Insulation resistance, earth loop impedance, RCD trip time, cable fault distance — the numbers an electrical inspection report actually needs are exactly what Megger's test equipment is built to produce. Z & F Corporation Ltd supplies 613 genuine Megger lines, the large majority of it electrical test instrumentation rather than general industrial stock.
What You'll Find
- Insulation & earth testers — analogue and digital insulation resistance testers, from hand-crank legacy models to modern digital units.
- Loop impedance & RCD testers — combined loop impedance and RCD testers for periodic inspection and testing (EICR) work.
- Clamp meters & multimeters — AC/DC current clamps and handheld digital multimeters, CAT III/CAT IV rated for site use.
- Low-resistance ohmmeters — micro-ohmmeters for bonding and continuity testing down to sub-milliohm ranges.
- Cable fault locators — including legacy faultfinder units still in service on older networks.
CAT rating matters more on this range than it might elsewhere — a CAT III meter used on CAT IV origin-of-supply work is a genuine safety gap, not a technicality. If you're not sure which category your work falls into, tell us where in the installation the testing happens and we'll confirm the right instrument.
A fair share of what we're asked to source in this range is older or discontinued Megger equipment — hand-crank insulation testers, superseded faultfinder models — still doing the job on sites that have no reason to replace working, calibrated test kit. Where a model has been discontinued, we can usually source remaining genuine stock or point to the direct current-production replacement.
Calibration & Traceability
Test instruments used for inspection and certification work are only as good as their calibration record. Where required, we can supply Megger test equipment with UKAS-accredited calibration certificates so the instrument is audit-ready on arrival, not just functional.
We are not Megger, and not an authorised Megger distributor — genuine stock only, sourced and supplied independently, with any brand-specific disclosure noted on the relevant product page. Test equipment ships worldwide with export documentation as standard; electrical contractors and utilities across South Asia, the Gulf, and Africa are regular customers for this range alongside the UK. See also Electrical Testing and Test Instruments for the wider range this equipment sits within.
Frequently Asked Questions
Can you source a Megger model that's been discontinued?
Often, yes — we source through multiple channels and can usually find remaining genuine stock or confirm the current direct replacement model.
Do you supply Megger test equipment with calibration certificates?
Yes — UKAS-accredited calibration is available on request, so the instrument arrives audit-ready for inspection and certification work.
How do I know which CAT rating I need?
Tell us where in the installation the testing happens (distribution board, sub-main, origin of supply, etc.) and we'll confirm the correct CAT-rated instrument.
