insulation

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  1. A

    UK Oven element insulation resistance readings

    I have a dual grill element from an electric oven, one circuit of which trips the power when switched on. I have removed this to replace it and have since tested it with an insulation resistance tester. For the good circuit, I get a reading of 500MegOhms, for the supposed "bad" one, 20MegOhms...
  2. P

    Difference between 250v/500v insulation resistance and 15ma/200ma continuity test?

    Hi I hope everyone is all well. I’ve built a rig at home on some ply to do some testing and fault finding to prepare for my exam and just learn in general… I put 100v then 250v through L & N through a B22 led lamp and also the spur neon to see what reading I would get. They were both the same...
    • ppelec100
    • Thread
    • between continuity difference insulation insulation resistance resistance test
    • Replies: 5
    • Forum: UK Electrical Forum
  3. T

    Pat testing - low insulation reading

    Hi all, recently pat tested abit of equipment, it contains 24v power supplies, a frequency inverter, relays and a motor, its on a 13amp plug so requires pat test, however we get a low LN to E reading unless we disconnect the inverter. Reading is 0.9Mohms, is this normal or should you still...
  4. N

    Why does a fridge freezer fail an insulation Pat test?

    Hi, I am getting a reading of 0.00MOhm I've never had this before, it's not tripping the rcd. I was wondering if it may be damp but can't see anything obvious. Any ideas please? It's not very old.
  5. J

    Insulation resistance test readings.

    Had an interesting one today, ring circuit blown the Mcb in a kitchen apparently a few times over last day or so. It has blown once when nothing was really in use in kitchen so kind of ruling out overload. When turned up and turned it back on it held for maybe 5 minutes before blowing again…...
    • Jm1980
    • Thread
    • insulation insulation resistance insulation resistance test readings resistance test
    • Replies: 2
    • Forum: UK Electrical Forum
  6. A

    Insulation resistance results weird on actuator circuits

    Interested in people's thoughts/experience here. I've just been testing out the insulation resistance on a 20 year old surface water pollution control facility. It has a large number of penstocks with Auma actuators. Here's the puzzle: on a few of them, the resistance - although passable - is...
  7. KeenPensioner

    Insulation Resistance

    As an adult learner I understand that any equipment connected to a circuit that may be damaged by the IR test voltage should be disconnected. I watched an electrician carry out an EICR on a property I rent. On a ring final circuit he removed the plugs fom the sockets before carrying out the...
  8. A

    Insulation resistance problem

    Hi all, Stuck on another job here IR testing. It's a simple 3 bed semi and after short put L-N at board and testing to earth, I'm getting 0.16 Mohms. I've disconnected main incoming neutral, no surge protection of any kind in the house, I've taken out all lamps and plugged out anything I...
  9. shanky887614

    For Sale Megger MIT30 30-kV High Voltage Resistance Insulation Tester 30kv. VAT Included

    Megger MIT30 30-kV High Voltage Resistance Insulation Tester 30kv. $1700 shipped PayPal F&F accepted only. In great condition, like new. Recently calibrated- valid till 23.05.2025 Comes exactly as pictured with standard leads, power cord and manual.
  10. R

    UK Powered speaker tripped circuits four times over a couple weeks, insulation tester result seems ok, need advice.

    Hello, stating I am not an electrician, I have purchased a fairly expensive set of used powered studio monitors and I’m concerned about one of them. I was switching the power switch at the back and I’ve switched it off quite poorly where it went back on itself and as it was half way between on...
    • reprobate
    • Thread
    • advice circuits couple insulation powered result seems speaker tester times tripped weeks
    • Replies: 6
    • Forum: UK Electrical Forum
  11. J

    Feeder Wire - Wire Insulation is slightly under lug. Is this an issue?

    This is a 2/0 CU Feeder wire coming into the main subpanel on a 200A service. There are no nicks in the copper wire and from the front side everything looks good. But upon further inspection, the tiniest bit of wire insulation is under the lug on the back side. Does this pose any type of...
  12. A

    Help with Low insulation resistance reading

    Hello everyone, Hope you're all well. I'm carrying out an overall/global insulation resistance test on a newly wired 3 phase installation we did recently. I joined all 3 phase together to neutral and tested from the busbar to earth. I'm getting a reading of 1.33MOhms, and here in Ireland, we...
  13. N

    UK Induction Hob

    I am PAT testing an induction hob. It passes the Earth test, but then fails on the Insulation Test. Item is about 3 years old, no damage to unit or cables both inside and outside....Any thoughts
  14. A

    Insulation resistance testing live conductors to earth

    Hello all, I hope you're all keeping well. I have a question regarding insulation resistance testing. Whether doing a single circuit IR test or a global IR on an entire installation, I usually try to remove all loads, eg lamps, neons etc, but obviously this isn't always possible. So I...
  15. S

    Insulation test L to E long length of SWA

    Insulation test live to earth = 0.7 ohms. This is a long length of buried swa cable (approx 100m) from mains in to submain. Test done with live and earth disconected at main and with switch off at sub main. Question - is this an accurate reading or am I misding something. Its a big job to...
  16. C

    Moving cables and sockets/switches over insulation

    Hi, I'm about to reroute cables and sockets/switches from the ceiling down to the socket height after insulating a wall. I understand this will derate the cable, so what it the best way to do this please? EDIT: Should be in DIY Camerart
  17. S

    Any ideas on testing eicr insulation voltages.

    Been advised its OK for 250v insulation test on eicr but not sure
    • Sparky Stevo
    • Thread
    • eicr ideas insulation testing voltages
    • Replies: 2
    • Forum: The Welcome Forum
  18. J

    Insulation Testing Query

    Quick question. I am new to electrical installation so please be patient. You guys are great at answers. Re Insulation Testing. Why if I test using 250vdc to a get a lower reading of 105meg but infinity at 500vdc. Ring circuit and everything disconnected (I hope 😂). Also meter warna of 40v for a...
  19. D

    Insulation testing problems

    Hi all, if I’m getting an insulation reading of 0.03 across N & L on a lighting circuit what would cause this? Neutral earth, live earth, are in the acceptable realms.
  20. finsends

    Insulation of electrical power pole

    Hello, I have a fairly big property and to get power to the house, there are several metal poles with the cables running along them. I had multiple issues with lightning strikes and suspect that the lightning hits one of the poles and reaches the house through that route. Additionally, the...
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