In brief
- A distribution board is only as safe as the person who labelled, tightened and tested it, so competence has to be shown with records and a demonstration, not claimed.
- Ask for the board schedule, circuit chart, insulation resistance and continuity results, and a torque wrench check on a sample of terminals.
- Compare what the bidder claims against one recent board you can walk to, and check the contract for what testing and handover documents it requires.
Contents
Distribution boards competency risks Qardho start with a simple gap: a bid can claim years of board work, but nothing in the paperwork proves the person who will wire your board can identify a circuit, torque a terminal or test it before energising. Ask for the board schedule, test records and a short demonstration on site before you compare prices.
What does a distribution board claim actually prove?
A claim of experience proves very little on its own, because board work is judged by records and by what happens at the terminals.
Dust and heat affect boards. The mechanism is straightforward: loose terminals heat up under load, mixed or unlabelled circuits make isolation unsafe, and a missing neutral or earth link can leave a circuit live when someone believes it is dead. What a board needs in any environment is a sealed enclosure, a fixed schedule, and terminals tightened to the figure the manufacturer states, not by feel. Confirm what conditions apply on your site, such as dust, humidity or salt air, and check the enclosure and gland details against the project specification and your engineer.
A useful proposal names the board schedule, the make and rating of the main switch and breakers, and the tests to be done: insulation resistance, continuity of protective conductors, polarity and a live functional check of every circuit. Confirm these against the project specification and the engineer, because requirements vary between clients.
Ask the relevant local authority what records it holds and what it requires for a completed building, and ask the bidder to name the last three boards they wired and who inspected them.
Where does unverified capability show up in Qardho?
Unverified capability shows up first in the paperwork and then in the panel itself, and both are checkable without opening a single breaker.
Start with the documents. Ask for the board schedule, the circuit chart with each way named, the test results with instrument details and the date, and the cable sizes and breaker ratings as installed. Where a bidder cannot show these, treat the electrical price as incomplete rather than cheap.
Then walk a recent board with the same crew, ideally one still accessible. Look for a schedule fixed inside the door, cables dressed and numbered, spare ways left for future circuits, glands and trunking sealed against dust, and terminals that have been checked with a torque wrench rather than by feel. Ask the electrician to isolate one circuit and prove it dead.
None of this proves the ground or the incoming supply condition at your plot. Ask whoever issues the supply connection for the area about the supply arrangement before the board is ordered, and confirm the earthing arrangement with your engineer.
How do you close the gap in the contract?
Close the gap by writing the evidence into the contract before work starts, so competency is a deliverable rather than a promise.
List what must be handed over: the board schedule and circuit chart, test results signed by the person who did the test, breaker and cable ratings, and a labelled panel photograph. Make energising conditional on the tests being witnessed and recorded, and state that the board is not accepted until the chart matches what is installed. Check what your contract allows in terms of retention, staged release and any hold point for inspection, and take advice if the wording is unclear.
A practical hold point is to inspect the board after wiring and before the cover goes on. At that stage the terminals, labels, earth bar and gland work are all visible. Confirm test values and acceptance limits against the project specification or your engineer rather than a rule of thumb, and keep a signed copy of every result.
What to do next
Before you compare electrical bids in Qardho, send every bidder the same written request: board schedule, circuit chart, test record from one recent board, and a date when you can see that board and watch a circuit isolation test. Score the answers, not the claims, and pass the results to your engineer before you sign.
Local reporting: this article is written for building work in Qardho and Puntland. Ground conditions, prices and rules differ between places; confirm the details for your own site.