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  1. A

    UK Plazma cutter causing SPD failure??

    I've just had a potentially nasty issue involving a Burnt out, type 2 SPD. My customer has been using a small plasma cutter, I don't have the exact details of the unit to hand, but it does plug in to a standard 13a socket outlet This is a new 100a single phase TT supply to a small commercial...
  2. M

    Voltage spike causing strange readings?

    Hi guys, Our client called us out to assess a fault in one of their buildings today, it turns out that certain circuits (those with fixed electronic equipment within them) are now acting as if there is no load and the neutral wires back at the board are now showing 230V to earth. Could a...
  3. Dan

    Solar Storm causing Northern Lights to glow! Show us your pics!

  4. T

    Sun heat on caravan cable causing meter box circuit breaker to pop?

    Could the sun’s heat on a caravan mains supply cable cause the fuse/circuit breaker at the meter box/supply end to trip?
    • TimGemm
    • Thread
    • box breaker cable caravan causing circuit circuit breaker heat meter meter box
    • Replies: 20
    • Forum: UK Electrical Forum
  5. P

    12v motor causing noise in 240v system

    Hi - On our small vessel we have a 12v failry powerful motor to run the autopilot, where the power is supplied by the boat's battery bank. On an 'independant' system we have 240v that is supplied via an inverter, but the power originates from the same battery bank as the 12v system. The...
  6. J

    C40 rcbo on ring main changes to b32 causing nuisance tripping

    Ring main was on a c40 rcbo so I tested the circuit everything was fine and dropped down onto a b32, It’s quite a long circuit but only serves about 10 sockets.The rcbo stays on but the client says trips frequently, I’ve been back and the rcbo stayed on the whole time, I then left and over the...
  7. B

    Fridge causing problems

    Hi, I have been having issues with our fridge causing my modem and video card on my pc to drop out. -They are on the same ring circuit, have been for years with zero problems. The problem has been happening the last few weeks when the fridge compressor cuts out, It might blink a little on...
  8. R

    EV charger causing ground overheating

    Had an EV charger installed in July last year. It’s wired directly off the mains. Since end of November anytime I plug the car in to charge, the earth/ground wire in the cabling in other appliances in the house is overheating and melting components of the appliance until the main RCD trips...
  9. T

    Voltage N to CPC causing Fan timer to continuously Run

    Hi All, Bit of a tricky number. I have recently installed lights / fans /toothbrush chargers and shaver sockets to a bathroom and En-suite. The house had been rewired a few weeks before(not by me). I tied into the existing lighting circuit and everything works fine apart from both extract fans...
  10. T

    What is causing burning and vibration and how to stop it?

    I am renting a room and at night, the floor gets searing hot (or feels that way) in places. I have noticed that this is where the ceiling light cabling runs on the lower floor. Similarly, where the ceiling light cabline runs on my ceiling, heat belts down. This happens whether the lights are...
  11. sythai

    High Ze causing headache !

    Hi Guys Any advice/ pointers would be appreciated 😉 Have ‘pretty big’ new build house we’re wiring from scratch. New supply in from DNO is PME, but we have Ze of 0.51 😕 Are DNO obliged to keep this under 0.35? Wouldn’t be that much of an issue normally if regular size house and meter was...
  12. M

    UK USA transformer causing lights to flicker???

    Hi, I have American tenants who use transformers. When they do, the lounge spotlights and kitchen light flickers. These are on dimmers. Can something be done about it?? TIA!!
  13. S

    Harmonic distortion causing high loss??

    I am busy investigating why my household has an unusually high electricity consumption. Over the past few weeks I have been manually measuring the consumption of many electrical devices in my house (such as the TV, computers, washing machines etc) in order to determine what could be using high...
  14. Z

    AC compressors causing flickering lights

    We have two units (with separate meters and panels) in a residence that underwent a major renovation about two years ago. During the renovation, the HVAC system was replaced and new recessed lights and light fixtures were installed throughout. This summer, when the AC compressors are running...
  15. S

    Could this socket be causing circuit to trip every 3-5 days?

    Hi, I've been getting my house socket circuit tripping about twice a week. We only moved in about 3 months ago. I've been going around checking all the socket connections and today came across this one in one of the bedrooms. It didn't have the neutral fixing screw tightened so I've secured that...
  16. T

    UK PIR Sensor causing other lights to turn off

    I have a ceiling PIR motion sensor fitted in my cloakroom that sometimes causes my kitchen lights to turn off when the sensor is triggered. Basically, if my kitchen lights are on and I walk into my cloakroom they sometimes switch off. This doesn't happen all the time. The PIR itself seems to be...
  17. A

    Wet UFH pumps causing RCD tripping

    I have a customer with a problem of RCD tripping caused by the wet UFH systems. There are 5 UFH areas each with a Wilo Para pump attached. Along with this there are 5 Grundfos pumps assisting the flow of water around the property. The System is setup with Heatmiser NeoStats wired through the...
  18. R

    What is causing my breaker contact to glow red?

    Hello, I own a 1971 Mobile Home with Aluminum Wiring. Recently I had trouble with corrosion causing arcing at the metal clip area of my old breaker. I decided to buy two new breakers. I installed two new original equipment 15 Amp Breaker (aftermarket as original company is no longer in business)...
  19. wsoppitt

    What sequence to identify intermittent fault causing rcd to trip .

    Guys / Girls. How do you tackle an intermittant fault that only occurs once or twice every few weeks. What is the sequence you would use to identify and locate the issue.
  20. Pretty Mouth

    Series arcing causing MCB to trip

    I recently fixed a fault on a lighting circuit. The fault became apparent after some work I had carried out - I rewired part of the circuit for an ensuite refit, plus some additions to other circuits supplied by the same CU. I needed to provide RCD protection to the circuits that I had worked...
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