Understanding Switchboards: Age, Safety, and When to Upgrade

If your switchboard still has ceramic fuses, no RCDs, or hasn’t been touched in 30+ years, it’s due for an upgrade. In South Auckland’s older housing stock that’s most boards - here’s how to tell what you’ve got, and what to do about it.

What to look for

• Ceramic fuse holders - these are old and need replacing. They’re identifiable by the screw-in porcelain fuse elements. When they blow, you replace the fuse wire, which means most people just put in thicker wire. That’s a fire risk.
• No RCDs - RCDs (residual current devices) are the safety switches that save lives. If your board doesn’t have any, this is the most important upgrade you can make.
• 30-amp main fuse but no circuit breakers - common in state housing from the 1960s. The protection isn’t granular enough for modern loads.
• Discolouration or burn marks - if you see any scorching inside the board, call an electrician today.

When to upgrade

If your board has ceramic fuses, no RCDs, or is more than 30 years old without a recent service, talk to us. A modern board with proper circuit breakers and RCDs is safer, more reliable, and required for some home insurance policies.

We’ll quote the job honestly. Switchboard upgrades for a typical South Auckland home run $2,000-$3,200 depending on circuit count, the age of the wiring, and whether the meter board needs work too. Older state housing in Manurewa or Ōtara usually lands at the higher end; a 1990s-2000s board that just needs RCDs added sits closer to the lower end. Full breakdown in our cost guide.