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seconds

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  1. R

    I am looking for some advice. My boiler and tv seem to trip for a few seconds almost every day.

    They are going off and back on but not tripping at the fuse box. Could anybody tell me what could be the cause and if this is dangerous? Thanks
  2. Doctrader

    Lighting fixture flickers for like 10-15 seconds, just very slightly, then stops

    Hi! I have a fixture that flickers for maybe 15 seconds when I first turn it on. Then it stops flickering and functions normally. Then if I were to turn the switch on soon after it stops, there is no flickering. Then if I wait 30min or so and turn it on again, it flickers just briefly again...
  3. R

    RCBO Trips After 10 seconds

    Hello - I wonder if anyone can give me some advice about the following: My house has two outside lighting circuits (front lights and back lights). These are controlled via separate switches which are connected to a 6amp RCBO (30mA B curve) in the CU. Each circuit has 20x GU10 LED spots at 5w...
  4. N

    Downlighters in bungalow switch off after a few seconds

    Recently moved into a bungalow and discovered the 240v downlighters in the hall and bathroom turn off after a few seconds. They cant be overheating in this short period. Any ides please?
  5. S

    Please help me with this Capacitor, SCR, low resistance coil problem!!

    I want to discharge capacitor in micro seconds, In order to to that I used very low resistance coil but When capacitor is discharged, SCR kinda blow up, meaning the positive & negative got connected together because of low resistance. What can we place in negative terminal to make sure that...
  6. D

    0.4 seconds or 5 seconds

    Just a quick question. This might sound like a stupid question so apologises. I'm slightly confused with the regs 18th edition when it comes to disconnection times. So I was taught in college that in the 17th edition that when a circuit is less than 32A then the maximum permitted time is 0.4...
  7. D

    The breaker on the right trips after anything from 30 seconds to an hour. I have only two led lights on this circuit

    The breaker on the right trips after anything from 30 seconds to an hour. I have only two led lights on this circuit. Can anyone please help? Source URL: DIY Electrical Forum - https://www.electriciansforums.net/forums/diy-electrical-forum.64/
  8. L

    Recessed Light going out after 20ish seconds...

    I'm led to believe a failing recessed bathroom light I have is usually due to the thermal protector. However I see none in my lighting circuit; the bulb connects direct to an IBL 5002 50VA transformer. My question is then is it likely the transformer that is faulty and can I replace it with...
  9. J

    My DC Fan wont spin fully, Only stutters and stops every 5 seconds

    I have a DC 24v Fan, which at full load uses around 7Amps. I brought a DC 24v 13A PSU Driver, which when i first tested the fan powered it just fine. After a week or so went by, I reconnected the driver again, and now the fan doesnt spin even 2% of what it did before. The fan just about...
  10. H

    Amendment 3 smoke alarm !!

    Nice ammendment 3 smoke detector
  11. H

    Fike Twinflex call point question.

    Hi. I have a Fike Twinflex system with a 402-0006 manual callpoint as the first item in the chain, followed by 8 sensors then another manual callpoint 402-0006 at the end of the chain. The callpoint at the end of the chain is set to eol end of line and its red light flashes as i would expect...
  12. G

    Recycle Asymmectrical Time Switch

    I'm working on a job where I need to make a pump switch ON for 15 seconds then OFF for 45 seconds then repeat ON for 15 seconds and OFF for 45 seconds etc...At the moment the pump is switched on by a contactor that is permanently energised while ever the plant is operational. Can anyone...
  13. ian.settle1

    Australian GP

    Hamilton on pole from Rosberg by 1/2 second some going that, hope he doesn't have the same problem as last year.
  14. 1Justin

    Is it a Distribution Circuit?

    TN system. Customer has 16A breaker from CU which supplies FCU to a boiler, but it also supplies a IP66 external box feeding SWA to garden shed DB. Since the circuit from the 16A breaker doesn't supply ONLY the SWA to the shed DB, (it supplies also end equipment directly - ie the boiler) -...
  15. L

    stereo and bell timer

    Hi all. Hope your all having a good day. Does anyone know a timer that will operate to work a bell or siren with a stereo. To turn off the stereo and sound a bell for breaktime. Im having trouble. I cant find one that will work both. Thankyou. Luke
  16. ringer

    Supplier's fuse, disconnection time and max Ze

    Have a job where Ze is 0.36 ohms on a TNC-S with 80A BS1361 suppliers fuse. The general rule, as per OSG (page 11), is if Ze is below 0.35 ohms then this is acceptable, but that relates to a 100A fuse (OSG fig 2.1 on page 15 refers). Now I believe that this installation should comply, so have...
  17. D

    Disconnection time with a PV sytem installed.

    Hello all. Could any experienced sparkies please please explain to me how RCD tripping times can be adhered to when a PV sytem is integrated into a domestic consumer unit if the inverter takes up to 5 seconds to isolate the AC outputwhich it feed to the domestic supply at the consumer unit. Fed...
  18. P

    P.A.T Testing I.T. Equipment

    On 'Pattesters' website they advise- When testing modern IT equipment it is not normal to performed a leakage or touch current test; these tests are usually used on older equipment in place of the 500 Volt insulation test. However in my copy of the IEE they say that touch current test should...
  19. S

    solar pv and automatic disconection of supply ADS

    forget type B rcd's at minute do we have to use a .30ma rcd to meet 17th edition requirments of .4 seconds disconection times for domestic solar pv system (16amp) even if cable is surface mounted outside in conduit ? regardless of Zs as its normally low anyways to gain 1% volt drop. but...
  20. M

    module testing? does everyone really do it?!

    Does everyone really test each individual pv module before putting it on the roof?! Given that it can be very time consuming im not so sure!? Honest replies only please!

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