Hi everyone just to let everyone know that I did my AM2 last week and I only failed on the fault finding part. I was very confident before going into the fault finding test but I lost my way and the pressure got to me. I'm so chuffed that I pass everything else.
Just to explain what the test is about in the exam they give you 7 faults and need to get 5 right all cable faults and you only allowed to used amulti meter (continuity and resistance testing), you have 2 hours to complete it.
My question is what sequence what you do the fault finding?
Would you check if your cores have a short circuit 1st Line to earth, line to neutral, neutral to earth if there no continuity then there isn't a short?
2nd would you check for open circuits using R2 method(end to end) this should all have a continuity if there isn't any you check for cross connection? Line 1 end neutral the other end
If there is no short or open circuit then you check for high resistance? Change setting on muti meter so you have Mega ohms on the screen. then test end to end for high resistance.
What I don't understand is that I had a fault on the FP200 and the discription they give me is the IR had failed while testing was done. I had to find the fault. I did my sequence In case of short and open circuit (all clear) then I did the resistance test end to end and that was reading low ohms!! The only way to get a reading between two cores but I thought you can only do that when you put 500v dc down the cores to test for IR.
Sorry for the long post if you can could you correct me if I did each test correctly please.
Really appreciate any help regarding this and thank you for your time to read this.
Just to explain what the test is about in the exam they give you 7 faults and need to get 5 right all cable faults and you only allowed to used amulti meter (continuity and resistance testing), you have 2 hours to complete it.
My question is what sequence what you do the fault finding?
Would you check if your cores have a short circuit 1st Line to earth, line to neutral, neutral to earth if there no continuity then there isn't a short?
2nd would you check for open circuits using R2 method(end to end) this should all have a continuity if there isn't any you check for cross connection? Line 1 end neutral the other end
If there is no short or open circuit then you check for high resistance? Change setting on muti meter so you have Mega ohms on the screen. then test end to end for high resistance.
What I don't understand is that I had a fault on the FP200 and the discription they give me is the IR had failed while testing was done. I had to find the fault. I did my sequence In case of short and open circuit (all clear) then I did the resistance test end to end and that was reading low ohms!! The only way to get a reading between two cores but I thought you can only do that when you put 500v dc down the cores to test for IR.
Sorry for the long post if you can could you correct me if I did each test correctly please.
Really appreciate any help regarding this and thank you for your time to read this.
