current

  1. A

    Why current sensing resistor is so tricky ?

    Hi I didn't understand why when i short the current sensing resistor , the psu/adapter become unstable (voltage dropping and noise) and forever, even if i restore the original resistor !!
  2. A

    how battery current flow

    Hi I know that batteries get constant voltage and variable current , but why (for ex. cell battery) has 5v rating as standard but not 1a std , i mean why the amp change (500mA , 1A , 2A ...) if voltage is always the same ?? (I didn't get that in simulation !)
  3. M

    delta transfomer current

    Hi All, anybody know the formula to find current on delta transformer?
  4. D

    What happen to laptop if run in AC current instead of DC and what are the effects

    Im just asking for curiosity,what happen if plug 240VAC directly to laptop charger port without DC adapter. What are the effect for laptop if plug in 240VAC into laptop???
  5. Jay 1987

    Harmonic current / distortion

    Hi guys I have a question, when we consider the assessment of general characteristics for any installation, who Measures /considers/ enquires about harmonics. is that the job of a normal Installation spark ? If it’s not who does it and how do they test for it? if it is the job of the normal...
  6. S

    RCD types and DC current

    So, this article...
  7. A

    LED Power Supply (Constant Current) suitable alternative help

    Hello, Can anyone offer me some help and guidance please, I'm struggling to source either the same direct replacement LED power supply or another that will work in it's place, to replace the one pictured. I need to buy three as all need replacing. Appreciated.
    • agmk00
    • Thread
    • alternative current help led power power supply suitable supply
    • Replies: 3
    • Forum: Lighting Forum
  8. R

    Advice on current path

    Morning gentlemen I am looking for some solid advice from fellow sparks on best route to go. I have been an electrician for 13 years. I started off in the domestic and commercial installations side of the industry. Completed my apprenticeship etc etc. 2009 hit and I was made redundant so I...
  9. R

    what do the current values mean in this meter?

    In the picture can be read 10(40)A. What is the capacity of the meter 10 A or 40 A, why are there two values?
  10. Basiluk

    Current monitoring display

    I am after a LCD/LED display that can be wired into a circuit (240v < 15a) and display the wattage/amperage being drawn on that current. I am not after a meter, but a continual real time display of the load on that circuit - This is for permanent installation. I cannot find anything that meets...
  11. dave_JL

    Which Oven To Buy With Current Wiring Set Up?

    Hi guys, Looking for some advice. We have this induction hob from IKEA SMAKLIG Induction hob - black - IKEA - https://www.ikea.com/gb/en/p/smaklig-induction-hob-black-20222830/ and a hotpoint single oven which has given up the ghost and needs replacing. I'd like to buy a replacement oven I can...
  12. R

    Ordered new breaker and want to make sure it matches the current breaker in the breaker box that needs replacing.

    I ordered the exact breaker that is in the breaker box and they sent me this one. I want to verify that it is compatible with one in the breaker box. I took a picture of each. Thanks in advanced the company won't answer their phone so I'm kind of stuck until I find out!
  13. G

    Regulation 434.5.2 - Time a conductor can withstand fault current

    Can anyone help me clarify the formula in regulation 434.5.2, the time a conductor can withstand a fault current without sustaining damage. t=k2 x S2 / I2 The regulation states I is the effective fault current. Does effective fault current mean the prospective short circuit current/...
  14. O

    Current limited charge relay

    Hi there, I am looking to charge an auxiliary windlass battery (130Ah lithium) that is located 35 feet away from my main bank (1030Ah lithium). My charging input will range from to 40 to 100 Amps, but I need to keep the wire size to a maximum of 6AWG. Do you know of any current limited charging...
  15. Megawatt

    Will isolation transformer absorb in rush current and not the generator

    I have a 10,000 watt surge and 7000 watt running capacity on a 240/120 vac generator. Now this is a theory I have electric heat with 10,000 watt heating elements. When the heating elements kick on it bogs down the generator to the point I have to kill the heat. The question is if I bought a 15...
  16. D

    Megger 1552 (Hi current test not tripping 30ma rcd)

    Hi guys, I own 2 megger mft 1552 testers. I recently found that loop readings on both testers give me high Zs readings on final circuits protected by 30ma rcds on low current. If I select the hi current setting I get a reading I expect to achieve, but the hi current test never trips the rcd...
  17. M

    Do I need over current protection?

    Hi guys, i'm working on some project, do i still need over current protection if i'm using a soft starter and do I still need circuit breaker for that motor???
  18. D

    High Earth current flowing

    I have measured high currents in the CPCs of four circuits as shown in the table below. This is the case both with the circuits energised and isolated. Removing the CPCs for these four circuits brings the current in the MET to DNO cut-out, back to genuine L+N measured leakage levels. However...
    • Deleted member 105166
    • Thread
    • current earth
    • Replies: 30
    • Forum: UK Electrical Forum
  19. K

    Current Transducer Wiring

    Hi All, i'm new to the forum and looking for a solution to measure the operating current across the point machine. Hence selected the current transducer(to read in 4-20mA) as per attached schemtic. The required wiring terminal nos of the transducer is shown in the model diagram. i want to wire...
  20. S

    Low current device on lighting circuit

    I've had a new smart door lock fitted to the front door. In order to get best usage I need to run a small electronic device called a bridge which will link this lock to the internet via bluetooth and wifi. The bridge requires AC power and is deigned to be plugged in to a socket. It needs to be...
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