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  1. D

    why the new fluorescent lamp feels lower brightness?

    Hi all. I just bought a box of T12 40w new fluorescent lamp that feels lower brightness than the existing one, why? I don't know how to measure the brightness, just feeling. thanks Diyer
  2. H

    Zs is lower than my R1+R2

    I’ve just changed a few lights for a customer and I rarely do testing so not very knowledgeable on it. I tested 3 lighting circuits. 1st circuit - Zs is 0.48 - r1+r2 is 0.55 2nd circuit - Zs is 0.75 - r1+r2 is 1.02 3rd circuit - Zs is 1.06 - r1+r2 is 1.55 All breakers are B type 10A BS en 60898...
  3. Kartune

    3S4P BMS Balance Charging Board lower charge current than expected?

    Items i'm using for this battery pack: 1x ~ HX-3S-FL25A-A BMS Balance Charging Board 9x ~ 18650 (3000mAh, 15A Continuous Discharge) 12.6v 2A AC/DC Adapter Renogy 24V 50Watt Solar Panel Li-on 12-24V 50A Solar Charge Controller ISDT 1S-8S Battery Monitor So when my battery is about 12V, i can see...
  4. J

    UK Zs readings unusually high on new installation, what is the best option to lower them?

    I've just finished an installation on a large outhouse around 50 meters from the main property, but I'm having issues with unusually high Zs readings within the new installation.. The nature of the installation is a TNCS system with 25mm tails & 16mm cpc Henley blocked from the main supply to a...
  5. V

    Wall socket relocation lower than it is

    Hello, I am planning to have a feature wall built in my living room. There will be two very large porcelain tile, with TV mounted and hole for cables pass through. My question is: can I have my wall socket relocated at 300-350mm from floor level in order to have less cuts in my tiles? Are there...
  6. C

    Lower your equipment costs

    Have been in the electrical supplying business for a while and have decided to take on another venture and leave this one behind :(. Currently we have over $200,000 in commercial lighting equipment that ranges from motion sensors, retrofit troffer kits, fluorescent and led lighting...
  7. T

    Does removing a socket lower breaker amperage?

    I tried removing a socket. I turned off the power, I snipped the wires off, covered with electrical tape, put those plastic twist nobs on the end each wire individually. Then tucked it all into the "socket hole. I have a plastic cover with no holes i'll be screwing over to cover the whole job...
  8. C

    Downlights - do I need to lower the ceiling?

    Hi guys, Is there a requirement to create a false ceiling for installing downlights in a bungalow kitchen ceiling? above there is the usual insulation stuff. I thought of just clearing the insulation around the lights and make a little box with plaster board to cover the lights just for extra...
  9. S

    Connecting pulse sensor to lower voltage DAQ

    Hello there! Simple question, I have energy meters like those: https://www.zelec.fr/details-compteur+d+energie+monophase+direct+45a-155.html this one is on a french website, but the operation is simple. This one in particular uses an optocoupler 27 Vdc for the pulses, but what is the voltage...
  10. Rockingit

    lower wattage kettles

    Just had the Aussie (my better half) go looking for a replacement kettle online and I'm curious to see that the vast majority are now only 2.2kW yet described as 'fast boil'. Have I missed something?!
  11. Michaelp

    A good way to lower the grid voltage for economy purposes

    I have seen few cases where the owner of a factory uses transformer after the grid to lower the voltage, from 240 to 220v as a way to lower the consumption and at the end to save money. I was wondering if an inverter will do much better the job instead of a simple transformer as you can keep or...
  12. S

    12500 new electricians required. Does this mean even lower wages

    Over 12,500 electricians needed for new technology skills demand - The Electrotechnical Skills Partnership - https://www.the-esp.org.uk/latest-news/over-12500-electricians-needed-for-new-technology-skills-demand/ This is what an industry training organisations TESP is saying, bit of course they...
  13. I

    Voltage lower than nominal

    Hi All, I've been called to fit & connect led strip lights in the living room. Full rewiring has been completed recently and two switched T&E cables were left in the ceiling cavity to wire led strip lights Client told me that electrician who did full rewiring in this house supposed to do led...
  14. R

    Lower the voltage of a three phase 220v delta wiring system with auto transformers

    Hi all, I have a three phase 220v delta wiring system but the real voltage is about 240-245V by measuring between the pairs RS, RT, TS. I want to lower it to about 220V so I was thinking to use three auto-transformers 240-220V wired like this: I expect to find 220V between the transformer...
  15. A

    12v car battery. How to lower amperage output for a device?

    How do I lower the amperage output best for a device that will suck my car battery dry without loosing too much energy? There are several methods but I would like to know a way to say get around 1 ampere max out to my device the most energy efficient way. Not loosing too much to heat. The...
  16. O

    18th Edition & OSG - higher or lower - a bit of fun!

    So we all have to start parting with our hard earned monies CEF have just emailed me an offer of £94.95 (they say no VAT) Which is the cheapest I've seen so far .......... Anybody seen a lower price (or higher) :):):):) EDIT: The bundle isn't for both IET books the OSG guide is the NICEIC...
  17. Gavin John Hyde

    Lower Ze reading than expected

    On a job today and when testing got a Ze of 0.03 ohms on a tncs. Using a Kewtech 64DL. Installation has main fuse in hallway outside the 2 bedflat then a switched fuse feeding a submain cable to the actual CU. I did Ze at both immediately before switched fuse and in CU with earth disconnected...
  18. S

    buzzing led problem , thinking of using lower watt bulbs

    i put in a ring of 12 leds in a room (too many in reality) put in a good dimmer meant to be able take load but lights causing horrible buzz i am currently using 5w bulbs if i replace the bulbs for 3w should that reduce the load and stop the buzzing, trying this before having to take lights...
  19. A

    Theoretically... cables must be fused down when a lower size cable is connected to a larger sized ca

    Now I completely understand why cables must be fused down when a lower size cable is connected to a larger sized cable. To ensure the cable does not burn out from current that it cannot take. Yes i know this Now current doesnt go anywhere it isnt in demand for so if a spur off of say a 6mm for...
  20. G

    Breaking capacity of 3871 fuse lower than pfc?

    i have just done a test on a property and the pfc at origin of installation was 0.712ka. The 3871 mobs have a 6000a breaking capacity. I am a bit confused as I have read something about it always being higher anyway (16ka) for a fuse or main switch 100a or less. Any info here would be much...

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