voltage

  1. S

    High Voltage advice (11KV)

    Hey all, looking for a bit of industrial electrical advice, I'm kind of stuck between a rock and a hard place at the moment, the company I work for are pressuring me to work on HV (11KV) against my will. They put me through a 4 day AP (approved person HV) course and as I was the only person who...
  2. D

    115vac line tests with proper voltage, powers a low watt bulb but will not run a drill.

    I have a 115vac line that tests with proper voltage and will power a low watt bulb but will not run a drill etc... Line from main panel to barn is 10-3 copper on a 30amp breaker. Sub panel has two 20amp breakers one for lights and one for plugs. Wire was run 30 years ago and ran a vacuum...
  3. Brqchi

    Can voltage transformer and frequency inverter replace frequency converter?

    Hi. I live in Kurdistan(iraq). I bought these four devices from the United States: @BLENDER: 120V, 50/60Hz, 12A @food dehydrator: 115V,50/60Hz,600W @food dehydrator: 110V, 60Hz, 1500W @Vacuum sealer: 120V, 60Hz, 1.06A As you know Iraq's power is 230V-50Hz, So I have to change the voltage...
  4. HappyHippyDad

    Which voltage tester?

    I will start by apologising to @westward10 as he will have had to take time out to move this thread to the correct section. I am terrible at putting my threads in the right section and westward always moves them to the correct location. This time I did actually look... and look... and look...
  5. Alireza1201

    Prevent an AC controlled SCR from turning off at zero voltage of AC wave.

    Hi guys, I have used the following image circuit to control the load. AS you see the SCRs are controlled by AC signal and The opto-triac is always ON. If the load is a resistor, When the AC signal is positive the current passes through the SCR1 and when it's negative it passes through the SCR2...
  6. Alireza1201

    Maximum output voltage of a relay

    Hi every one. I have a NC relay with the below features which is written on the relay: Input voltage:12V dc Output switching voltage: 220V ac Output switching current: 5 amp Can I use this relay for a 400V ac, 0.1 amp Output case? Can the relay stand up to this high voltage? Thanks
  7. B

    Electrician wanted American voltage Kent UK

    I have a 5th wheel caravan. It has had a transformer fitted for UK electrics. The air con, microwave and fridge freezer have stopped working because they run off the lower voltage US electric box. I need an electrician who understands the American electrical system. The caravan is in Kent. Any...
  8. M

    Different AC voltage in multicore cable

    I wanna control (reduce) the speed on my AC duct fan by inserting a variac between the mains and the duct fan. The duct fan is currently connected to the mains (230v) in a junction box close to where I wanna install the variac (3 meters). The variac has 4 connection-pins: L - mains N - mains...
  9. C

    UK Earth to Live Voltage - 206v

    I've been fault finding an issue in a domestic property, the situation is as follows... RCD spur that is protecting outside sockets, This spur is on the downstairs 32A ring, the sockets directly on the ring pass RCD tripping test. The cables coming into the spur won't trip when tested...
  10. HEXx99

    USA 208 Voltage too low for machine

    I ran 208 v power to a rottler em69p cnc machine. it calls for 208/240 v 3 phase. 60amp rottler em69 installation manual everything is wired using 3 #6 hot and #8 ground to 6/4 SO cord drop to the machine . inside the machine again the wiring is 3 #6 and #8. I checked voltages and got 208-209v...
  11. Z

    AC / DC voltage drops across Diode

    I am unable to find voltage drop of normal silicon diode(0.7v) on Voltmeters during Proteus Simulation. Also we consider 0.7v drop of diode equivalent to DC Source of 0.7v but DC voltmeter is not showing any output and AC Voltmeter shows around 5 volts drop across diode instead of 0.7V.Kindly...
  12. Z

    Zener Clipper Output Voltage is AC or DC?

    I designed basic clipper circuit using single 3.3v Zener.When i simulate this on proteus and while checking output by keeping knob on AC of respective chanel and output shown is 2v positive and 2v negative from refrence ground(obviously wrong).When i change knob to DC it shows correct output of...
  13. tank

    Frequency without voltage

    Could anyone shed some light on what might be going on here, before I cut a trap in the laminate to find out. I have a dead socket on the end of a 2.5mm cable of unknown origin. L-E L-N N-E all 0 volts. Insulation resistance between the ends all 1000M Ohm. No continuity any conductor back...
  14. antigua finedining

    Ring vs Radial for minimum voltage fluctuations

    I'm building a new property consisting of 4 sperate discrete buildings, all roughly in a straight line. My question: Is there any advantage to connecting the buildings supply in a ring rather than just daisy-chaining them (i.e. radial)? I was planning to run a single 1 AWG backbone supply up...
  15. N

    Voltage issue with led lights

    Hi Problem: I have 5 (240v) led lights in a bedroom on a single on/off switch (not dimmer) and all the leds worked fine until last w/end. Then with the switch being off, the leds would flicker/strobe. Switch on and they all work fine. Disconnected the switch completely and still the same...
  16. Nclleeon

    Live voltage at crank

    Hi everyone, I have a Vauxhall insignia 2.0 cdti non starter, cranks but no start. It also doesn’t crank very fast, tried new battery and still the same, it cranks kind of sluggish and the dash lights start to flicker, live voltage readings at crank drop from 12v to 7v, does that mean the...
  17. S

    Voltage Conversion from 120v to 220v

    Hi Gents, We will convert our shop voltage from 120v to 220v.We will replace the old transformer 75KVA-480v (208/120 V) by new one (400/230 V). The question is can I use the existed panel boards (see the information below) or not? see pic links please https://ibb.co/X3zqFqC...
  18. W

    Strange voltage when using dimmer switch

    Wondering if anyone else has had this, getting 24v between live and neutral at pendant when dimmer is off, which means the light isn’t fully going off it’s still sort of glowing. When I replaced this for a regular switch it sorted the issue, just wondering if anyone else has had this and if just...
  19. L

    Voltage on high res. extraneous part

    During an FLI test recently on a high resistance extraneous part (several thousand ohm) I decided to test what voltage appeared on the metal while the test was been carried out.I used a Metrel M1 3000.I measured approx 40 volt. Its well over 20 years since I conducted a similar test and my...
  20. Rockingit

    Voltage to boiler fan 'drops out under load'

    Just had a call from an M&E client of mine and good mate asking to pick my brains.... large 3ph biomass boiler with (I assume variable speed) 1ph fans internally. Says he's got 230v L-N/E on the connecting plug but when the fan gets connected there's nothing on the internal fan connections...
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