Condo Main Switchboard (MSB)
Thermal Scans, Shutdowns & What the Report Means (2026)

What the main switchboard is, and what hangs off it

In a strata building, electricity arrives from the utility, passes the metering and then enters the main switchboard. From there it is split into outgoing circuits, each with its own protective device, that feed the rest of the building. When a committee talks about “the MSB”, it usually means this board and the room it sits in.

That split matters: the committee answers for everything up to the unit's supply point, and owners answer for their own DBs. Our strata common property guide explains how common property is defined.

Why switchboards fail: it is almost always heat

Switchboards rarely fail without warning. The usual story is a connection that slowly gets hotter until it burns, trips or damages the equipment around it. Common causes:

• Loose terminations: connections loosen with heating and cooling cycles and vibration, and a loose joint runs hot.
• Overloading: a building that has added loads over the years, such as more aircon, car park lighting or EV chargers, can push feeders past what they were designed for.
• Corrosion and moisture: a damp or poorly ventilated switch room corrodes contacts and busbars.
• Dust and pests: dust holds heat and moisture; rats and insects inside a board cause faults.
• Ageing devices: breakers and contactors wear, and their internal contacts can overheat.

The warning signs residents notice are a burning smell near the switch room, repeated tripping of the same common-area supply, discoloured or crackling equipment, and lights that dim when a lift or pump starts.

What a thermal scan is, and what it cannot do

A thermal (infrared) camera shows surface temperature as an image. Pointed at a switchboard that is carrying its normal load, it shows connections and devices that are hotter than their neighbours, which is where a fault is developing. Because the camera does not touch anything, the board keeps running while it is scanned.

• It needs load: a lightly loaded board at night can look fine. Scans are best done when the building is busy.
• It needs a line of sight: covers usually have to be opened by a competent person so the camera sees the terminals.
• It compares, it does not diagnose: a hot spot says where to look, not why. The cause is confirmed when the board is isolated and opened up.
• It misses what is hidden: joints behind barriers, inside cable trays or in equipment that is switched off will not show.

So a scan complements, rather than replaces, the hands-on part of maintenance: tightening, cleaning, testing protective devices and updating the labelling. Our commercial electrical maintenance guide lists thermal inspection as one line of an MSB's maintenance.

When a thermal scan makes sense

• As part of a planned preventive maintenance programme, scheduled for a busy period of the day.
• Before and after new loads are added, such as EV chargers, a larger pump or extra common-area aircon.
• After a burning smell, a repeat trip on the same feeder or a visible scorch mark.
• At handover from the developer, or when a new managing agent or committee takes over and wants a baseline.
• Before insurance renewal, when the insurer asks what the committee has done to manage fire risk.

How often your particular installation should be inspected depends on the installation, so ask the registered person responsible for it and keep their written answer with the records. Our planned preventive maintenance guide shows how the switchboard fits into a whole-building schedule.

Reading a thermal scan report

A useful report is more than a folder of colourful images. Each finding should have an ordinary visible-light image and a thermal image of the same spot, the load at the time, a description of the component, and a priority. The table shows how findings are commonly read.

Ask for the findings as a ranked defect list with a recommended timeframe for each, then track that list at committee meetings until every item is closed.

Planned shutdown servicing: running it for residents

Fixing what the scan finds, and most hands-on MSB servicing, needs the board isolated, which means some or all of the building loses power for a period. A well-run shutdown is mostly communication:

1. Agree the date, start time and expected duration with the contractor, and plan for a quiet period.
2. Give residents written notice through the usual channels, and remind them again the day before.
3. Check what stops: lifts, water pumps, security gates, access cards, car park barriers, CCTV and the intercom.
4. Arrange for lifts to be brought to a floor and parked, and keep a staff member at the guardhouse for manual entry.
5. Confirm what the fire panel and emergency lighting run on during the outage, and how the generator will behave.
6. Afterwards, restore supplies in stages, check every common service, and circulate a short completion notice.

Who may do the work

The position on our commercial electrical maintenance guide is the one to follow. Wiring and electrical installation work in Malaysia must be carried out by a wireman registered with Suruhanjaya Tenaga (the Energy Commission) under the Electricity Supply Act 1990, and larger or higher-capacity installations fall under the supervision of a registered chargeman. Where work touches the supply, such as a capacity change or load assessment, that is a matter for a competent person registered with Suruhanjaya Tenaga.

In practice, ask any contractor to name the registered person who will supervise your installation and to show their current registration, and confirm anything unclear with Suruhanjaya Tenaga directly.

The committee's part: records, budget and tenders

Keeping the switchboard safe is part of maintaining common property, so it belongs in the JMB or MC's planning rather than in emergency spending. Keep a file with the scan reports, the defect list and its status, shutdown notices and the registration evidence of whoever did the work. Budget recurring inspection from the maintenance account and major replacement from the sinking fund. Our JMB responsibilities guide covers the committee's duties.

Adding EV chargers and other new loads

Condos are adding EV chargers, bigger pumps and more common-area cooling. Every one of these is a load question before it is an installation question: can the feeder, the board and the incoming supply carry it? A thermal scan before and after a new load is added gives a simple check that nothing is running hotter than before. Our commercial EV charging guide explains the capacity questions.

What switchboard maintenance costs

Thermal imaging is quoted per job on our guides, because it depends on the number of boards, access and whether a report is needed for insurance. The nearest published figures are the maintenance engagement bands (indicative 2026, Klang Valley).

Questions to ask before appointing anyone

• Who is the registered person supervising the work, and may the committee see their current registration?
• Will the scan be done under normal load, and at what time of day?
• Will the report show an ordinary image, a thermal image, the load and a priority for each finding?
• What will the shutdown affect, how long will it take, and who restores and checks the common services?
• Is repair of the findings priced separately, and how?

How ClickBina can help

Switchboard scans and servicing are quoted case by case. WhatsApp us your job details for a quote: the building, how many boards, when it was last serviced, and whether you have had trips, smells or new loads. We reply within the hour, the price we agree is a flat price with no hidden charges, and a site visit is RM150, waived if you go ahead.

Sources & methodology

• ClickBina commercial electrical maintenance guide — MSB maintenance scope and who may legally do electrical work.
• ClickBina planned preventive maintenance guide — board thermal checks in a strata schedule.
• ClickBina building maintenance services guide — ad-hoc visit and monthly retainer prices.
• ClickBina electrical safety inspection guide — unit safety check price; thermal imaging quoted per job.
• ClickBina convenience store fit-out guide — site visit wording.

How we estimated prices: every RM figure on this page is quoted unchanged from the ClickBina guides named above. They are indicative Klang Valley market ranges for 2026, not fixed rates.