Your chargeman inspects monthly. Here is what that inspection cannot see.

7 min read · Updated 9 August 2026

Every proposal we send for an electrical health assessment meets the same reply, usually early and usually reasonably: we already have a chargeman, and he inspects the switchroom every month.

That is true, it is required, and it is not a bad answer. It is also the beginning of the question rather than the end of it — because the regulations that mandate the visit are silent on what the visit is supposed to find.

What the law actually asks of him.

Malaysia's regime is more prescriptive than most people assume. Regulation 67 of the Electricity Regulations 1994 requires a competent person to visit and inspect monthly for an installation up to 600 V fed through switchgear rated 100 A or above, twice monthly between 600 V and 11 kV, and four times monthly above that. Regulation 68 requires a written report within two weeks and a record book kept open to the Commission. Regulation 110(3) adds a five-yearly check and test. Skipping any of it is an offence.

So the frequency is settled, the accountability is settled, and the paperwork is settled. What is never settled is the content. Neither “visit and inspect” nor “checked and tested” is defined anywhere in the Regulations, no method is named, and nothing requires the installation to be examined under representative load. We have set that argument out in full, with the gazetted text and our commercial interest declared.

What the eye can reach — and where it stops.

A competent visual inspection genuinely finds things. Physical damage and corrosion. Water ingress and staining. Rodent entry. Missing or illegible labels. Obstructed access and blocked ventilation. Cable damage at glands. Discolouration or a burnt smell where something has already been running hot long enough to leave a mark. Doors that no longer seal, covers left off, temporary repairs that became permanent.

Every one of those is worth finding, and none of it is what we are talking about. The limit is simpler than it sounds: the switchgear is closed. The busbars, the terminations, the breaker contacts and the cable tails all live behind a steel door that is shut precisely because opening it on a live board is dangerous. Sight stops at that door.

The two failures that never look like anything.

A connection heating under load. A termination loosens through thermal cycling, vibration, or a torque that was never right. Resistance rises, and the joint begins dissipating heat in proportion to the current through it. Nothing about it looks wrong. It is not visibly loose — a bolt backed off a quarter turn looks exactly like a bolt that is tight. It becomes visible only once it has run hot long enough to discolour the conductor or the insulation, which is very late in the sequence. Until then the only thing it emits is heat, behind a closed door, and the practical way to find that is a thermal survey taken while the board is carrying representative load.

Discharge inside the insulation. On medium-voltage switchgear, insulation that has begun to degrade sparks in small, repetitive bursts across voids and along contaminated surfaces. It erodes the insulation further each time. It is inaudible, it is invisible, and it is happening inside a solid material or inside a closed enclosure — so there is no surface for anyone to examine. What it does emit is airborne ultrasound at the openings and transient earth voltage on the enclosure cladding, which is what TEV and ultrasound screening listens for.

Both faults share the same awkward property. They give no warning that a person is equipped to receive, and they are progressive — each one is worse next month than it is today. A monthly inspection performed diligently for a year can record twelve clean visits while a joint quietly cooks.

Say plainly what this does not prove.

It does not prove that instruments would have prevented any particular failure. We do not have that data and neither does anyone else selling it to you: the Energy Commission classifies the cause of an accident, not whether some inspection method would have caught it beforehand. It does not make a thermal survey a legal requirement — the Regulations name no method, so nobody can honestly tell you the law demands one. And it does not mean the monthly inspection is theatre. It is mandatory, it is useful, and removing it would be illegal as well as stupid.

The claim is only this: sight has a boundary, the boundary is the panel door, and the two failure modes most likely to take an installation down live on the far side of it.

What to add, and in what order.

None of that displaces the chargeman. It sits alongside a monthly round that continues exactly as before, and it exists because the regulations that created that round never told anyone to look for heat or listen for discharge. We sell these surveys, so weigh our enthusiasm accordingly — and then go and read regulation 67 for yourself, because that part does not depend on us at all.