How do you check earthing installation competency in Qardho?

Earthing installation competency risks in Qardho start with paperwork that looks complete but was never tested on the plot. A certificate, a reference letter or a confident site visit does not show that the installer understood electrode depth, connection quality or soil conditions at that specific location. The gap opens when a client cannot tell the difference between a claim and evidence.

What does earthing actually do, and why does competency matter here?

Earthing gives fault current a low-resistance path to the ground, so protective devices trip and metal parts stay safe to touch. If the path is too resistive, a fault may not clear quickly, and someone touching a metal enclosure or a wet tap can receive a shock. Competency shows in three places: choosing an electrode arrangement that suits the ground, making connections that will not corrode, and testing the result rather than guessing it.

In Qardho the ground can be dry and stony for much of the year, and the water table depth varies between plots. That means the same electrode design may not perform equally next door. Ask the municipal engineer's office whether it holds any borehole logs or soil information for the area, and treat any answer as a starting point, not a guarantee. The installer should be able to explain why they chose a particular depth, spacing or backfill material for this plot.

How do you separate a claim from evidence?

Ask for three things: the test record, the method, and the person who can explain both. A useful test record names the electrode location, the depth driven, the instrument used, the date, the reading and who took it. A general statement such as "earthing done, tested OK" is not a record. Ask whether the reading was taken with a dedicated earth tester or a clamp meter, because the two answer different questions.

Then verify on site. Walk the route from the electrode to the main earth bar, look at the connections, and check that the conductor is protected where it enters the ground or the building. If the earth pit is covered, ask for it to be opened for inspection before backfilling or before handover. General practice is that earth electrodes are driven deep enough to reach stable moisture and that connections are mechanical and protected against corrosion; confirm the exact depth, spacing and test values against the project specification or the electrical engineer's design.

If the contractor cannot produce records, do not accept a verbal assurance. Ask for the test to be repeated in your presence or by a third party you engage.

How do you close the gap before you hand over?

Write the verification into the contract before work starts. The specification should name the test, the acceptable result, who witnesses it, and what happens if the result fails. Check what your contract allows regarding retention, staged payments and re-testing, and take advice before changing payment terms.

During the work, keep a simple file: a photograph of each electrode before backfill, the test record, the instrument serial number if available, and the name of the person who signed it. When a new contractor takes over maintenance or a later extension, that file tells them what is buried and where.

What to do next

Before the next payment or handover, ask the contractor for the earthing test record for this plot, including electrode locations, depths, instrument and readings. If it is missing or unclear, arrange a witnessed re-test with an engineer or laboratory you choose. Write the result into the handover file and keep a copy with the as-built drawings.