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pfc

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  1. J

    What the max difference PFC for TNC-S for PEFC / PSSC

    Hi I was wondering if anyone could let me know what the max difference in PEFC and PSSC in a TNC-S system: I ask as I measured PSSC 3.8kA & PEFC 3.0kA and have never seen it that far apart on a TNC-S before. This was repeatedly the case, the tails are 25mm, 1m in length and the EC is 16mm...
  2. A

    Megger 1553 - possibly damaged from PFC test

    Hey, I have a Megger 1553 and lent it to a friend, who is an experienced spark with 2391 and good knowledge/experience of testing. However, friend carried out PFC test using 3 leads, even though PFC should be carried out using 2 leads on this unit. Since PFC was carried out incorrectly the...
  3. S

    High PFC

    A fuse box I was working on the other day (doing such things as providing a main earth connection to the fuse box, which I can only assume was missing for years) looks like this: Having installed the main earth, the PSSC is 8.5kA. Must be close to the transformer... The mcb 3rd from the left...
  4. J

    Hi Ze & Pfc

    Hi, I was testing 2 shops today. One had 2 x single phase CU's & one had 1 single phase CU, all supplied from the basement which had the 3 phases down there. On one board the reading i got were all fine, but the other 2 i had a reading of Ze: 4.61 and Pfc: 59A. This is very high which means a...
  5. R

    Zs and PFC

    Hi This is my first post, I recently got 2382-10 and have started to study for my 2392. I understand there will be new qualification instead of 2392. Is this correct? and comming to the point I changed a single socket and then used Megger 1710 to test phase to earth and phase to neutral loop...
  6. La Poste

    Quick PFC question.

    I have just been asked a question by a friend of mine and am not sure of the answer. He has done a PFC test and found it to be 8.5 KA. The main fuse is rated at 33KA but the MCB's (60898) are rated 6KA. He has asked me if it will be compliant as the main fuse is rated higher than the PFC but...
  7. P

    Am2 pfc

    Im confused about doing the PFC test in the AM2, i no you have to test N-L1-E, N-L2-E, N-L3-E but im not too sure whether i have to test been phases i.e. N-L1-L2 or E-L1-L2 any help on how to properly test PFC in the AM2 exam would be great help thanks!!!
  8. K

    NICEIC Certification Scheme Safe Isolation for NICEIC assessment (and PFC question)

    Mine is tomorrow...... and I think I'm just about ready! :ninja: Just wanted to see what you guys thought about safe isolation, and whether or not I should be pulling the main fuse before taking off the CU cover to do dead tests. Will the NICEIC assessor be happy with me just turning off the...
  9. M

    pfc testing on three phase with fluke 1561

    Don't do much three phase and a bit of help would be helpful.On three phase when testing for pfc am I right in saying that I connect the leads to L-N and don't need the earth lead connected. As I'm not sure of putting the meter across all phase, so double the reading that is highest of the three...
  10. D

    Correct Way of getting the PFC

    I've always thought it was ok to get your pfc when getting the Ze. I never been flagged up by NIC for doing it this way etc before. However, I've now been told I should perform Ze seperately and the PFC separately as all the earths need to be connected. It makes sense as it should be a lower...
  11. G

    High PFC

    Today I have been doing a PIR on a builderS merchants. The main 3phase DB is an old Melin Gerin board and the installation has a Ze of 0.06 with a PFC (PSCC) of 4.9x2=9.8KA. The MCB's within the board are rated between 3-6KA however the service fuses are 100A 1361/2 rated to 33KA Does the board...
  12. B

    low PFC

    evening I've just doing some domestic periodic inspections today and 2 of my properties gave me low PFC readings of 0.52pfc, 0.40 Ze and 0.47pfc and 0.44 Ze both systems were TNS. Are these considered as a low reading as they are to what i would normally expect? and is the a lower limit to PFC? ta
  13. T

    Megger 1553 & PFC

    Hi In training at the moment just brought a Megger 1553 can anyone tell me how to connect to establish the PSCC at origin - I have done the earth using 2 leads red - line \ green - earth and reading was 4.7Ka When I then move the green to the neutral reading shows <1 A - what setting should...
  14. i=p/u

    pfc

    how do you get pfc measurement, is it u/ze? it says 0.9KA and im geting 0.4KA, its 230v and Ze is 0.58??? hmmmm help
  15. R

    KT65 Multifunction on PFC AND PSC 3 lead or 2

    ANyone got a KT65, can let me know the PFC and PSC test is 2 or 3 lead... seems like does both. Can see it has a separate setting for PFC/PSC and another for LOOP with LL LN or L-PE so was wondering.
  16. O

    High PFC

    Hi all i have a question regarding a high pfc and installed mcbs. can i rather than replacing every mcb incorparate a main breaker equal to the pfc ?
  17. P

    Expected results of PFC test

    Hi all I'm doing the last leg of 2330 Level 3 in a week and I know there is a section about expected test results. I'm up on everything but the Prospective fault current; I know that you write down the highest reading out of Prospective Earth Fault/Prospective Short Circuit Current on the...
  18. N

    PFC Calcs

    Hi I am confused with my readings for Pefc as my Ze is .09 which would give me 2.55Ka but when I test PFC on my meter I get 5.62Ka? Ze, Neutral and earth leads clipped on disconnected main earth, probe Line on Supply side? Can I check I am doing this correctly;3 lead PEFC piggy back...
  19. G

    pfc psc ??

    Could someone explain to me how to calculate Psc and pefc? Thanks a lot
  20. G

    Very Low Ze & Very High PFC

    Hi So today i tested at the orgin of the installation and on my MFT 1552 Megger, i got a reading of <0.01 for Ze and >19.9 KA for PFC, it's a medium sized industrial unit and is fed from a substation about 30 meters away, so i expected it to be low. Obviously the client wouldn't let me switch...

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