SPARKY STUDY NOTES sparkystudynotes.co.uk/learn/the-insulation-resistance-tester-and-the-ir-link
Free notes
The insulation resistance tester, and the IR linkWhat range does an IR tester cover?
Free from the notes: the section word for word as members see it, and a PDF to keep.
The notes
Exactly as they are on the site.
Exams ask which single-purpose instrument does which test, so know this one separately from your multifunction tester.
| Instrument | Range to look for |
|---|---|
| Insulation resistance tester | A megohm range that reads below 1 MΩ and tops out at 200 or 2000 MΩ, depending on the instrument |
The IR link. For a line-and-neutral-to-earth test you need the two live conductors joined. A small magnetic link — two magnets and a short wire, about £20 — bridges the line at the main switch to the neutral bar, so you can test the pair against earth with your other lead. Not to be confused with a calibration check card, which does a different job.
Free section from Sparky Study Notes. The full Level 3 notes, 1,463 practice questions and the video lessons: sparkystudynotes.co.uk
Test yourself on it
The tests are in the members’ area. Get one wrong and it shows you why, and where to revise.
Get new notes and exam tips from Sparky
About one email a fortnight. Unsubscribe any time. Privacy noticeThat was one section. There are 583.
Sparky Study Notes is the whole Level 3 syllabus written up like this: the explanation, the worked example, and where it is in your book. With a video lesson for every part and a practice paper for every exam.
- 583sections of written notes
- 35video lessons
- 1,463practice questions
- 146diagrams, redrawn
- 18th Edition
- Building Regs
- PAT
- Fundamental Inspection & Testing
- Initial Verification
- Periodic Inspection & Testing