You know you’re in trouble when turning on the heater causes the lights to flicker, there’s a faint burning smell near the TV cabinet, and whenever you run the dishwasher and tumble dryer at the same time, the lights go out and you have to reset the circuit breaker. The thing is, you’ve been living with these issues for so long that you’ve become used to them – they’ve become ‘just one of those things’.
One of our regular customers dismissed similar warning signs for months, thinking they were just part of living in an older home. When they finally contacted us, our inspection revealed dangerously overloaded circuits that could have resulted in a serious electrical fire.
The red flags your wiring is waving
“We don’t think people understand how important it is to pay attention to these warning signs,” says Chris French, owner of BW Henderson. “Tripping fuses, flickering lights, buzzing sounds from outlets, and discoloured power points are all telling you something’s not right.”
When your circuit breaker frequently trips, don’t treat it as an inconvenience. Each time it trips, it detects excess electricity flow that could overheat wires and cause a fire. Rather than resetting it repeatedly, treat it as an urgent indicator that your electrical system needs professional attention.
Flickering lights – particularly when appliances are switched on – indicate your electrical system is struggling under demand. It’s especially common in older homes where original wiring wasn’t designed for multiple modern appliances.
Faint buzzing or crackling from switches or outlets could indicate loose connections allowing electricity to arc across gaps. Even these faint sounds shouldn’t be ignored.
Power point danger signals
Power points should never feel warm or show discolouration. That brownish tint or plastic warping is evidence of excessive heat build-up – a primary precursor to electrical fires.
We recently had an urgent callout to a home where the family had noticed their lounge power point getting hot whenever they used their heat pump. “We pulled that outlet apart and found the connections had been arcing for weeks,” recalls Nick from BW Henderson. “The wiring was completely fried, and the wall cavity behind it was charred black. Another few days and they would have had a house fire.”
Electrical shocks, no matter how minor, aren’t normal. That small zap indicates potential grounding issues – electricity taking paths it shouldn’t, and sometimes through you!
Yesterday’s wiring, today’s demands
New Zealand’s old villas and homes built up until the 90s, are at serious risk of electrical fires. Why? Because their wiring is simply not designed for modern electrical loads.
“The biggest thing is the amount of load people are putting on electrical systems that were never designed for it,” Chris explains. “You should have a dedicated power point for a heater, not put it on a multi-box, because this can cause a fire.”
Today’s homes contain dozens of devices that didn’t exist 20 years ago. Combined with traditional appliances, these put major demands on electrical systems. Winter compounds this with increased heating and hot water usage.
Take control of electrical safety
Follow the ‘one socket, one appliance’ rule. Daisy-chaining devices through double adapters dramatically increases overloading risk, especially with heat-generating appliances.
If your home dates before the 1990s, your electrical system may require upgrading. Regular professional inspections identify potential issues before they become dangerous.
Smart monitoring systems provide enhanced safety. We recently installed one for a customer whose garage workshop kept tripping the main switch. The system now alerts them to any electrical irregularities, and last month it detected a fault in their workshop before it became a safety issue.
Don’t wait for that spark, buzz, or flicker
Don’t wait for warning signs to become something serious. When you contact BW Henderson, you speak directly with a qualified electrician who can assess your situation and coordinate an appropriate response.
Give us a call – one of our experienced electricians can advise and book a time to come to you.
The warning signs, in order of how worried you should be
Not every quirk is an emergency, but some are. Roughly in order:
- Stop using it now. A burning or acrid smell with no obvious source. Smoke or scorch marks. An outlet or switch plate that is hot or discoloured. A shock or tingle from a switch, appliance or tap. Sparking when you plug something in.
- Get it looked at this week. A breaker that trips repeatedly, especially the same one. Buzzing or crackling from the switchboard, a socket or a light fitting. Lights that dim noticeably when the jug or the dryer starts. Sockets that no longer grip a plug.
- Put it on the list. Ceramic fuses instead of circuit breakers. No RCD protection. Two-pin sockets. Outdoor fittings that have gone brittle or corroded. An extension lead doing a permanent job.
The pattern worth noticing is that most serious faults announce themselves for weeks before they cause damage. The customers who get hurt are rarely the ones who had no warning — they’re the ones who had warnings and got used to them.
What to do while you wait for an electrician
If you can smell burning or see smoke, switch off the affected circuit at the switchboard and leave it off. If you can’t work out which circuit it is, turn off the main switch. Unplug what you can reach safely, but don’t touch anything that is hot, wet or damaged, and don’t pull a plug that is arcing — kill the circuit first.
If someone has had a shock, don’t touch them until the power is off. Once it’s safe, get medical advice even if they seem fine — an electric shock can cause problems that show up later. Then leave that circuit isolated until it’s been checked. A shock means current found a path it shouldn’t have, and that path is still there.
What not to do: don’t reset a breaker repeatedly to see if it holds, don’t replace a fuse with a higher-rated one, and don’t open the switchboard. Those three account for a lot of the damage we’re called out to fix.
Why older South Auckland homes trip more
A lot of housing across Papakura, Takanini, Manurewa and Papatoetoe was wired for a household that owned a fraction of what a household owns now. Two or three circuits covering the whole house was normal. Add a heat pump, a dishwasher, a dryer, an EV charger and a home office to that, and the circuits aren’t faulty — they’re simply carrying more than they were designed for.
That’s why nuisance tripping is so often a sizing problem rather than a fault, and why adding more power boards makes it worse rather than better. A switchboard upgrade resolves it properly: modern breakers, RCD protection on the circuits that need it, and enough capacity for what the house actually runs.
Test your RCD every few months using the button on the board. If it doesn’t trip, it isn’t doing anything.
Rodents, water and the faults you can’t see
Two things cause a surprising share of the callouts we attend. The first is rodents: rats and mice chew cable insulation in ceiling and subfloor spaces, and the fault they create is invisible until it trips something or starts smouldering. The second is water — a leaking roof, a blocked gutter or a failed seal on an outdoor fitting finding its way into a junction box or down a conduit.
Neither shows up in the part of the house you look at. Both are common reasons a circuit starts tripping for no apparent reason after heavy rain or over a cold snap.
Getting the whole installation checked
If several of the signs above sound familiar, checking one fault at a time is the expensive way to do it. An Electrical Warrant of Fitness tests the whole installation — switchboard, circuits, RCDs, earthing, outlets and fittings — and gives you a written record of what’s sound and what needs work, so you can plan it rather than react to it.
If something looks or smells wrong right now, isolate the circuit and call BW Henderson. You’ll speak to a qualified electrician who can tell you whether it can wait.