effect

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  1. stickinsect

    Effect of someone touching a device that is protectively earthed

    I am trying to calculate (as a theoretical exercise) what the effect would be if someone touched an electrical device that is protectively earthed. I would really appreciate it if anyone could verify my workings. I am assuming that the current flowing into the enclosure of the class 1 device is...
    • stickinsect
    • Thread
    • device earth resistance earthed effect electrical theory fault current someone
    • Replies: 3
    • Forum: UK Electrical Forum
  2. JanaWick

    How to calculate the effect of ground Enhansing material (GEM) in Earthing

    Can anyone advice me on how to take in the effect of Ground Enhansing Material (GEM) used in Electrical Earthing to reduse the earth resistance? in all the suppliers specification they only mension the GEM reduse the soil resistance drastically? so should i consider 1/5th,ro 1/10th or 1/100th...
  3. T

    Lost Neutral on 3 Phase system - how do you calculate the effect on line voltage

    I know the effect of a lost neutral (floating neutral) on a 3 phase system, and the theory of why the line voltages can vary. However, I have been attempting to show this by calculating the line voltages of a phase system at given loads on each phase. Lets say:- Red 296 Amps, Yellow 279 Amps...
  4. W

    I Need Work Available with immediate effect

    I have completed my 18th edition and have ecs card. I need employment to be able to progress with my training onto a fully qualified electrician. All my course has been self funded so no additional expense to an employer apart from wage.
  5. A

    Effect of SSEN "down tapping" our transformer

    Hi, This relates to our planned PV installation. The G99 application came back outside SSEN's limit for voltage rise, which for property connected at 240V is 1.3%. They will, for an estimated £2K, "look to" change our transformer to drop voltage in normal operation. "Alternatively we can look...
  6. yogesh

    VSD effect to energy meter?

    We have 10 energy meter in that 4x of them are giving the negative reading. The events shown are two 1is Negative Power Element 2 Warnings & 2. Negative Total Power Warning. The plant is not generating power & we are not sure where this export power coming from on site We have verified the...
  7. OnlQQker

    The Seebeck Effect....

    What I can't seem to get any information on is, 'does increasing the heat cause more electricity, if so what are the temperature ratings of the chromel & Alumel' wires?
  8. Dan

    Are lorry drivers (or lack of) having an effect on any of your regular supplies?

    https://www.theguardian.com/business/2021/sep/04/hgv-driver-shortage-uk-firms-embark-on-the-long-road-to-plug-the-gap https://www.theguardian.com/politics/2021/aug/29/food-beer-toys-medical-kit-why-is-britain-running-out-of-everything...
  9. timhoward

    "Smart" Dimmers and one side effect?

    Of late I've been using smart dimmers. And they do the job very well. In a couple of cases turning another light on in the middle of the circuit cause the dimmer-controlled lights to briefly go out and then light again. I'm guessing the dimmers are adapting to the change in circuit resistance...
  10. HappyHippyDad

    Effect on EVCP's when grant ends?

    @Gavin John Hyde has mentioned that the £350 grant is ending in March 2022. Could you post a link to this if possible Gavin? Just wondered what peoples thoughts are on how this will effect whether a customer chooses an OZEV registered electrician or one who is not registered? At present I would...
  11. M

    Radio Waves effect on AC applications

    Hi, I have an issue with a logging truck. I am using external generator 110V 60Hz. When using the Radio I found some application is not stable and this also affecting on logging data. Can you please advise how can Radio Waves affect on this? below is a video on this issue
  12. justcurioustwo

    can frequency changes effect the electrolysis process?

    A curious look at electrolysis After reading the quotes below which I got from another forum, I ask these questions ~~~~~ "Non-integer-frequency crystals will work well, as long as the crystal's frequency is between the microcontroller's maximum and minimum crystal frequencies. The non-integer...
  13. F

    Outside Led flood light has started to have a strobe effect when switched on

    Hi I have an led flood light just above the door on my shed. I went out to the shed tonight and as I switched on the LED flood light I noticed that it was acting out a strobe light effect. I switched it off then on again and it was strobing again... Anyone ever experienced this before and if so...
    • Foxy787
    • Thread
    • effect flood led light outside started switched when
    • Replies: 4
    • Forum: Lighting Forum
  14. Leyland30

    Electromagnetic effect in 4C Swa cable with high kA

    Hi All, hope someone can provide some clarity; We have a number of 400mm^2 4C Swa sub-mains subject to potential 43kA fault currents. Since the cables have TP&N contained within a shared SWA sheathing we were of the understanding that the electromagnetic response resulting in a violent and...
  15. H

    Please help - Could water effect a circuit?

    Hi, Today I pressure washed our outside pillars which all have light fitting on (all on the same circuit). When switching the power back on, only 1 of the lights is working out of 4. Any suggestions? Thanks in advance
    • Harry Lawrence
    • Thread
    • circuit effect help light lights please water where
    • Replies: 13
    • Forum: UK Electrical Forum
  16. Energetic

    Decorative/showcase trunking

    I have a project coming up that will need trunking in a very sunny very visible position in an orangery. Anyone know of something that is UV proof and kind of pretty? E
  17. G

    Radial off a ring circuit

    Hi all, I have been asked to add a couple of sockets and add power to an existing strip light (currently disconnected) in a garage. There is presently an SWA 2.5 mm cable that is apparently live but taped up, hanging loose in the garage which is fed from a 32a ring circuit located in a utility...
  18. S

    LED MR16s on DC LED drivers

    Struggling to find a consensus on this - is it OK to power MR16 LEDs off a DC power source? I have been asked to do this by a customer who has bought the lamps and transformers himself, but the MR16s actually say AC on them so I'm uneasy about it. He says he has connected them temporarily...
  19. N

    stroboscopic effect

    Spinning coin :-)
  20. happysteve

    Electromagnetic effect - switch drop in metal conduit

    Daft question alert! :) Is this ok? It seems to go against 521.5.1, as the neutral does not follow the line down to the switch and back in the steel conduit. But I don't think it will cause any electromagnetic effects... when the switch is open, there is no current flow; when the switch is...
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