current

  1. S

    Inductor lead or lag current

    Hello Inductor lead or lag current
  2. J

    How to protect inrush current

    Hello How to protect in rush current by ntc in smps
  3. A

    Calibration Fail on test current

    Hi all My Fluke tester failed on one test today while having it's annual calibration, the continuity resistance test current. Test Current - applied Value 205.0mA Measured Value 218.0mA Specification+- 10mA So a fail from the calibration company because it was 13mA. However I read ( on Line )...
  4. UKMeterman

    100 12V car batteries in parrell fault current testing

    A youtube video on 100 car batteries in parrell and what happens when various items are short circuit current tested...
  5. R

    Will 12vac replacing 120vac mitigate stray current situation?

    I have an inground pool with a 22 year old, 120vac light fixture in a niche connected to water-holding conduit running to a switch in an outbuilding. I removed the fixture to clean the niche. The fixture was just floating at the surface, still connected, with the wall switch off. A little extra...
  6. tony9i9i9i

    6242B Current Carrying Capacity and Volt Drop /A/m

    Hi, go easy on me please, I've just returned to the trade, well I am about to, I received my Gold Card last Thursday. I've been gen'ing up for a couple of weeks going through the regs book, watching some fantastic youtube videos, and working through cable calcs and looking at products and...
  7. E

    an overload current is classified as an overcurrent occuring in a circuit which

    an overload current is classified as an overcurrent occuring in a circuit which is electrically sound has a fault between phase conductors has a fault between Neutral and Earth has a fault between line and earth
  8. Plantman2000

    Is it ok to wire in wardrobe lights to a current switch?

    Hi all, after a bit of advise if ok please. We have a switch which currently only powers one single LED down light in our ceiling. From this switch I would like to add a feed (already installed) to provide power to three LED wardrobe lights. Max wattage is an extra 9w on top of the current 5...
  9. G

    Solutions for LED inrush current

    I am upgrading garage lighting. I have installed 12 40W batten lights (cheap Amazon variety - don’t have specs). 6A breaker in Garage consumer panel is tripping on inrush current. House consumer panel 32A breaker for garage is also tripping occasionally. Both are type B. No surprises so far...
  10. BitFrosty

    Constant current driver replacement

    Hey folks, i work for a relatively small company, but we are doing some big jobs. And right our headache is taking over outdoor lighting maintenance from other guys (you know that situation where the only way to know anything about light is to get up there on the pole and open it to read that...
  11. V

    Is this compliant with current safety standards?

    Hi first time on this forum and looking for some advice. I have a second home with incoming network connection as shown below. I don't like uninsulated wires attaching to the house like this and is dangerous when working with ladders etc. I have looked up the regs, 1988, and as far as I can...
  12. Lainan01

    How does fault current loop? "Earth Fault Loop"

    Confused as to what the earth fault loop is. I'm aware it's the path that fault current takes (Line-Earth) but how many times does fault current "loop"?
  13. G

    UK Updating current qualifications

    Hi guys, new to the forum. I qualified in 1988 with City & Guilds Electrical Installation Parts 1 & 2 15th Edition followed by both ONC & HNC in Electrical & Electronic Engineering and then finally a BEng in Electronic & Computer Engineering, I became a Chartered Electrical Engineer (IEE) in...
  14. S

    UK DNO Concentric cable current carrying capacity

    Had UKPN come out to a property recently to upgrade the main fuse from 60A to 100A but when they arrived they said that the supply cable which he confirmed is a 25sq.mm. CNE aluminium concentric cable (1-phase, burried) for the PME supply is only able to take a 80A fuse. They will have to dig...
  15. S

    Help with Ring Tabulated Current Equation

    Hi there I am struggling with the following calculation. 4mm Ring Final Circuit, In = 32A Cg - group of 6 with a correction factor of 0.57 Ci - 50mm insulation of 0.78 It = In/CgCi It = 32/0.57x0.78 It = 71.97A Then I get stuck here: Ib < In < It < Iz 4mm Cable from Table 4E2A gives Iz of...
  16. B

    Single and three phase current capacity and voltage drop differences.

    Hi All, From what I understand, working out the design current - Ib for single phase is quite easy (max appliance power/voltage). For three phase, do I take the max power, divide by 3 then divide by 230 to get the Ib? (We definitely use 230V for everything right?) Now for voltage drop, We...
    • bbudding
    • Thread
    • capacity current phase single three three phase voltage voltage drop
    • Replies: 7
    • Forum: UK Electrical Forum
  17. K

    Increase current amperage by using darlington transistor

    I'm using DC adapter 5.8 volt with 580 miliamp to produce 1.5 amp by using a pair of NPN transistor 2N3904 to be build as Darlington circuite. Is it possible?
  18. D

    Current measure with multimeter (help)

    Hello everyone, friends. In cases where I do not have a clamp meter, I want to measure the current drawn by the phases of a 3-phase motor with my multimeter. I left a picture below as an example. I connected my red probe to 10A., my black probe to Com. After turning the multimeter to 10A; For...
  19. E

    Do illuminated switches pass current to the load side when off?

    I installed an illuminated switch (switch is lit when circuit is off) for my porch light. I noticed that even when off, my LED porch lite is dimmly lit. I measured the voltage at the socket and it was 25VAC. Is this expected or did I install a faulty switch?
  20. J

    EV ultra cable, current carrying capacity

    Hi Doncaster EV ultra cable: Does anyone know what the current capacity of these cables is given particular reference methods? The spec sheet just says 'Max current' 45amps (for the 4mm) but it doesn't state the reference method. The manufacturer does have a very handy cable calculator...
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