Look with the door open. Don't touch anything inside
Everything behind a cover inside the meter box is licensed work. If the board behind the fuses is black or dark brown, leave it alone: bituminous backing boards made before 1987 can contain asbestos, and drilling or breaking one is how fibres get into the air.
What it asks you
First, what you can see: ceramic fuses that pull out, a row of switch-style circuit breakers, or a mix of both. Then whether any switch has a test button, which is how you spot a safety switch. NSW Fair Trading strongly recommends that homes built before 2000 have an electrician check for safety switches, so the age of the house is a question too.
After that, it asks about your plans and habits. An EV charger, solar, an induction cooktop or a renovation can each need a new circuit and spare space on the board. Regular trips when several heavy appliances run at once count as a sign as well.
What the result tells you, and what it doesn't
You'll get one of three answers: the board looks fine for now, it's worth an electrician's look before you add anything, or the signs are strong enough to book soon. It also suggests the right kind of specialist, such as someone who replaces old fuse boxes or sets boards up for solar and EV chargers.
It can't see behind the cover, measure what your supply can carry, or tell whether a backing board contains asbestos. Only an electrician on site can do that, and a clean result is no substitute for their check.
If it were our board
If the checker turns up ceramic fuses or no safety switches, we wouldn't wait for a trip or a scorch mark. Get it looked at before anything new goes in, and mention a dark backing board when you book.
Want a specialist to sort it?
Tell us the job and your postcode. We match the licence-checked local electrician who does this kind of work, and they call you. No ring-around, and your number goes to them alone.