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  1. marconi

    UK Gift ideas for my boyfriend

    Colleagues - DO NOT GO THERE PLEASE - I suggest a set of good quality, effective wire strippers. ▷ wire stripper review & comparison 2022 | FinalCheck -...
  2. marconi

    3 phase motor running backwards wire colours

    The cable in use clearly as you said has a blue conductor which is being used as a the L3 phase conductor - normally identified by gray colour. I take at face value you have tidied up the exposed copper connections. It would be best if you could mark up the blue conductor to identify it as...
  3. marconi

    3 phase motor running backwards wire colours

    You've done what I often do - forget to attach the images. Welcome to my club. Current membership now stands at 2.
  4. marconi

    3 phase motor running backwards wire colours

    The positive phase sequence is L1 Brown, L2 Black and L3 Gray. Is the blue colour you mentioned actually gray? See: https://www.tlc-direct.co.uk/Technical/DataSheets/Cable/CableColoursLeaflet.pdf post a picture of the plug Connections. The thickest pin is for the earth not neutral so you...
  5. marconi

    EV charger issue - Garo PME trips

    ElectricallyRandom: Where are we going? If we find that the RCBO holds with a charging current of 26A then there is some evidence that a factor in the problem is the magnitude of the current and its heating effect. I suspect - don't know for certain - but either the RCBO is faulty as others'...
  6. marconi

    EV charger issue - Garo PME trips

    For your interest, the heating effect of a 26A current is 66% of the heating effect of a 32A current since the heating effect of a current is proportional to the square of the current. So {26/32}exp2 = 0.66 x 100 = 66% The RCBO contains an electro-thermal-mechanical trip which uses the...
  7. marconi

    EV charger issue - Garo PME trips

    We will move on to this aspect after trying a lower maximum charging current.
  8. marconi

    EV charger issue - Garo PME trips

    Did you lower maximum charge current?
  9. marconi

    EV charger issue - Garo PME trips

    ElectricallyRandom - good morning Sir. Just wondering if you have resolved the problem and how? We like to learn from what advice was useful or otherwise.
  10. marconi

    UK DC/DC Voltage Conversion

    Please post details of the controller, voltage converter and steering motor.
  11. marconi

    What earthing system have we got here?

    Good evening. Well done for beating Australia in the Rugby. To help you we need some more pictures and information on the overhead supply (ie old 4 wire or ABC), intake details, is supply PME?, earthing conductors, equipotential bonding in place and earth electrodes if they exist. Plus, what...
  12. marconi

    Do "holes" stay put while electrons move?

    One needs to qualify which ‘speed of electricity’ is being discussed. There is more than one. See: What is the speed of electricity? - https://www.wtamu.edu/~cbaird/sq/mobile/2014/02/19/what-is-the-speed-of-electricity/
  13. marconi

    Do "holes" stay put while electrons move?

    Energy band theory: conduction of electrons and holes - The Student Room - https://www.thestudentroom.co.uk/showthread.php?t=6802608
  14. marconi

    EV charger issue - Garo PME trips

    ElectricallyRandom: Questions, questions, questions! 1. Is you leccy supply from overhead cables? 2. Where are you along the line of poles between the transformer and your tap off? 3. In the voltage plot was it your EV starting to charge that caused the very significant voltage drops at...
  15. marconi

    EV charger issue - Garo PME trips

    ElectricallyRandom: Do you have an electric shower? What power is it? Is it fed by right hand rcd?
  16. marconi

    EV charger issue - Garo PME trips

    https://www.digikey.be/htmldatasheets/production/2996418/0/0/1/dua55-datasheet.html ElectricallyRandom - Please would you look at the section 'Range Settings' in the link above and tell me what voltage window and measuring range have been selected by the four little switches on the voltage...
  17. marconi

    RCD trips with all load breakers open

    If the neutral and earth conductors have a potential difference between them where they enter your property, and this pd could depend on network neutral current then even in absence of line current through the rcd there may well be a neutral current flowing ‘forwards’ through the rcd and then...
  18. marconi

    RCD trips with all load breakers open

    The circuit breakers for your final circuits are all single pole which means when they are open only the line (brown) is disconnected from the rcd, the neutral (blue) remains connected. I suspect a neutral to earth fault but before jumping the gun you should call in a good electricians with the...
  19. marconi

    EV charger issue - Garo PME trips

    Not far from Dartford Crossing.
  20. marconi

    EV charger issue - Garo PME trips

    Thank you for the information. A quick analysis. If charger input terminal voltage is 222 V as you measured and output is 32A delivering 7.6kW from the table of page 6 of manual and assumed power factor is 0.9 (the tesla Gen 3 includes some power factor correction technology) then apparent...

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