Search results

Search results

  1. Lucien Nunes

    Lucien Nunes Electrical Engineer Extraordinaire

    Hello all, my name is Steve, one of Lucien's oldest friends and executor, which is how I have his forum login. I just wanted to thank you all for the comments here. I've just printed them off to show Jenny, his mother, when I see her at the weekend. She will find them a great comfort, as she...
  2. Lucien Nunes

    Festoon lights outdoor

    Seems they are in series-parallel groups with the first seven in series, the last eight in series, and those two groups in parallel across the driver. When you cut off the last three, you broke the circuit of the second group and only the first group lit. When you completed the circuit by...
  3. Lucien Nunes

    Earthing question - TNC in Bulgaria - DIY

    OK. This terminal stud is really what defines the setup and it is a pretty standard feature of Soviet-era installations. If one of the two incoming single-core cables is connected to it, that cable (the supply neutral) is deliberately being used to earth the fuse box chassis and therefore...
  4. Lucien Nunes

    Homeline 50 Amp 2-Pole GFCI Circuit Breaker Tripping with tiny load

    Is the neutral of the cable to the shed definitely running through the GFCI in the 100A sub-panel? If only the phases go through (without the neutral) it will incorrectly sense any 120V load as a ground fault. Since fitting the separate neutral and ground bars in the shed panel, have you...
  5. Lucien Nunes

    Stumped my electrician

    What was that 'electrician' thinking? One side of the panel fed by one hot leg / phase is OK. One side of the panel fed by the other hot leg / phase is intermittent. No breakers trip. With 99.9% certainly the problem is upstream of the panel busbar and is a bad connection in the phase that is...
  6. Lucien Nunes

    How to calculate an MCB size

    The Multiplus is a combined inverter / charger including a transfer switch that I believe can handle 16A regardless of the rating of the inverter itself. The input current will be the total socket load (less whatever is plugged into the raw mains direct socket) plus the charger load of an amp or...
  7. Lucien Nunes

    12v Caravan circuitry

    It sounds like the resistance of the fridge circuit itself is too high. When the supply is taken direct from the Anderson connector, the voltage drops from 12.6 to 12.1 i.e. 0.5V drop at full load. When connected via the fridge circuit it drops from 12.6 to below 10.5V i.e. more than 2.1V drop...
  8. Lucien Nunes

    Ring main questions.

    1. Old colours are fine to keep in service 2. Wagos are just one brand of product that can do much the same job as any other wiring terminal. They are usually a good choice for most situations, but they don't have magical powers. 3. All wiring junctions need to be suitably enclosed with the...
  9. Lucien Nunes

    Strange pool pump breaker tripping

    As it is a 240V pump, if the Intermatic timer contacts are only disconnecting one hot leg of the power feed, the motor windings can remain live via the other leg when switched off and therefore can still trip the GFCI if there is a problem. The ground leakage from the windings could be...
  10. Lucien Nunes

    Jointing cable in wall to be filled and wiring zones

    It's not just pulling apart. When cables are terminated within an enclosure e.g. the back box of an accessory, there should be some slack that allows for a bit of differential movement due to thermal cycling of the terminal and conductor. If the cable is rigidly plastered in directly up to the...
  11. Lucien Nunes

    Jointing cable in wall to be filled and wiring zones

    Buried in the wall, no. Requires a complete assembly complying with BS5733 MF which will incorporate strain relief etc. Note that most insulated crimps are not suitable for solid conductors.
  12. Lucien Nunes

    Is this a class 1 or class 2?

    Being pragmatic, what is the real risk here? Who is going to get shocked and how? The problem with condemning things on minor technicalities like missing labels, especially ones that have been in use for years, is that they weaken customers' confidence in testers' soundness of judgement and get...
  13. Lucien Nunes

    Why did test lamps show 0V between live side and dead side?

    This was revealing the difference in sensitivity and input resistance between the multimeter and the test lamp. When connected between live and dead side of tbe fuse, the test device is in series with the load forming a voltage divider. The fraction of the total 230V supply that the test device...
  14. Lucien Nunes

    Is this a class 1 or class 2?

    The requirement for the Class II symbol pre-dates CE-marking and the symbol really ought to be there. I think post No.7 sums it up.
  15. Lucien Nunes

    Earth leakage problem with Karcher pressure washer

    Those winding resistances are not unrealistic. The running current is not determined not by V/R but by the impedance which depends on a lot of factors but is much higher than the DC resistance. In a capacitor-start or capacitor-run motor the two windings are connected together at one end. If the...
  16. Lucien Nunes

    Not electrical - suggestion for material

    The phenolic coated plywoods are expensive but durable. However one factor they all seem to have in common is that despite the embossed texture that some of them offer, they are very slippery. Extra strapping is often needed to prevent loads shifting and shuffling.
  17. Lucien Nunes

    Ceiling Fan Capacitor

    Yes, the light would still work. There could be other problems with the fan motor too though.
  18. Lucien Nunes

    Rewiring generator to match country requirements

    First, re. getting the ATS to correctly detect the incoming grid power, there are a couple of programmable functions on that controller. It might need nothing more than the threshold voltage turned down a bit. According to the bumf here: https://mtspowerproducts.com/admin/data_sheet/TCS3P125.pdf...
  19. Lucien Nunes

    Could a failed HW valve cause boiler to keep running?

    Yes. The feed to the contact in the valve is permanently live, so it if jams open it will command the boiler on 24/7 independently of any other control settings.
  20. Lucien Nunes

    Ceiling Fan Capacitor

    Yes, they can fail open-circuit.

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