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  1. D

    New Transformer Humming Noise on Smart Doorbell 24 volt AC - How to fix this UK

    Hello All, Incase this reaches other non UK residents to confirm this doorbell has been fitted in England it regard to electricity distribution feeding the circuit This is the first I've posted and I'm certain many on here will have a good explanation and remedy for this problem. I've made...
  2. G

    Curr/Volt profile in circuits with Drop-in T8 LED Replacements vs normal T8 Fluorescent?

    Hi, I'm troubleshooting a 'smart switch' issue which is connected to an existing fluorescent 4' 2-bulb (T8) fixture where I have replaced the fluorescent tubes with LED drop-in LED T8 tubes (no re-wiring necessary, so ballast is still in the circuit). Vendor indicates that the switch may be...
  3. MWhale

    NFPA70E battery 100 VDC vs OSHA 50 volt standard

    I just finished the NFPA70E 2021 online training. As far as I understand it the NFPA 70E is OSHA compliant but, I feel like the guidance between them disagrees when it comes to the shock hazard of DC batteries. I work with EV type battery systems 28V to 800 V so, this is important. OSHA general...
  4. P

    12 volt timer delay wiring

    hi guys,i just need a little help wiring a timer delay relay. anyone?
  5. i4Automation

    Industrial USB 5 volt outlet

    Hello all, I'm surprised how hard it is to find a USB outlet for industrial panels. I've found several small compact converters (I think aimed at vehicles) that give out the correct voltage and low cost but not DIN rail mounted. I was looking for a 24 VDC power supply with a USB (or 3) ports on...
  6. H

    24 volt fridge compressor

    i have a friend with a 24 volt fridge. he has installed 3 different inverters and all 3 will not run the fridge they will run motors on different things though. he can take 2 12 volt batteries and get 24 volts d,c and this will run the fridge. anybody got any ideas on what is happening? it's not...
  7. W

    what is the voltage? 180 volt? 220 volt - Myanmar

    If I turn off the breaker and measure the voltage across the breaker (upper and lower screws), the voltage is around 180 volt. If I measure the breaker's upper screw and the grounding bar of the breaker box, the voltage is 220. What is the actual voltage and why is the discrepancy? Thanks.
  8. D

    Nice old volt meter

    https://www.ebay.co.uk/itm/Vintage-Taylor-Electrical-Instrument-Bakelite-Multimeter-Retro-Electrician-Tool/124664248805?hash=item1d069179e5%3Ag%3AiqgAAOSwWYBdZFBx&LH_ItemCondition=4
  9. B

    220 Volt light Fixture in well house

    My parents have a small well house covering a tank and well pump. The house and well house were built in the 1960s and the pump/control panel is fed by a single electrical cable with 2 hots and a ground. They live in middle GA so it does not get very cold but does occasionally dip below...
  10. J

    12 Volt lighting.

    Hi, I'm looking for some advice on the lighting in a bathroom. I recently had an EICR report carried out and it was pointed out that the bathroom lights were not to the correct standard. They should be IP65 rated and it has also been suggested that they should be fire resistant. The present...
  11. G

    12 volt 10 amp suggestions

    Hey peeps, i ordered something online that requires 12 volt 10 amp power, and i'm looking for some easy and cheap suggestions.
  12. C

    Practicality of 400 volt equipment

    Would it be practical, or technically possible to economically mass produce 400 volt single phase consumer goods? Light bulbs, kettles, heaters, chargers, TVs, hobs, vacuum cleaners, washers, dryers, microwaves, tools, ect ect? I'm thinking this would save a lot of copper and make wiring both...
  13. T

    -DIY- Powering a 3 volt LED from a 4.5V supply

    Hello, I'm wanting to power 1 x 3v led from a 4.5v power supply and 2 x 1.5v leds from another 4.5v supply. Can anyone advise what resistor I have to install on each one. Using an online calculator I'm getting 82 Ohm on a calculator. is that correct? Is there anything else I need to take into...
  14. C

    92 volt touch potential

    I'm really confused by this engineering article. How can the maximum touch voltage be 92 volts on a 230 volt system when in theory it ought to be 115 volts or higher? https://www.gt-engineering.it/en/en-iec-standards/iec-60364-4-41/tn-systems Huh?
  15. D

    UK Two 240 volt sockets overheated in kitchen

    Hi. Please let me know if you need more Information. In my kitchen one socket fused and will no longer work. The only thing plugged into it was a tasting coffee maker. The double wall socket had a kettle on the other plug. And that works fine. The switch on the tasting plug no longer switches...
  16. B

    Auto - 6 volt with a 12 volt battery

    Is it possible to have a 12volt battery, have it reduced to 6 volt to be compatible with a 6 volt system and still be able to maintain the 12volt battery by way of an inverter or something?
  17. B

    220 Volt single phase Contactor relay controlled by 2 switches

    Hi, I am looking for help wiring a 220 Volt single phase Contactor relay that has a single A1 Coil terminal to be used with 2 float switches to control a pump. I know how to connect a single switch to the relay but unsure how to add the second switch. Each switch can be Normally open or...
  18. N

    277 Volt lighting. Y system. I have a string of lights out in a hallway.

    277 volt Y system lighting circuit. A string of lights out in a hallway. Have 277 to ground on both my hot and my neutral. Have only 15 volts between my 277 hot and 277 neutral. This was discovered Friday afternoon, Co. does not pay OT so its my unwanted challenge for Monday. Will look at prints...
  19. W

    ECT 5 volt reference

    My ECT 5 volts reference is dropping to 2.3 volts when the sensors is plugged in. What could be causing the volt drop please? Also return voltage to the ECM is nothing at all Thanks Jeff
  20. P

    12 volt catenary lighting transformer?

    Anyone any idea where I can ideally get an identical or similar replacement transformer for this (used for 12 volt catenary lighting). Any suggestions appreciated

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