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  1. Alex-SL

    Cable Design Software

    Hello, If you were using a 4-wire cable, then I would advise the MeteorSpec software to choose and check cable cross-sections. The MeteorSpec has the motor calculator and the cable current-carrying capacity calculator. The freeware version supports only 3-phase symmetrical networks with 4- or...
  2. Alex-SL

    UK Cable-Mate Software

    Hi. This is really interesting software. But I use the MeteorSPEC more often. This is a CAD plugin for calculating 0.4 kV networks + various useful built-in calculators for electricians. The MeteorSPEC has always been free. MeteorSPEC is not a competitor to Cable-Mate but it is a good addition...
  3. Alex-SL

    Cable ratings - constant load?

    If we limit the maximum cable temperature to 70C degrees, then the current carrying capacity of the cable Cu 35 mm2 is 119 A only (with the C-installation method). To supply a load of 150A per phase, then you need to use a cable Cu 70mm2 (this will be with a small margin).
  4. Alex-SL

    Cable ratings - constant load?

    Hi, When choosing a cable, you should focus on the installation conditions. Derating factors can significantly change the base value of current carrying capacity. Are there any loaded neighboring cables or communications? In any case, initially the cable was selected at the limit, without...
  5. Alex-SL

    Electrical Layout diagrams

    Hello Chris, There is a free software toolkit for electrical designers – MeteorSpec. It’s a CAD-plugin. Supported CAD platforms are AutoCAD® BricsCAD® and GstarCAD. You can find MeteorSpec on MeteorSpec LT - CAD software for analysis and designing low-voltage distribution networks -...
  6. Alex-SL

    3 phase furnace

    I would advise you to use suitable calculators. You can find many free ones on the net. For example: Power factor = 1.0 Design current = 50A, Protection = fuse gG 63A, or MCB C63A Note that the furnace has a short starting current while the heating elements are still cold.
  7. 1567779374483.png

    1567779374483.png

    • Alex-SL
    • Media item
    • Comments: 0
    • Category: Professional Electrician
  8. Alex-SL

    Do you think can be Electrical Layout diagrams automated?

    Hi Gasper Unfortunately, total automation of designing electrical projects is not possible. Only some of the procedures can be automated, and it is better that very time-consuming procedures will be automated (for example: schemes drawing, computation of specifications, electotechnical...
  9. Alex-SL

    cable selection 600amp 3 phase

    If you use 3 parallel cables H07RNF 4x95 mm2, voltage drop in this cableline is 1% only. 3 x (H07RNF 4x95) is suitable for this case.
  10. MeteorSPEC_600A.png

    MeteorSPEC_600A.png

    • Alex-SL
    • Media item
    • Comments: 0
    • Category: Professional Electrician
  11. Alex-SL

    Metal lamppost in garden... TNC-S

    Hi weevilward, As I understand it, your main question was: “in the event of loss is supply neutral, everything connected to MET, including that lamppost, will rise to a voltage, anyone touches it may get a shock? ” You can find all answers in IEC 60364-4-41 standard. There is “Protection under...
  12. Alex-SL

    Is the IEC 60909 standard applicable for short circuit current calculations in UK?

    I am from Estonia, but probably I will design street lighting projects in the UK. But it's not important now. I'll ask my question more widely. If there is a national or regional standard for electrotechical calculations (for example, for SC currents) in a country, can I use calculation...
  13. Alex-SL

    Is the IEC 60909 standard applicable for short circuit current calculations in UK?

    Hi Wilko, Thank you for your answer, but I already have this brochure from Schneider Electric, and I have official doc of IEC60909 (edition 2016). I’ll reformulate my question in another way: is there a regional standard for short circuit current calculations (up to 1kV) in UK? If such...
  14. Alex-SL

    Is the IEC 60909 standard applicable for short circuit current calculations in UK?

    Hi. I would like to get a help from this forum electrical engineers. There is the international standard “IEC 60909” for calculations of symmetrical and asymmetrical short circuit currents. I need to calculate line-to-earth short circuit (circuit 0.4kV) by the software that uses calculation...

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