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  1. marconi

    Why does my main house consumer unit trip when the inverter switched to AC backup?

    Please see attached electrical art. Please study and note my remarks beside the three balloons. The ohmmeter tests at A, B,C and D must be done with all sources of electrical energy ie mains, battery and pv panels isolated. With ohmmeter set to low range eg 0 to 200 measure between N and E/cpc...
  2. AA448645-A162-439A-858D-5223E60CA693.jpeg

    AA448645-A162-439A-858D-5223E60CA693.jpeg

    • marconi
    • Media item
    • Comments: 0
    • Category: Professional Electrician
  3. marconi

    Why does my main house consumer unit trip when the inverter switched to AC backup?

    The switching inside the inverter box is normally done by solid state switches to ensure no-break of supply when moving between mains to output or inverter to output. Tonyboy - where have you happened upon the term TN-S? I suspect what you have bought or set up is an off grid systemwith genie...
  4. marconi

    Why does my main house consumer unit trip when the inverter switched to AC backup?

    Is this the boxed system you have or something similar?
  5. marconi

    Why does my main house consumer unit trip when the inverter switched to AC backup?

    Have you an Ohmmeter/multimeter? Do know how to use it to measure resistance?
  6. marconi

    Why does my main house consumer unit trip when the inverter switched to AC backup?

    Please could you clarify the bit in bold in: . The AC loads are connected a fully protected AC output plug , there is one 30mA 40A, RCD and MCB with TN-S earthing arrangement (common Neutral to Ground). On the inverter load side including what you may have connected to it have you connected...
  7. marconi

    Random downlight flickering

    It would be interesting to know what happens when: a. All the LED final circuits are supplied by the new BG RCBO; b. you swap back the current BG LED final circuit to the original mcb and connect up one of the other LED finals to the BG RCBO; c. you supply all the LED finals via a new Click...
  8. marconi

    PUB GARDEN ELECTROCUTION TRIAL

    No. My wife did not like their crockery - let us not go there eh.
  9. marconi

    PUB GARDEN ELECTROCUTION TRIAL

    I went to a venue in Essex today to size up high tea for my wife's 60th with her friends. Sort of venue that specialises in weddings normally but does hotel, dinner and other events too eg today a post funeral tea. Posh sort of place. As we had our Jack Russell I wandered around the grounds...
  10. marconi

    PUB GARDEN ELECTROCUTION TRIAL

    Sentences as you state. The more culpable in law was the duty holder who was the landlord and owner. He failed to discharge his duties as required by shef law even though he knew what was required. The last link I sent says more.
  11. marconi

    PUB GARDEN ELECTROCUTION TRIAL

    Pub owner jailed over boy's electrocution death 28 May 2021 - Article from Forbes Solicitors - https://www.forbessolicitors.co.uk/news/47618/pub-owner-jailed-over-boys-electrocution-death
  12. marconi

    Random downlight flickering

    Anti-Flicker LED Adaptor Module - https://www.ledkia.com/uk/buy-accessories/4468-flash-save-anti-flicker-led-module.html?gclid=Cj0KCQiAic6eBhCoARIsANlox84KHdJbZD76O0-c7emY0nJBK3ZmOJHWyzuvx-7GU23aIxrw3NnQWucaAnO8EALw_wcB&gclsrc=aw.ds Glowfix Load Regulator | Varilight (YAGF) -...
  13. marconi

    Random downlight flickering

    Try putting the LED lighting mcb/rcbo right next to the mainswitch/rcd. If a dual RCD board put LED lighting mcb/rcbo on the side with lower loading. Voltage dips can cause LEDs and LEDs + DImmer to flicker.
  14. marconi

    Random downlight flickering

    I will have another think. Do your neighbours with LED lighting experience the same problem? You will need to ask at several homes to cover all three phases. And a temperature factor?
  15. marconi

    Random downlight flickering

    https://www.varilight.co.uk/leaflets/VARILIGHT V-Pro Dimmer Instructions JP003.pdf Take a look at the reference and the section called 'Overview' at the link above. It explains how to change between one of three modes of sine wave switching. The default setting is Mode 1 - trailing edge but...
  16. marconi

    Logic Outputs Problem in 7493 IC

    pc1966 - the sort of reading material I was weaned on. I have to say, that like many engineers, I was glad when 'electronic functionality' did not have to be designed and built from scratch each time, and instead one could take ics with reliable and repeatable functionality and combine them...
  17. marconi

    Logic Outputs Problem in 7493 IC

    Stripboard - Wikipedia - https://en.wikipedia.org/wiki/Stripboard what about using stripboard/veroboard or making up your own version of it?
  18. marconi

    Logic Outputs Problem in 7493 IC

    A coder/decoder or multiplexer/demultiplexer can do BCD to 10 lines one hot or vice versa provided that 4 bits are used for the binary input/output. Three bit words only covers the numbers 0 to 7 and therefore cannot cover the decimal numbering system which uses 0 to 9. I am glad you are...
  19. marconi

    Logic Outputs Problem in 7493 IC

    The 4028 can be cascaded. See Figures 13 and 15 in this link: https://www.ti.com/lit/ds/symlink/cd4028b.pdf?ts=1673700179941&ref_url=https%3A%2F%2Fwww.ti.com%2Fproduct%2FCD4028B The 4028 is a 3 bit binary to 8 line one-hot or 4 bit binary coded decimal ( 0 to 9 in 4 bit binary ie 0000 to...
  20. marconi

    Logic Outputs Problem in 7493 IC

    I will be back in touch but not today because I am cooking and have my in-laws this evening.

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