voltage

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  1. M

    UK Hypervolt/EV Charger showing falling voltage ?

    Hi all Looking for some wisdom I installed a Hypervolt charger (the most recent model which is no longer available for direct purchase fr Hypervolt) It’s on a smart octopus setup Works perfectly fine on scheduled charge But when doing an Octopus ‘bump charge’ , Hypervolt says voltage falls...
  2. M

    Voltage monitoring .. Delay-Off time ?

    I see this model the on-delay is adjustable which is useful to prevent the supply bouncing Is the 5s fixed delay-off time sufficient to prevent equipment damage , in general ?
  3. W

    Voltage Drop Calculation vs OSG

    Hi All, Hoping to get opinions on Vd calculations for a 1.5mm2 downstairs lighting circuit with an estimated length of 128m! Length is due to loops at switches (neutrals required) and switched lives feeding various strings of lights. Parameters: Mv/A/m - 29 ib - 2.38 L - 128 Method 1...
  4. L

    UK Low voltage from live to earth, on a ring final.

    Why do I only get 50v from live and earth, I’m getting 240 from live to neutral. The circuit is a ring.
  5. S

    exceeding voltage drop

    hey guys we have done an EICR on a 2 bedroom bungalow, the supply is a 25mm 4 core 3 phase SWA to the property, it is supplied from 80amp fuse. although it is speculative as the cable is underground we reckon the distance is around 600m :fearscream:. it has being installed around 10 years and no...
  6. C

    How do I get rid of phantom voltage on LED lights feed.

    Have switched a light fitting from incandescent to LEDS. The LEDs continue to glow slightly after switching them off. The fitting is switched 240V live wires and there is a AC 5.1V induced phantom voltage. Little or no AC current. How do I get rid of the phantom voltage. A 4uF 400VAC cap across...
  7. J

    Line voltage wall thermostat wiring.

    Hi all I'm in the process of replacing some 1970s underfloor heating line voltage sauter wall thermostats with new mechanical replacements (of which there seem to be incredibly few in existence - sauter were very unhelpful with suggestions!). Anyway I have found a replacement (T4360B1015 for...
  8. T

    Safe isolation of rotary isolator when no incoming voltage present.

    Hi all, trying to work out the best way for proving safe isolation of a motor. Motor is fed from a contactor inside control panel, it then passes through a local isolator and then to the motor, the isolator has auxillary contacts so that when it is in the off position the contactor will not...
    • tomodo
    • Thread
    • incoming isolation isolator present rotary rotary isolator safe voltage when
    • Replies: 21
    • Forum: UK Electrical Forum
  9. S

    At what voltage should a 1.5V battery be replaced?

    Hello, I used two 1.5v batteries for the remote AC. (AAA/R03P/1.5V) and Its expiration time is 03.2025. The battery is weak, and the air conditioner cannot be turned on. I replaced it with two new batteries and the problem was solved. I measured the voltage of both batteries. They are 1.54...
  10. S

    How much surge in voltage should be in the surge protector? (Min and Max range)

    Hello, I live in the Middle East. I have between 220V to 230V. I bought surge protectors for AC and other appliances such as PC and TV. The upper limit voltage in surge protectors is 255V and the lower is 170V. How does the manufacturer calculate the normal voltage? (for my surge protector is...
  11. S

    Do the voltage drop and fluctuation occur?

    Hello, We have a mini split AC Inverter. We need electrical wire for the second mini split AC inverter. Can we get a wire branch from the first AC terminal? Do the voltage drop/sag and fluctuation occur?
  12. shanky887614

    For Sale Megger MIT30 30-kV High Voltage Resistance Insulation Tester 30kv. VAT Included

    Megger MIT30 30-kV High Voltage Resistance Insulation Tester 30kv. $1700 shipped PayPal F&F accepted only. In great condition, like new. Recently calibrated- valid till 23.05.2025 Comes exactly as pictured with standard leads, power cord and manual.
  13. R

    UK Inverter over grid voltage fault

    I have a Solis 3.6 KW inverter which works well until it exceeds about 2000W when it shows "over grid voltage" and shuts down. This does not happen if something is switched on in the house which draws a large amount of current such as the immersion heater. I have a voltage meter in the house...
  14. T

    Voltage testers - a basic question

    Hi. As part of safe isolation we use a voltage tester to prove dead; I've been taught that this is done by putting the probes in the following combinations: N+L, N+E, E+L. But why check anything apart from the Live? That's where the voltage is coming from right?
  15. M

    Voltage spike causing strange readings?

    Hi guys, Our client called us out to assess a fault in one of their buildings today, it turns out that certain circuits (those with fixed electronic equipment within them) are now acting as if there is no load and the neutral wires back at the board are now showing 230V to earth. Could a...
  16. ALH1976

    Random Voltage Drop from 236v to 120v

    BIG place OK lots of electrical bits. but one on a 3 phase Radial is tripping its RCCB so i check the wiring making sure its tight and it has continuity even trust the RCCB that it trips. All ok but i noticed on phase for a short while it dropped to 120v on my meter.. just Random comes and...
  17. G

    which voltage proving unit?

    i need to purchase a voltage proving unit - i have seen Megger MPU690, Martindale PD690, and Socket and See SP400, and Fluke but difficult to compare, will need sometimes to work on 3-phase so 440+volts needed. and with the automatic ramping, is there any way to stop the 400-690v for lower...
  18. razorbackdrain

    What's the best Voltage for a Drain Camera electric?

    Hi Forum, I had drain cameras plumbing equipment and tools, I was just wondering how much voltage the right drain cameras would have if we converted them to electric? Admin Note - cannot link out until posted ten times.. Many thanks.. Lou Any idea is much appreciated. Thanks
  19. A

    hi everyone , i have a question regarding extra low voltage lighting,

    the situation is this: 8 x 24v rgbw flood lights for a garden, each fitting has power consumption of 45w. 3 lights into a 200w driver, another 3 into a 200w driver and 2 x into a 150w driver. all in the same B10 RCBO. the breaker trips after a few hours. The 230v armour cable and connections...
    • Al Capone
    • Thread
    • everyone extra hi everyone lighting low voltage question regarding voltage
    • Replies: 4
    • Forum: Lighting Forum
  20. A

    Induced voltage.

    Hi Just replaced a bathroom extractor fan. I didn't alter any wiring. Both old & new have live & switched live. Trouble is, once activated, the fan won't turn off. Vent axia say there's an induced voltage. Not enough to switch fan but enough to keep it running. Sure enough, there seems to be...
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