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volts

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  1. HappyHippyDad

    Odd request regarding phantom voltage!

    Afternoon all... I would like to experience phantom voltage!! Is there any way I can reproduce it so that I can test it? I know this might sound a little silly, and I realise my new Drummond test lamp would simply not light up if it is phantom voltage, but I would just like to see it for...
  2. S

    2volts on a disconnected cable?!?

    I've recently been sent to complete a re wire for another contractor and there is a cable which isn't connected to the consumer unit which shows 2volts on it! is there a reason for this? I'd it potentially dangerous? How can I correct it? It's on one leg off the ring main in the kitchen. Any...
  3. HappyHippyDad

    Voltage drop and it's effect?

    Hello all, just been thinking over Voltage drop!! 1. Where does the 3% and 5% figures for voltage drop (VD) come from? Appendix 4 (BS7671) gives the figures but why the different values between lights and sockets? 2. Also permitted voltage levels are -6% and +10% from 230V giving a min of 216V...
  4. S

    Voltage drop and current drawn

    Gentlemen I have a question for your perusal. A 3kW 230volt submersible pump is connected to a long extension cable (60 metres). Approximate current drawn is I=3000watts/230volts = 13amps (ignoring PF and efficiency). Cable is rated at 0.03 volts/amp/metre therefore the volt drop is 0.03x13x60...
  5. The Solar King

    IET Code of Practice for Grid-connected Solar Photovoltaic (PV) Systems

    This is now available for download and comment from here: Draft code of practice for public comment - The IET Martin Cotterell of Sundog who has been involved with this has written an informative blog at Solar Power Portal: Preparing for the upcoming IET solar PV code of practice | Solar...
  6. HappyHippyDad

    Analog voltage tester?

    Could anyone give me a link or tell me were to get an analog voltage tester? Just want to be prepared for phantom voltage! Cheers all :smile5:
  7. N

    Doorbells and Voltage drop

    Hi All First posting to the forum so I hope that I've posted in the correct place. I'm looking to install a doorbell at my home in France. The distance between the bell push and the location of the bell/chime is about 40 m. I originally wanted a battery operated unit but I've been warned that...
  8. S

    Voltage still detected after rcd had tripped? why could this be...

    Hi all, I have install a RCD fused spur on the end of line feed to a bathroom lighting circuit. Thus protecting the bathroom with rcd. I tested the rcd (manually via the push 'test' button) and it killed the lights and fan as expected. I used my volt stick to confirm that the cables were...
  9. M

    volt drop query

    Hi all, Am wiring in some lights in a carpark.. The total distance is 150m there are 4 lighting posts rated as follows A-200w B-300W C-300W D200W (with A closest to CU) All loads are LED They are spread at distances of CU - A = 30m A-B = 40m B-C = 40m C-D = 40m Having done my volt drop calcs...
  10. I

    Voltage Drop Branch of radial circuit

    hi guys Need some help in calculating voltage drop on a branched radial circuit. (13A design load 2.5mm cable)( cu to junction box 8m 2.5mm) for a standard loop in loop out radial it would be IbxDxmV/m/1000 this circuit has 2 branches from the junction box one/ 10m long ( 1 double...
  11. S

    Volt drop to summer house heating

    Hi. First time poster here so please go easy on me. A customer of mine has had a summer house built at the rear of her garden which has been supplied with two 6Kw heaters! Yep, 12Kw!! She would also like 2 switched double sockets and about 4 LED spots installed. Now the problem, as if a 12Kw...
  12. E

    Re: Extra Low volt switching for lighting

    Re: Extra Low volt switching for lighting What regulations are there for extra low voltage controlled 12 Volt lighting. Also are there regs for any type of low volt DC switching from 12 volt battery (solar charged) off-grid LED lighting ? The control unit is home brew with infra red handheld...
  13. I

    Line to Earth fault 70 volts?!?

    Just tested a lighting circuit to find that the voltage between Line and Neutral was 240V and Line to Earth was around 70 volts? What could this be? a short between Line and Earth? Also the circuit is on a 6A 30mA RCBO but doesn't trip, the test button works though... thanks
  14. E

    voltdrop calculation

    been to look at a job with a long main supply approx 60m long underground 25mm 3core SWA running off a 100amp fused isolator. meter position is at drive entrance and house is approx 60meters away. not done a voltdrop calc for ages so can someone correct me if i,m wrong. this is a new build...
  15. J

    "Voltage Drop" Please help!

    Hi folks Iknow this topic has been beaten to death on this forum but after reading some of the posts and speaking to some of my co workers I am still a littleconfused, I am aware there is several ways of calculating voltage drop but amstill unsure of when to use the correction factor of 1.2 and...
  16. O

    Mastervolt complaint

    Hi people Are we the only company to have a nightmare when dealing with Mastervolt technical regarding faulty inverters. They're shambolic and constantly trying to blame the installer. To be honest, I can live with a warranty argument with an inverter company, but as Mastervolt contacts the...
  17. P

    Volt drop question

    Hi everyone, I am intending on working in the uk shortly, i am from ireland and dont have the uk regs presently. I am trying to prepare for the exmas i will face and the cable calculations/volt drop calculations are something i cannot remember doing here in ireland in my college time so my...
  18. S

    Voltage between earth and switched line terminal on one way light switch

    After installing some LED fittings in a bathroom and disabling an electric shower circuit I carried out a check on the whole installation. All fine until I used my Di-LOG probe to probe the switch plate screws to check that I had not pinched any live wires in the light switch back boxes around...
  19. D

    Voltage drop on swa

    Hi I've been asked to provide a supply to a machine shop on a farm. The nearest supply is 170m away. I'm working out the vd/a/m and I'm looking at having to install a 25mm 2 core SWA to compenate. But that is while working out the current carrying capacity of the cable at 152amps (Ref. E) or...
  20. M

    PV and Voltage Optimisation

    Hi Guys I saw the other day a Voltage Optimisation Company stating that you can connect and feed an inverter via an optimised circuit, are there any views on how this would be allowed under G83-2

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