Why Your Office Microwave Needs More Than a Tag

Your office microwave should have a radiation leakage test as well as the usual electrical safety tag. The tag only shows that the power lead and casing are safe, but it does not check if the door seal is letting microwave radiation escape. Because of this, microwaves are often missed on test and tag schedules.

Key takeaways

  • ARPANSA sets a leakage limit of 5 mW/cm², measured 5cm from the surface, under AS/NZS 60335.2.25
  • Door seal wear, not electrical faults, is the main reason microwaves start to leak
  • Hinges, latch wear and food residue on the seal are the usual culprits
  • This is a measurable, government-backed safety standard, not an overcautious add-on

Why you can't treat your microwave like a kettle

A kettle, toaster, or fan only needs an electrical safety check, which includes earth continuity, insulation resistance, and a visual check of the cord and casing. A microwave needs these checks too, but it also has another important job: keeping microwave radiation inside its cooking area.

The Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) checks this risk in both home and workplace products. Every microwave is tested for leakage before it is sold. The limit is set at 5 mW/cm², measured at least 5cm from the surface, according to AS/NZS 60335.2.25.

This limit is set for a reason. A microwave that works properly is safe, but if the seal is worn or damaged, it can leak above the limit without any clear signs. There is no smell, sound, or visible problem, so just looking at it is not enough to know it is safe.

What's quietly wearing out your door seal

A microwave can start leaking when the door seal no longer closes tightly against the body. This can happen for several reasons, and it is common in busy staff kitchens.

  • Hinge wear: repeated opening and closing eventually loosens the hinge, letting the door sit slightly off-square even when it looks shut properly
  • Latch wear: the same applies to the latch mechanism, which can wear down enough that the door clicks shut without fully engaging
  • Food residue on the seal: spilled soup, splattered sauce and general grime build up along the seal line, preventing it from making full contact with the cavity edge

These problems do not stop the microwave from working. It will still heat food, so staff often keep using it even after the seal starts to fail. The microwave does not give any warning when it becomes unsafe, which is why a proper test is needed instead of just checking the door.

Leave this one to a professional

A test and tag technician checks both the usual electrical safety items and also measures radiation leakage with a special meter at the seal, hinge, and window. This is the only reliable way to know if your microwave meets the ARPANSA limit.

It is best to include this check in your regular test and tag schedule, not as a separate job. If you already have a technician check your other office equipment, make sure the microwave is on that list. It should be checked every year, or sooner if the door looks damaged.

At Test and Tag Sydney Wide, we always include a leakage check when we test a microwave, along with the usual electrical safety inspection. This is not an extra service or an upsell. It is part of every microwave test we do.

Get your microwave booked in today

Do not wait for a damaged door or worn seal to make your microwave a compliance risk. Test and Tag Sydney Wide can check your office microwave for both electrical safety and radiation leakage in one visit, and provide a full report and tag right away.

Book a microwave test for your Sydney workplace today, or call 0491 726 810 to add it to your next scheduled visit.