7 signs your commercial building has an electrical problem you shouldn’t ignore

For a Melbourne business, an electrical fault is rarely just an inconvenience. It’s lost trading hours, damaged stock or equipment, and a genuine safety risk to your staff and customers. The good news is that most commercial electrical failures give off warning signs for weeks — sometimes months — before they turn into an emergency.

Knowing what those signs look like lets you call a commercial electrician in Melbourne early, while it’s still a small, planned repair, instead of after hours, with the power down and the doors shut.

Here are seven of the most common warning signs we’re called out to, and what each one usually means.

Dealing with a commercial electrical fault?

Whether you’re chasing a recurring fault, upgrading a tired switchboard, or keeping your premises safe with regular maintenance, the team at Briggs Electrical is here to help. Call Briggs Electrical on 1300 300 222 for trusted commercial electrical services across Melbourne.

Why electrical problems hit commercial buildings harder

Commercial electrical systems aren’t just bigger versions of the wiring in a house. They carry much heavier loads, often run close to capacity, and stay switched on far longer each day. A single fault that would be a minor nuisance at home, a tripping circuit, or a warm outlet can take an entire site offline when it happens in a shop, office, warehouse, or factory.

That’s why the warning signs below are worth taking seriously. They’re not always dramatic, but in a commercial setting they escalate faster and cost more. If you’re not sure where the line sits between domestic and commercial work, our guide on what a commercial electrician actually does breaks it down.

7 warning signs your commercial building has an electrical problem 

Most commercial electrical faults show themselves well before they fail. Here are the seven we’re called out to most often, and what each one is usually trying to tell you

1. Lights that flicker, dim, or buzz

The occasional flicker isn’t always serious, but persistent flickering, dimming when equipment switches on, or an audible buzz from light fittings usually points to a loose connection, an overloaded circuit, or an ageing switchboard struggling to keep up. In a retail or hospitality space it also looks unprofessional to customers. Don’t write it off as “just the lights” — it’s often the first symptom of a circuit that’s under strain.

2. Circuit breakers or safety switches that keep tripping

A safety switch is doing its job when it trips once. When it trips repeatedly, it’s telling you something is wrong, damaged wiring, a faulty appliance or machine, or a circuit carrying more than it’s rated for. Resetting it again and again doesn’t fix anything; it just delays the diagnosis. Frequent tripping is one of the clearest signs to book an electrician, and if it won’t reset at all, treat it as urgent and call an emergency electrician.

3. A burning smell, scorch marks, or discoloured outlets

This one isn’t a “monitor and see.” A burning or fishy smell, scorch marks, or browning around an outlet, switch, or the switchboard means heat is building up where it shouldn’t be, and heat is what starts electrical fires. Switch off the affected circuit if you safely can, keep people clear, and get a commercial electrician on site immediately. Faulty equipment and overloaded wiring are common culprits in commercial buildings, and they need an electrician who knows where to look.

4. A warm switchboard or an old, overcrowded one

Your switchboard is the heart of the building’s electrical system, and it should never feel warm to the touch. Warmth, a faint hum, or a board that’s visibly crammed with added circuits and old fuses is a sign it’s working beyond what it was designed for. Many Melbourne commercial properties are still running switchboards installed for a much smaller electrical load than the business now uses, which is exactly how a switchboard overload happens. Upgrading it is far cheaper than dealing with failure.

5. Power that drops, surges, or can’t keep up with demand

If equipment cuts out when other machines start, power points feel inconsistent, or you’re relying on double adapters and power boards to get enough outlets, the building’s electrical capacity no longer matches the way you actually use it. Beyond the disruption, power inconsistencies quietly damage sensitive equipment — POS systems, fridges, computers, machinery — and that damage adds up long before anyone connects it to the wiring.

6. Buzzing, crackling, or humming from outlets or the switchboard

Electricity should be silent. A buzz, crackle, or hum coming from an outlet, switch, or the board itself usually means loose wiring or arcing — electricity jumping a gap it shouldn’t. Arcing generates serious heat and is a recognised fire risk, so noises like these warrant a prompt inspection rather than a wait-and-see.

7. Electricity bills creeping up with no clear reason

A steady rise in your power bills that doesn’t match a change in how you’re operating can point to faulty wiring, failing equipment, or circuits drawing more than they should. It’s easy to blame the energy retailer, but an unexplained climb is worth having checked, the fault that’s inflating the bill is often the same one heading toward a failure.

Why “temporary fixes” end up costing more

The pattern we see most often isn’t a business ignoring a problem outright, it’s a quick patch that holds just long enough to be forgotten. The breaker gets reset, the dodgy outlet gets avoided, the flickering light gets a new globe. Then it fails properly at the worst possible time.

In a commercial setting the real cost isn’t the repair, it’s everything around it: hours of lost trade while the power’s out, stock or equipment damaged by the fault, an after-hours call-out rate, and the compliance and insurance exposure if something goes wrong and the wiring wasn’t maintained. Under Victorian workplace safety duties, keeping electrical installations safe is the building owner’s and employer’s responsibility – WorkSafe Victoria sets out what that involves. Catching faults early through regular commercial electrical inspections is almost always cheaper than reacting to a failure.

Noticed any of these? Here’s what to do

Don’t attempt commercial electrical work yourself, and don’t keep resetting a system that’s trying to warn you. Book a licensed commercial electrician to diagnose the cause properly — and if there’s a burning smell, smoke, or a switch that won’t reset, treat it as an emergency and call straight away.

At Briggs Electrical, we’ve spent 20+ years working on commercial sites across Melbourne and Bayside — offices, retail, warehouses, factories, and strata properties. Led by A-Grade electrician David Briggs, our family-run team handles everything from fault-finding and commercial electrical services to ongoing maintenance, with 24/7 availability for the problems that can’t wait.

If your building is showing any of the signs above, get it looked at before it becomes a shutdown. Call our team any time on 1300 300 222 or lodge a job online.