voltage

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  1. 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...
  2. 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...
  3. R

    Fox H1 max open circuit voltage,?

    I have 18 panels in 2 strings (37.8v open circuit voltage each) to be connected to a Fox H1 inverter. The manual says the below. Is the 600v open circuit voltage per string or for both strings combined? H1 series inverters can be connected with 2-strings of PV modules. Please select suitable PV...
  4. 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
  5. 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...
  6. 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...
  7. 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...
  8. HEXx99

    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...
    • HEXx99
    • Thread
    • machine too voltage
    • Replies: 26
    • Forum: USA
  9. 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...
  10. 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...
  11. 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...
  12. 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...
  13. Y

    12V voltage drop dual battery camper installation

    Hi there I can't wrap my head around a problem I have when trying to connect my dual 12v battery system in a camper. When I plugged in my VSR ( Orion from the brand Victron) i measured the + input was 3 volts although engine running (and app saying 14v input...). I thought the wire were too...
  14. 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...
  15. 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...
  16. 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...
  17. 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...
  18. 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...
  19. 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...
  20. J

    Uneven voltage on legs at main panel - troubleshooting?

    I have two main panels each 150amp breaker. House was built in 83 and lived here for 6 years no issues. About 6 months ago we had a power surge and our main ac fail (hard short) and tripped the breaker. Had the unit replaced but it seems since then we have had issues with lights diming and...

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