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series

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  1. M

    2394/2395 Question

    Question is : - The insulation resistance of two circuits is of 40M? an 36? respectively. When tested together what is the total insulation resistance: answer is 19 ohms but how? can some one explain
  2. L

    Schneider ZBE 101 is not working

    Hi guys, I would to say hello to everyone and hope I will be comfortable in this forum!! I am a mechanical engineer and I am in a certain way "forced" to learn also electrical stuffs. At the moment I am trying to understand why my RESET button (ZBE 101) on my machine does not work. I...
  3. driverman

    series 7 type fuses

    Help! got problem on site. I'm after several series 7 type fuses to satisfy BNO meter suppliers. The BG meter people want a series 7 fuse in front of each meter. Where can they be sourced from? Thanks tried some wholesaler..no joy so far
  4. A

    series and parallel combinations

    Hi all I am carrying out my assignment and a little stuck on this i have to work out the Total inductance and total capacitance now I'm aware of the formulas for series and parallel inductors and capacitors but as you can see from the picture i have a series/parallel combination and I'm...
  5. T

    Masterplug RCD Adaptor

    I am using a Masterplug RCD adaptor in my shed, but when there is an electrical fault on equipment I am using in my shed connected to the Masterplug RCD it trips the main consumer unit RCD in my house. Any help please
  6. A

    WTD: JSB Bi-wire fire panel. FX22xx series.

    A local Landlady has a problem with ther fire panel, and needs a new one. As she only has 6 months left on the Lease, and she isnt making any money, she'd like it cheap as possible. The current one is a JSB FX2202 2 zone, bi-wire (iirc, my notes are in the van). It still works, but the...
  7. T

    Electrical problem BMW 3 Series

    Hi Guys, I have a BMW 3 Series (E46) 2001 convertible. I have been having a few problems with the Electrics and just wanted to see if I could get any advice on here before having to fork out on an Auto Electrician to take a look at it. Both the rear warning lights are on (I have checked all...
  8. C

    Relay advice please

    Hi, have this relay which needs replacing but cannot seem to find the right one any where in the uk i think i may have found one at maplins but it has 8 pins on the bottom infact all the ones i do come across have 8 pins as you can see mine only has 6. does anyone know of an alternative...
  9. HappyHippyDad

    Leds and capacitance...

    There are always quite a few threads where the problem is the LED staying on slightly even when switched off and I see that the solution is to fit certain resistors as a snubber. I have never had this problem. I guess I have either been lucky or have found a combination of switches/lamps that...
  10. Midwest

    Megger 1700 series test leads

    Has any of you Megger 1700 series owners, sourced some better test leads for their meter. I'm talking about have to swap ends of the Megger leads when you use something like a Kewtech wander lead or socket tester. I've notice recently, I've had to fiddled with the lead into the tester to get a...
  11. P

    rcds

    can 2 rcds on the same circuit cause problems
  12. N

    PV panels limiting to 15A

    Hi guys, i am not sure if i am posting in the right theme, however, can anyone explain why the pv modules can withstand 15A backfeed current? (for example). What determines these 15 A, what part of the pv module blocks the current to 15 amps?
  13. Resu

    Name Your TV Series

    On a similar note to Hawkmoon's thread, what's your favourite TV series'? I like: Breaking Bad (who doesn't!) The Big Bang Theory Family Guy South Park Bones Gavin & Stacey Going to start on the Walking Dead soon.
  14. A

    24 LEDs via PC PSU

    Hello everyone, I'm new to these forums and opened the account to ask for help (please, please, please) with my planned circuit... Power Source: Basically, I want to power an LED circuit from my PC's PSU Molar (12v red wire). The internet shows the red wire to be 12+ and the yellow 5+ - does...
  15. S

    burglar alarm advice..

    im asking to do some work on the orthopedic clinic but im not so familiar with burglary alarm..burglary alarm its ready in use and client asking to have another extra sensor to cover some place..to run the cable from the place where hi like that sensor to burglary alarm panel its quit difficult...
  16. gnuuser

    old bbc series The Prisoner

    I like the old shows but i think my all time favorite was The Prisoner (1967 to 1968) Patric McGoohan My parents thought it made no sense at all. but as I was always one to enjoy a good mind game I recognized that the theme of the show was a big mind game. if they could break his will and...
  17. L

    Need some help, knowledgable people needed

    Hi All Im in training to become an electrician, but this is seriously confusing me (and my qualified friend for that matter) i live in uk (230v supply) but want to buy two lights from America (120v) after searching on google and asking my mate for help, I'm still none the wiser. So far I've...
  18. J

    LED Lights in SERIES

    Hi, On a job today the client had some LED lights that aren't working. LED transformer is OK and 12v is at the lights. The lights are wired in series (as it says they should be on the fitting themself) and are wired in the following way - Twin and earth from transformer - Brown to Light 1...
  19. P

    How do I charge 2 12V leisure batteries connected in series from my starter battery?

    Hello electrical sparkly people! Can anyone tell me I can charge two 12V leisure batteries from my starter battery? The leisure batteries are connected in series to charge a 24V 3000W (6000W peak) inverter. To confuse things, I also have two 12V batteries which came with my Ford Transit Jumbo...
  20. L

    Temperature exponent for series resistance in solar cell model in MATLAB/SIMULINK

    Dear friends, I want to use the solar cell element in SIMULINK but there is a problem. I cannot put my temperature coeeficient for voltage which affects the series resistance in solar cell. In the link below, the parameters of the solar cell which have been used in SIMULINK element are...

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