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confusion

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  1. H

    Mcb confusion! (talisman plus)

    Hi Guys, I'm having a few problems identifying and replacing some mcb's/rcbo's from a water damaged consumer unit. They are type C20 talisman plus but I can't figure out what size they are and have been told they are mem "2" ?!? Now my normal supplier for standard stuff say they can get them...
  2. V

    Slight confusion on what I am able to claim back

    Hey guys. Just a quick question here. I have only been self employed since April. I am registered as a Sole Trader under the CIS Scheme. I keep hearing on the radio about how we must now do our self assessments. So I registered for self assessment and was waiting for an activation code through...
  3. C

    ohms law, little confusion, where am i going wrong?

    when testing a lighting circuit say we get a reading (r1,r2) of 1.10 the by using ohms law we work out the ampage, we get 230 divide by 1.10 when gives 209.09 amps. but it is protecte by a 6 amp mcb, where am i going wrong
  4. E

    Confusion over consumer units

    Hi folks. My house has Econ.7 therefore I have 2 consumer units. Is it possible to incorporate the heating board into the main board. I don't do any domestic stuff. I've seen dual boards and split boards but I'm cofused as to what the difference is. For example can I buy a dual board and...
  5. S

    NICEIC Certification Scheme Confusion with registration with council, NICEIC and Part P

    Hi All Been working away in Europe for 5 years and now returned to UK. I have got 16th edition and Test and Inspection and will be taking update course for 17th edition shortly. What do I have to do to be registerred to sign off and certificate own and others work. I assume need to enrol with...
  6. S

    PSSC & CPC size confusion

    The PSSC of a final ring circuit is 2KA so what is the min CPC size? For PVC singles k = 115 CB 32A (BS EN 60898) will disconnect in 0.1 second Fault current of low impediance = 2000A S = square root of PSSC x PSSC x disconnection time (t) / Cable constant (K) CPC size = 5.50mm (6mm cable)...
  7. R

    Confusion on lighting circuit in new build flat

    Hi guys, I popped in late yesterday to change two 3 pin bayonet energy save fittings to a couple of fancy fittings for a mate in his 'L' shaped hallway. Both lights are individually switched at either end of the hallway. I don't do much domestic sparking as am a facotry spark so never really...
  8. P

    ZS,ZE confusion

    I have a TNCS system in my ten year old house. I have a distribution circuit running to my detached garage 4 metres away via SWA. The PME is not exported to the garage but it has a separate TT system. My question is: How is ZS measured at the DB in the garage and how can I check the earth...
  9. M

    r1 + r2 continuity confusion anyone any ideas?

    alrite fellas, wondering if someone can enlighten me. domestic property very small 2 bedroom house had rat infestation now rats have been evitcted lol all results have been tested twice and then tested again with another instrument all calibrated etc cables have been knawed etc, inspection...
  10. O

    Latest post confusion.

    Why is it that when you click on 'new posts' the list that comes up is different to 'quick links' 'todays posts'. I would have thought they are the same thing.
  11. S

    350 KVA HV Transformer? 3 phase calculation confusion

    I need to buy a 3 phase HV transformer for an apartment block 1382 Amps is the total predicted single phase load after diversity. 1 Phase KW 1382 Amps 230 Volts ( I/V) 317.86 KW KW 1 Phase KW to KVA 317.86 KW 0.9 Power factor ( KW x P.F. = KVA) 353 KVA KVA Single Phase to 3...
  12. A

    Confusion over the 1% volt drop on AC side

    Could someone please advise, is this to be calculated from the inverter to the main C/U, or could this be to a sub board?
  13. W

    return path confusion

    Im looking for an overview on 3 phase power transmission and would be grateful if someone could answer this; Does the current originating from an ac generator at the power station eventually return to the generator star point . Im confused because Ive read that the return path for current is to...
  14. H

    Confusion over supplementary bonding

    hello guys, I'd just like you opinion as to whether I understand supplementary bonding. To my mind supplementary bonding is additional protection to ensure that the voltage between extraneous and conductive parts does not exceed the safe voltage limit of 50. Therefore if you check between...
  15. J

    Ballast confusion....

    Morning I have Ten ballasts to install and the customer picked these up for me , but I'm not sure about these . surely there should be 3 in (L,N,E) and 4 out (to the tube)?? there only appears to be four connections in total. Prob simple for yourselves Cheers
  16. G

    notifiable work confusion

    can anybody help me? i have been contracting to companys for the past three years and i am thinking of advertising and starting up myself. when i have done work for the companys they tested and notified building control, what i need advice on is if i do notifiable work what would i have to do...
  17. S

    partp confusion

    Say I have applied to go the napit scheme or similar. What would I do about notifiable work before my assessment ? Do I send in a building notice to labc or do the work and use it as my assessment.
  18. S

    hi guys, i have some confusion with 17th edition courses and my current qualification

    hi everyone. unsure if this is 100% right forum but basically i did a JTL apprenticeship from school. ive moved house and have just received my replacement certificate that was lost in the move. i seem to need this certificate to do the 17th edition????? anyway on my cert it says: "level 3...
  19. E

    Confusion over becoming an approved electrician.

    Hi guys to become an electrician I followed this route: 2330 Level 2 (2 years) 2330 Level 3 (1 Year) 2391/2 Inspection & Testing (5 day course) Working at Height and Haul Rescue Training (5 Day Course) PASMA Advanced 2356 NVQ Level 3 Electrical Installation (1 Year alongside 2330 L3) AM2 final...
  20. A

    Part P and confusion from course provider

    I have no previous electrical experience but wanted to complete a full house installation for my self build. I understand that I can do this but would need to get the LA to check and sign off the work. To try and help understand a little more I enquired to complete a Domestic Installer...

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