causing

  1. 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...
  2. 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...
  3. D

    Changes to AM2 testing section causing more failures

    Has anyone else noticed that AM2 Testing now has 10 questions at the end and that they are a lot harder than pre-Sept22 AM2
  4. 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...
  5. 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...
  6. 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!!
  7. 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...
  8. 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...
  9. 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...
  10. 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...
  11. 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...
  12. 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)...
  13. 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.
  14. 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...
  15. M

    Why is my new 3 way dimmer switch causing my bulbs to flicker at high brightness?

    In my bathroom, ive got 2 switches that control the 5 bulb fixture over the sink. I replaced one with a 3-way switch dimmer, but not the other. When the dimmer is at the lowest setting, everything is fine, but when I raise the brightness, its flickers and buzzes. Where did I go wrong...
  16. I

    Rising Damp causing problems

    A friend is asking for help to sort out a dispute between her Builder and Electrician each blaming the other for electric under floor heating tripping the MCB. The electrician claims the problem is caused by rising damp. The builder says it is a faulty electrical installation. Separately there...
  17. P

    What might be causing clicking in my extension lead ?

    My 4 plug, 2 usb, surge protected extension lead started producing a clicking noise about 2 months after purchase. The clicks are every ~0.4 seconds and start as soon as the power is supplied to the extension lead, even when nothing else in the room is plugged in to anything. The clicks sound...
  18. D

    Re-wired bathroom ceiling rose causing bathroom and hall lamps to glow 'half' power

    Background Elderly relative asks neighbour to change the bathroom ceiling lightbulb. Neighbour starts to change lightbulb, drops and breaks fancy lampshade so fits a replacement ceiling rose. (Old rose wouldn't take a standard lampshade fitting.) After fitting the ceiling rose and checking the...
  19. G

    2004 Citreon C4 Alternator L/DFM wire causing parasitic draw.

    I've been having a problem with my car's battery draining overnight, I narrowed it down to the L/DRM wire of my alternator, It draws 80 milliamps while the key is off, I unplugged it overnight and it didn't drain the battery. Now I don't know why this would happen. Is it the alternator? or...
  20. D

    Whats causing a voltage increase on a water pump?

    Hello. I'm doing a favour for a farm friend, they have a water pump down a bore hole thats been slowing down recently. The single phase 0.55KW motor is situated 40m down the well and the controls are at the distribution boards. The voltage going to the single phase motor is reading L-E 247 &...

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