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frequency

  1. D

    what frequency do 'HFAC' low voltage transformers (like varilight) typically output?

    Hi, I'm replacing low voltage halogen with MR11 and MR16 LED bulbs. AC supply would be simplest because of existing wiring, but I'm concerned about LED flicker: Characterizing and Minimizing LED Flicker - Lighting Solutions | DigiKey I'm looking at varilight transformers: VARILIGHT...
    • danieru
    • Thread
    • flicker frequency low voltage output transformers varilight voltage volts
    • Replies: 4
    • Forum: UK Electrical Forum
  2. P

    IET Code of Practice

    A chance to find out about the implications of the IET Code at FREE 4th Edition Code of Practice Seminars from Seaward
  3. D Skelton

    Eight 6ft 2x70W high frequency surface modular fittings for sale

    As title, very good condition, only 5 months old and are as near as makes no difference brand new. All come with louvres but no tubes. The fittings are of very high quality from Key Lighting (Model: Profile T8) and are sold new for £75.00 + VAT each. I'd be happy to take £20 each or £120ono for...
  4. J

    3 Phase Motors Speed Control

    Hi, Does anybody know of any alternative to governing the speed of a 3 phase motor than a frequency inverter? Thanks in advance, Jamie
    • Jamie3032
    • Thread
    • 3 phase control frequency motor motors other phase speed
    • Replies: 32
    • Forum: UK Electrical Forum
  5. C

    Frequency output of wind turbines

    Ok, if electricity in a wind turbine is generated by the wind spinning a coil in a magnet, how does it match the frequency of mains electricity (i.e.50 Hz) when the wind blows faster and slower all the time? Remember, there are no stupid questions, only stupid answers... :) (at least that's...
  6. M

    EICR question, TT.

    Hi guys I'm doing my first PI and it happens to be on a TT system. I've a question regarding the "Detail of Installation Electrode" box... 1, Type... Is that a simple as it sound? Rod, mat etc? 2, Resistance to earth... Is this another space for the Ze measurement or the resistance of the...
  7. S

    dno

    what is allowed to be tested or can not be tested on the dno side of a domestic property?
    • spowell108
    • Thread
    • allowed capacity dno frequency voltage
    • Replies: 6
    • Forum: UK Electrical Forum
  8. D

    Frequency of inspection

    I'm about to replace the consumer unit in an existing domestic installation. Can anyone point me to the correct rules in the 17th edition which advise on how regularly the installation should be inspected. I have to write it into the Installation Certificate and can't find the answer in either...
  9. A

    frequency

    Not sure of the frequency of formal visual and combined inspection of kettle, vacuum,washing machine etc in rented out flat, i dont think "used by the public" applies. would change of tennancy be enough?
  10. U

    Gear for sale!!

    I have gear for sale: 7x 8w emergency bulkheads £10 each 3 x 28w high frequency circular emergency (ansell) £25 each 4 x 8w box emergency,3 brass 1 white £10 each 3x 32a rcbos 30ma (Schneider) £8 each Radio frequency house kits x3 bases x2 smokes x1 heat (aico) £100 Or...
  11. marksparky

    problems with cat2 louverd high frequency fittings

    hi folks got a call from a customer saying that she needed 6 4ft flourescents tubes so wen i called to change them 2 out of the 4 in the fitting were flickering, changed them anyway needless to say it didnt cure it, which leads to me to believe the electronic ballast is faulty. Has anyone had...
  12. W

    Frequency of Periodic Testing

    Hi Does anywhere know why I can find a table (pref. PDF) showing the frequency of testing for particular installation types? Thanks in advance!
    • Wiki-Electrical
    • Thread
    • aus frequency inspection installation periodic table testing
    • Replies: 5
    • Forum: Australia
  13. telectrix

    frequency of PAT

    as title. i don't do a lot of PAT, got 2377 years ago and have recently come across a few sites ( offices ) where previous testers have stipulated next test due in 12 months on everything. now, iv'e lost my notes, but seem to remember that frequently moved items ( kettles, vacs., etc.),are...
    • telectrix
    • Thread
    • aus frequency pat pat testing
    • Replies: 17
    • Forum: Australia
  14. tank

    PIR frequency

    I was looking at my own CCU in my rented flat and there's a NICEIC sticker on it recommending that the next PIR should be done in 12 months time, not in 5 years, presumably the sparks judgement call based on the condition of my flat. does anyone know how much weight this 12 month...
  15. D

    2D and pir

    do the 2d high frequency work well with pir? I know the old magnetic ballast type didn't is the lamp affected badly by the switching and short on time? thanks
    • davelerave
    • Thread
    • aus ballast drivers frequency pir switching times
    • Replies: 9
    • Forum: Australia
  16. S

    Petrol generator frequency

    I'm considering buying a used petrol generator but there seems to be some confusion as to what the output frequency is, 50 or 60 Hz. Is there any way of finding out the output frequency of a generator? If it did turn out to be 60 Hz, could it be changed to 50 Hz, and if so, what needs to be...
    • starcott
    • Thread
    • aus engine frequency generator lower petrol rating speed
    • Replies: 10
    • Forum: Australia
  17. K

    Date of next inspection?

    Alright everyone can someone please tell me the recommended date of the next inspection on a new domestic cu install is it 5 years? Ive looked in regs and onsite guide and cant seem to find it thanks
  18. B

    Frequency of testing

    Hi Guys Having a senior moment, I can't find the tabulated guidlines for the frequency of testing. I know it exists somewhere....! Thanks in advance Billy ps Anyone know if I need to submit a diagram of locations of smoke alarms with the paperwork for a HMO going to the Council?
  19. edexlab

    DNO over frequency requirements

    We've received a note from WPD with an application which has been approved in South Wales which is out of our usual area although same DNO different office: ''As a temporary measure(until 2nd March 2012) G83/1-1 may be applied to inverter connected generators rated between 16A per phase and...
  20. O

    PIR - retest frequency??

    Went to see a job today, the houses are let to students and the owner believes he can do a PIR every 5 years. Given that the "average" student stays about 6 months and there are 4 students per house I said that a retest should be considered yearly. A quick look around told me everything about...
    • Octopus
    • Thread
    • aus condition every frequency guidance pir years
    • Replies: 17
    • Forum: Australia

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