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roman

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  1. ackbarthestar

    Functional switching

    Good Morning all and sundry..... I'm putting together an advanced sample sheet for some apprentices a selection of methods to switch various loads. I've got 5 obvious methods of multiway light switching, Overrides for PIR, contactor switching both lights and motors, wireless switching (that's...
  2. D

    15 amp Three round pin double sockets.

    Hi....I have been asked by a local land owner, who lives in the local mansion!!!!!!!!!! If I could replace all the double sockets in the house....the main house....not the West wing where the kitchen is....lol The trouble is the old double round pin 15amp sockets have bigger face plates than...
  3. G

    High/Low Speed 3 Phase Fan Contror???

    Hi I've been asked to move 2 x 3 phase fan control boxes with high and low speed start buttons, stop buttons and LED indicator lamps. They control 2 roof fans. Inside one of the boxes the coil has gone on one of the contactors and needs replacing, but to be honest both boxes are quite old now...
  4. W

    Wylex RCBOS All Brand New

    1 x 40 amp - C type6 x 32 amp - B type1 x 16 amp - B type 4 x 6 amp - B type NHSXBS £120 the Lot including Postage
  5. J

    Tram Voltage

    What is the OHL supply voltage from a tram line?
  6. K

    Bending conduit…A bit different

    Not a job of mine but was asked about making a frame out of 25mm conduit. Not a single wire involved in this project. What ID radius can you bend 25mm 180° to using a standard Hilmore bender? Nothing to do with sledges or anything along those lines.
  7. B

    Industrial Oven

    I've got an industrial oven 100amps over three phases. I had an electrician wire it up (charged me £900! it took 5 hours and there were two of them!) and it works. The electrician then said as they were packing up, that it was surging. It pulled 97 amps when switched on, then when it gets up to...
  8. K

    Single & 3 Phase Wiring

    Hello I wondered if you could help? I’m only domestic installer and have been asked aboutthe following There is a 3 phase 200A metered supply into a factory unit.From the meter it goes straight into a pull handle isolator with fuses for eachphase (old Colours). All wiring from that point has...
  9. polo1

    DNOs - don't you just luv 'em????

    Me - "Hi, can you tell me what the earthing arrangement and fuse size is at this address?" DNO - "We don't hold that information" Me - "Err, it's your network. If you don't hold the information, then who does?" DNO - " Are you an electrician?" Me - "Yes" DNO - "Well you should be able to tell...
  10. F

    Cable size - 3 Phase supply - Single phase loads

    Hi All Got a 3 phase 20A per phase supply coming in, feeding 2 gites. The owner needs the 3 phase supply to also feed a new house 66 meters away. The house will only single phase loads and probably be unbalanced most of the time Now the tables I have, show that for a single phase - the wire...
  11. T

    Battery.. invertor for a fan.... need help..?

    Hi, I want to power a table fan (50 watts) using a battery. In India the input power to appliances (fan in this case) is 220 volts / 50 Hz. so can i power the fan with TWO 6 volts 4.5 AH sealed lead acid battery?? Can u please tell me how to do the power calculations? i want my fan to run for...
  12. J

    has anyone got a hour to spare to help a apprentice out with coursework

    hi, is anyone bored and can help before dinner ha can you help with a quick fire round of questions???? ive got questions to ask and just need simple answers. struggling with my nvq level 3 portfolio thanks joe barry
  13. K

    Motor testing

    One thing before testing a motor is check the mechanical loading. I’ve had many an argument with fitters who insist the gearbox or what ever is free. A classic being “Jock” (fitter) insisting the Radicon gearbox was free. I was doing pull ups on a set of 18” stillsons trying to turn the motor...
  14. M

    Doing a spot of work at home

    Im currently living at my sisters... And I knew it was a mess do slowly but surely I'm getting round to rewiring it. Took a light down and well well well...... where's that sneaky neutral off to....... Lol
  15. E

    Balancing 3 phase

    Having served my apprenticeship working for sparks who predominately worked only on single phase I as a result only tend to work on single phase installations as I lack experience in the 3 phase game. I have worked on and carried out some testing on 3 phase installations in the past but have...
  16. J

    3 phase motor current rating

    Hi can Someone please show me how I can work out the current rating of a 3phase motor from its kw rating? Singel phase is just kw/watts but I know 3phase is defferent. Cheers
  17. T

    single phase ac induction generator

    hi.. i have a single phase AC induction generator rated at 1500 rpm (star-delta excitation) coupled to a turbine. but unfortunately turbine is running at 1300 rpm. Will induction generator give any output (low voltage, current) or NO ??? pls reply thanks tarang
  18. K

    Voltage optimisation unit results.

    Hi folks, One year ago I was I asked to fit a voltage optimisation unit, the very popular one. Now it is the time to share some results. Customer's annual electricity consumption, before the unit was installed, was the following: 17 January 2007 to 7 February 2008: 8,375 kWh 7 February 2008...
  19. beatboaby924y

    Can you sign off your own work without being select/nic registered in Scotland?

    Hi guys, Wondering if some of you guys could help? Being a approved spark I have been asked to do a job (loft conversion) for a mate where the job will be tested and results sent to the council for I think building control. The drawing he has had done off of an architec with the new bedroom and...
  20. J

    Industrial Multicore control cables

    How do you test mulicore control cables to check the supply is isolated to disconnect the limit switch /sensor/junction box with klippon terminals with twenty - thirty cores in there to check non are live could be ac or dc?

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