 

[Sintra]

Not on a circuit that is RCD protected and has no neutral in the switch. For an RCD protected circuit you have to use the no trip setting on the meter and 3 leads which means you need a connection to neutral.

If the circuit is not RCD protected then use the high setting with 2 leads (red & green) connected to line and cpc in this case it could be tested at the switch.

 

[baazab]

Sintra and lenny you been very good i just wantto say thanks,zs is clear i can do it.

 

[Amp David]

2391 good luck baazab, sounds like you've cracked the practical, don't know about the written part though