Search results | Page 8

Search results

  1. M

    Testing is normally a demonstration of safe isolation, loop impedance (PFC & PSCC) & RCD...

    Testing is normally a demonstration of safe isolation, loop impedance (PFC & PSCC) & RCD testing There is less focus on insulation testing and continuity as equipment and distribution units we use are pre-tested in the warehouse before arriving on site Hope that helps a little, enjoy the course
  2. M

    Hey, is that the James Eade course by any chance, He is very nice guy I don't have any past...

    Hey, is that the James Eade course by any chance, He is very nice guy I don't have any past papers, and I think the course has now changed a little from when I did it. But if you are already a Spark you will find it easy don't sweat
  3. M

    Debate with fellow domestic sparky

    Yeah even a small 5 module garage unit still counts as a consumer unit change, I dont know enough about part P etc just wondered if that was his logic Where is the line drawn as I guess a little 2 module enclosure wouldn't count as a CU? It is quite strange although, as others have said...
  4. M

    Debate with fellow domestic sparky

    Was the garage CU fed from a MCB/RCBO from the main house CU? I am wondering if his argument was that is was modification to an existing circuit?
  5. M

    Lost neutral on PME consequences

    Iv just seen this video so perhaps joint failure as i mentioned will be less of a concern in the future, although i exspect for now there there is plenty of old bad joints
  6. M

    House earthing from an off grid solar system

    The treads about "exporting" TN-C-S earths are not relevant in your case, these are about using a TN-C-S earth from the national electricity grid outside of an equipotential zone. As in your case you are completely off grid and not connected to the electricity supply network it doesn't concern...
  7. M

    Lost neutral on PME consequences

    Flipping heck Knowbody received a shock then?
  8. M

    Lost neutral on PME consequences

    Yeah i hear ya, likewise I have no experience with anything on the DNO side etc. I can see the joints to my house as its on the top of a pole at the end of my drive and I looks to be like i explained in my last post
  9. M

    Lost neutral on PME consequences

    I have always thought regulation 722.411.4.1 (iv) where protection from a PEN fault is by measuring the utilization voltage between L & N and then disconnecting all conductors if it is outside the range of 207v - 253v, as a bit of a cop-out and only really solving half the problem as it is...
  10. M

    House earthing from an off grid solar system

    I don't know for sure, but why must this be TT ?? Surely this is the same as how we set up generators to be TN-S for live events all the time? If you have 3 conductors going from the generator and solar already why not use one for the earth, this is a much better, more reliable and lower...
  11. M

    Lost neutral on PME consequences

    1 vote here for PROPER mantained TNS
  12. M

    PME, TN-S ??

    Yes I would very much like to know how often PEN faults occur, not sure how to obtain that information although I like your thinking of a good TT system with a very low impedance electrode South Africa apparently use an RCD BUT before the point where the CPC for the installation is joined to...
  13. M

    PME, TN-S ??

    Indeed with TT you get rid of the PEN fault risk, but you put alot of reliance on RCDs which also fail (perhaps more offen than PEN faults happen but who knows) Iv toyed with the idea of changing from PME to TT, as i live in a rural location with seperate overhead lines, so PEN fault risk...
  14. M

    Lost neutral on PME consequences

    The conversion of old TNS to TNCS in the street and the head staying the same inside the property I feel is a concern as a spark could install something (hot tub, heat pump, etc etc) outside believing the loss of PEN conductor risk is not an issue due to the fact it is TNS, him being unaware it...
  15. M

    Lost neutral on PME consequences

    Exsactly whey my outside lights are SELV or double insulated, they are in easy reach and one of them is likely to be touched
  16. M

    Lost neutral on PME consequences

    Quite! although rare, it seems strange too me so many people accept that risk !
  17. M

    Lost neutral on PME consequences

    I did think capacitance, but I dont know enough about how that kind of shock occures, so didn't want to sound silly ?
  18. M

    Lost neutral on PME consequences

    And the main switch / isolator is now probably in a bonded metal enclosure so you get a shock when opening the flap, doh I am keeping my plastic consumer unit as long as i can
  19. M

    Lost neutral on PME consequences

    Question 3 is an interesting one, as others have said all depends on where the fault is, perhaps we should have 3 pole isolators on TNCS supplies with L,N and PE being disconnected? Question 4: The Protective Multiple Earthing (PME) is what is in place on a TN-C-S supply to mitigate the...
  20. M

    Lost neutral on PME consequences

    I would say this type of cold floor is very common practice in kitchens and conservatories and the like, out of the 7 places iv lived only 2 of them have not had a cold probably more conductive floor in parts. Although the hope is the DPC will reduce this conductivity to the soil, if there...

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Back
Top