functional

functional

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  1. W

    What is an example of functional earth?

    Doing some college work atm and come across a question asking me to provide an example of functional earth. I asked my boss at work but he doesn't even know what it is. The regs says " Earthing of a point or points in a system or in an electrical installation or in equipment for purposes other...
  2. M

    AM2 Functional Testing

    By what methods can you check functional testing during AM2. I am aware there are no loads attached i.e light bulbs, co2 dectector, motor so how will you check these operate when the switches/isolators are turned on/off. Or can functional testing just be checking the switches/isolators...
  3. L

    Use of cpc as functional earth in appliances

    some time back a customer rang up saying a tenent was getting shocks from a shower .Investigation revealed the problem lay with a broken cpc (caused by new insulation installers) resulting in a voltage of approx 27 v on the metallic parts of the shower .However the finger of blame was initially...
  4. Ian1981

    Rcbo neutral and functional earths

    Thoughts on this please, functional earth leads obviously showing signs of heat damage, the greenish coloured neutral leads compared to the blue ones are coloured throughout their length, maybe heat has caused this?
  5. C

    UK FC-7671 Functional calibrator

    I found anFV-7671 Functional calibrator in my garage, in its case. It was left by my ex some years ago when we split up. Can anyone tell me if they have a second hand value & if so roughly how much. This seems to be in very good condition.
  6. ELECNEWT

    RCBO with Functional Earth Lead.

    I have read somewhere, (but I can't locate the source), that because the RCBO's electronic control operates at a very slightly higher potential than earth, there is a very small leakage to earth through the functional earth lead. Is this correct or is my memory playing tricks?
  7. Adam_92

    Disconnecting the functional earth on an rcbo

    I know it’s good practice to disconnect the functional earth when doing an insulation resistance test but my assessor has told me that he thinks you should disconnect the functional earth when you measure Zs? Which I don’t understand does anyone else do this? And is he correct?
  8. GBDamo

    MCB as functional switches??

    What are peoples thoughts. From the BYB “Circuit-breakers and RCDs are primarily circuit-protective devices and, as such, they are not intended for frequent load switching. Infrequent switching of circuit-breakers on-load is admissible for the purposes of isolation or emergency switching. For...
  9. Gavin John Hyde

    Functional earth fly leads and rcbos

    Whats peoples approach when dealing with the earth fly leads on RCBOs? Got a board to fit next week and the bits arrived today. So been busy getting rid of packaging and putting bits together ready and checking its all arrived. Hager say you can trim the fly lead and nuetrals down if needed as...
  10. Zdb

    RCBO functional earth wire

    Hi guys, so the situation is this... I've been asked to replace some MCBs with RCBOs as they're for ring-mains/socket outlets. The white functional earth lead on the RCBO isn't long enough to reach the earthing terminal. If I use the exact same cable type/size can i extend this so it will reach...
  11. H

    Rcbo functional earth location

    When wiring an rcbo where do you tend to put the functional earth? I'm assuming it will be tricky to ensure the small functional earth will get a good grip when placed with its corresponding cpc, so do you put your functional earth in its own terminal?
  12. H

    Functional earth

    Why can't a functional earth current be carried by the neutral conductor? Ie in cases of electronics like computers there will typically be a level of earth leakage, but why can't this be designed to be carried out via the neutral, why does it have to go via the earth path?
  13. G

    RCBO earth reference tail

    What is the purpose of the white lead from RCBOs? What does it do?
  14. J

    Measuring Zs with RCBO

    Hi everyone, I've read that when carrying out earth fault loop impedance test we have to disconnect the functional earth of the RCBO (in case there's one) from the earth bar to avoid misleading result. Is that correct and is there anything else we have to disconnect? I know about carrying out...
  15. driverman

    FC-7671 Functional Calibrator instructions

    hi Guys, I've tried to search on Google. I'm looking for MI for above calibrator. Any one know of a link or a site that I can down load instructions from please. IT and me don't go together!
  16. Luminous

    Faulty functional test on RCD EICR

    Hi guys, what EICR code would you give a faulty 'functional test' on an RCD. Values all test fine at half,1× and 5× but nothing happening when i press the test button. Regards
  17. M

    Testing if out-dated bonding still functional

    Hi Folks I am a plumber and have recently had to replace a couple of old pipes that had old bonding connected to them - black cable cross bonding the two pipes and then going off under the floor boards. Normally I would simply replace this bonding. The issue here is that a section of the...
  18. S

    State why functional testing is carried out

    On completion of electricial installation testing in a shop and and office area the functional checks are to be carried out . State why functional testing is carried out. I would say to test the mechanical side of the device.
  19. P

    Functional Switching

    Guys Need advice on warehouse lighting functional switching. We are utilising 4pole 25A lighting busbar using 2 phase, neutral, and unswitched live for emergencies. My question is I'm after some advice on lockable functional switching for maitenance. We have 53 rows of busbars and I'd rather...
  20. tank

    rcbo functional earth

    hello, does the functional earth of a rcbo have value of loop impedance that has to be met in order for it to work as designed?

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