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  1. B

    Megger 1700 tester opening

    Hi i have a Megger 1730 and need to open it up to replace an internal fuse. Does anyone know how to open the 1700 series testers? Thanks
  2. Y

    Problems with Series/ Parallel strings not adding ampage.

    Hi Guys, im hoping someone can help me. I have recently installed 3.2kw system for an offgrid job. The problem im getting is that im only ever seeing around 300 watts solar generation for the whole system. We have used 10 x Canadian Solar 320 watt panels Voc for the panel is 44.9 and the ISC IS...
  3. L

    Megger LTW300 Series Earth Loop Testers User Guide V05 1108 (Nov. 2008)

    Official Megger User Guide for the LTW300 series of 2-wire Earth Loop Testers. Models LTW315, LTW325, LTW325, LTW425 Version 05 (November 2008)
    • LectriCare Ian
    • Resource
    • earth megger series testers
    • Category: Megger Loop Testers
  4. gazdkw82

    Voltage drop - series resistors

    I have a question in a mock exam paper for the 202 exam. It asks "Four resistors in series have the voltage drops across them of 37V,55V,19V and 9V. Calculate the supply voltage. I'm struggling with how to approach this. I know how to work out VD but that requires more information (current)...
  5. J

    HELP with fourier series

    hey there my names james park i live in chelsea and am studying a HND in electrical engineering , I was really hoping someone could possibly help me with something, basically Explain what are fourier series different components for the non-sinusoidal periodic waveform. and help Evaluating by...
  6. S

    Astro Terra 28 - any experiences on failed series LED lamp fittings

    Hi All I would be very grateful if anyone has experienced and failed Astro Terra 28 (or others) LEDs. I have recently wired parallel and series over the years but have stumbled recently on how 6x 1w leds failed using a 5.95-10w 350mA constant current led driver. I have tested the circuit which...
  7. gazdkw82

    Parallel resistors

    I'm getting conflicting information regarding parallel resistors. I originally thought the below was how to calculate total parallel resistance 1. Rt= 1/R1+1/R2+1/R3 2. 1/Rt However in my pre exam workbook it says to 1. Calculate Rt as 1. above 2. Find the lowest common denominator 3...
  8. N

    12v transformer open circuit.

    Hi, I've got a simple downlighter installation which comprises 2 halogen bulbs mounted inside the wooden surround of a decorative fire place. There is a simple one/off rocker switch (semi hidden) so that the lights can be turned on or off. So, I have a transformer which supplies the 12v to the...
  9. 123

    Centaurplus Hortsmann C11 & C17 Programmers Series 2 Manual

    123 submitted a new resource: Hortsmann C11 & C17 Programmers - Hortsmann C11 & C17 Programmers Read more about this resource...
  10. Dan

    Deus Ex: Mankind Divided Review

    Any game bearing the Deus Ex name sets a high bar for itself, and yet, Deus Ex: Mankind Divided clears it handily. The followup to Deus Ex: Human Revolution retains the strong gameplay blueprint of choice-driven stealth and RPG gameplay that defines the series, but its superlative map and...
  11. Dan

    Deus Ex: Mankind Divided Review

    Any game bearing the Deus Ex name sets a high bar for itself, and yet, Deus Ex: Mankind Divided clears it handily. The followup to Deus Ex: Human Revolution retains the strong gameplay blueprint of choice-driven stealth and RPG gameplay that defines the series, but its superlative map and...
  12. T

    Led lights wired in parallel, should be series. How to resolve?

    Hi Have little issue Some Led lights have been wired incorrectly, instead of series the connection, it's connected in parallel. The supplied transformer/driver is 350ma constant and connected in series the lights are pulling 3v each. There are 9 lights in total and are set and can not be...
  13. W

    EAL L3 diploma in electrical series

    Hi just wondering if anybody has done the above portfolio or can help me out with it. Examples etc, any help will be very much appreciated as seem to be struggling with the wording of it all. Thanks
  14. akwoody2

    Series E board

    Hello chaps, A little help please. I have an old GE/Sector series E board and I need a RCBO. Anyone know where I can get one? Thank
  15. mattg4321

    Fault finding series LED outside lighting (collingwood)

    Got a regular customer who has just bought a house with some series wired Collingwood LED lights wired in series in the garden. Sparks who has done it hasn't done a bad job to be fair, but clearly didn't think too hard about those behind him! All 9 lights are on 1 switch and 1 driver (constant...
  16. sythai

    Grid dimmer for Aurora M series LEDs?

    Hi All Just seeing if anyone can recommend from experience a grid dimmer (MK or Hager grid compatible) that works well with the following LED downlight: Aurora M10 range : AU-FRLD811 Aurora M7 range : AU-FRLD711 Cheers Sy
  17. Simonslimline

    Series parallel combination resistance.

    Just spotted this on my facebook feed :juggle2: and thought it may be a good exercise for people to have a go at. What is the total resistance (Rt) of the circuit? :book::)
  18. S

    3 pirs in series

    Hi guys advice needed i am on a job where there are going to be 3 pirs controlling around 12 lights the 3 pirs are just because of the layout of the room,these have to be wired through greggs this is a method I have never used before as have been doing heavy industry for past few years can...
  19. S

    Overload relay in series with contactor latching circuit- Why?

    Recently had to work on Chinese plastics dryer with an overload relay wired in series with contactor latching circuit auxiliary contacts. When the overload trips you can still turn on the motor while the button is pressed. Why is that? It should be tight before the A1 or A2 terminal I have seen...
  20. P

    Testing IEC Extensions

    Hi all and thank you for letting me join the forum !! I do a bit of Pat testing at my work and have been asked to test some of the leads that attach to the IEC leads with the plug on(I.e. to make them longer). As these haven't got their own plugs do they have to be tested as surely they are only...

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