trip

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  1. mbu2ns

    EICR - RCD Wont trip on test button

    Hi all Still got a hangover from saturday but im struggling with one 🤣 EICR, everything tests ok until i press the button on the RCD and it doesnt trip. Tried 2 spare RCDs same thing. When i disconnect the sockets Neutral from the busbar it then works. Type AC 30ma 80A RCD What am I...
  2. P

    individual RCBOs or a main breaker RCBO? and what trip level 10mA or 30mA

    I have the feeling that I might have small currents running in the house. So first of all, I am considering to get a leakage clamp meter. But besides of this, I am also considering to replace the breakers with RCBO. But then the question, should I go for indivdual rcbo or just replace the main...
  3. rwkshaw

    RCD seems to trip without physically tripping???

    Hi, I seem to have an RCD that keeps cutting the power at random times without actually tripping, if I reset it, the power comes on and will stay on for anything from a few hours to a few weeks. I've been through all the obvious things, unplugging everything, plug in one at a time etc, nothing...
  4. Y

    Box ground causes rcd to trip at > 1amp

    I have just checked a double outlet and it trips at 18ma. It was supposed to be faulty. Washing machine had a bad heater which got replaced but using the same socket it kept tripping the rcd. Socket next to it worked okay. Replace double socket with a new one. At the same time ran an earth wire...
  5. M

    Trip MCB at times RCD too intervals days or hours; test if faulty appliance

    Hi I am asking for help as a novice and 1st time user of this forum. Recently started to experience tripping of MCB & sometimes with the RCD at random times, intervals can be days after resets or several hours. Could an appliance or appliances be overloading the circuit? How can I test an...
  6. R

    GFCI light pulses yellow under power draw from bidet seat but doesn't trip

    GFCI green light is lit when not under power draw. The bidet seat functioning causes light to pulse yellow (and creates a pulsing and knocking noise) but switch does not trip off. Green light returns when power is not drawn. The bidet seat is fully functioning and draws power normally when...
  7. sumith

    Can a bulb trip the fuse

    I have a bulb that causes the fuse to trip. Had it for a couple of years, make is Diall. Maybe it's dead now, but I don't understand why it trips the fuse. I did a continuity test and it fails.
  8. timhoward

    Occasional mystery trip

    I'm writing this mainly hoping something occurs to me while writing it! I got called to an occasionally tripping RCD. It's a Hager double height board, house is about 4 years old, 7 circuits on a type A RCD at top. Global IR on top row of 0.07M. So fault not present, therefore I could only hope...
  9. P

    Short circuiting dough mixer

    Hi, I’ve got a brand new dough mixer which won’t work. Out of the box it just popped when switched on and tripped the power in my shop. Using a voltage pen I’ve detected that there’s power getting into the circuit board but not out. Noticed the fuse in the board was gone so replaced it and when...
  10. timhoward

    MCB trip (not RCD) during loop test

    I just finished a garden room supply. The customer already had a CPN garage consumer unit that the last sparks left there, brand new in box, and with some misgivings I agreed to use it. It came to testing. Zs@DB of 0.3 ohms in garden room. CPN RCD main switch tripped x1 at 21ms The lighting...
  11. M

    The EC Fan keeps tripping the RCD

    Hi All, Weird matter happening here and I hope you can help! My 3 Pahse EC Fan is connected to a sensor and a controller for the temperature setpoint. A control panel to manage the EC Fan is in the room. EC Fan above faux ceiling. The panel has it's own MCB. The RCD is upstream, before the...
  12. G

    A retired Yank from Nebraska is coming to Edinburgh on a mission trip

    To the right person, I would make it worth someone's time for a couple of hours of face to face instruction when I got there. I have over 34 years of electrical experience over a wide range of avenues. I will be coming to Scotland the 2d week of September. Would enjoy exchanging a few back and...
  13. M

    UK RCD trip without appliance powering on

    I’m going to call an electrician out on Monday, but curious if anyone has any ideas about this fault: I have a new kitchen fitted and two existing ovens connected to existing Cooker circuit. Both ovens have been working fine. new 7.4kw hob has been just been fitted to replace a small 13a one...
  14. R

    If a type B MCB doesn't trip unless 5x nominal rating is hit, what's to stop the cable burning up?

    Just reading through my Student's Guide and wondering about nominal amperage. If guaranteed trip is 5x nominal amperage, what's to stop 2.5mm cable on a 20a radial circuit from running at 70a or something and completely destroying the cable/potentially your house?
  15. 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
  16. S

    How to co-ordinate circuit breakers trip for overload and short circuit?

    Can 50A B type circuit breaker be coordinated with upstream 50A C type circuit breaker to trip earlier on shorts and current overloads?
    • SparkyAus
    • Thread
    • ausie elec breakers circuit circuit breakers how to overload short short circuit trip
    • Replies: 1
    • Forum: Australia
  17. E

    Need a portable RCBO to trip faster than general

    I have a general RCBO (in attached image) Merlin Gerin multi 9 ID' clic 40A 30mA that protects a house and a second portable RCBO Siemens 10mA that protects a power strip. I tested different RCBO 10mA marked as sensible (some designed for bathroom, high humidity) in this portable power strip -...
  18. S

    RCD trip when power cut occurs

    Hello. we have had a few powercuts over past few months and am in middle of one at the moment where power has gone off a few times while DNO are trying to resolve issue. House is a mid 1980'S PME and on housing estate. Current setup is single RCD with mcbs. Am currently waiting for spark to...
  19. R

    MCCB Adjustable trip setting - cable rating

    Hi all, In general do you size the cable to the MCCB full trip setting rather than the adjustable setting for the load being supplied. In some cases upsizing the cable can be costly even from 320/400. One of the site engineers is adamant that it should be sized for full trip setting. I'm not...
  20. T

    Why does my main house consumer unit trip when the inverter switched to AC backup?

    Hello All Can I say to start with I am not an electrician but used to be a heating engineer (yes I can hear the groans). I have wired the installation myself using the correct wiring and isolators, racking and trunking and it is not grid tied it is purely off grid with a separate input for a...
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