Many Australian business owners — even those who are already having electrical safety compliance done — assume that test and tag and RCD testing are the same service, or that having one means you’ve covered both. This is a very common and potentially costly misunderstanding.
They are two entirely separate, complementary services. You need both. Here’s a clear explanation of what each one is, what it protects against, and why both are required for a fully compliant Australian workplace.
What Is Test and Tag?
Test and tag is the inspection and electrical testing of portable electrical appliances — any device connected to the mains supply via a plug and socket that is used in the workplace.
The process involves two stages:
1. Visual inspection Before any electrical testing, a technician conducts a thorough visual inspection of the appliance, checking for:
- Damage to the flexible supply cord (cuts, fraying, kinking)
- Damage to the plug (bent pins, cracked casing, burn marks)
- Damage to the appliance body (cracking, burns, missing covers)
- Any signs of modification or unusual wear
2. Electrical testing The technician then uses a Portable Appliance Tester (PAT) to conduct the required electrical tests under AS/NZS 3760:2022:
- Insulation resistance test — checks that the electrical insulation inside the appliance is intact and not allowing current to leak
- Earth continuity test — verifies that the protective earth connection is intact (for Class I appliances)
- Leakage current test — measures any current flowing to earth during normal operation
- Polarity check — confirms the appliance is wired correctly
If the appliance passes all tests, a tag is applied recording the test date, result, technician and next retest date. If it fails, it is removed from service.
What test and tag protects against: A faulty appliance — one with damaged insulation, a broken earth, or a wiring fault — that could cause electric shock or fire when plugged in and used.
Governed by: AS/NZS 3760:2022
What Is RCD Testing?
RCD testing is the inspection, testing and tagging of Residual Current Devices (RCDs) — also known as safety switches or ELCBs (Earth Leakage Circuit Breakers).
An RCD is a life-saving device installed in your switchboard or power points, or used as a portable device with individual tools and appliances. Its job is to detect dangerous electrical faults — particularly those associated with electric shock — and cut the power within milliseconds (typically 300ms or less).
RCD testing involves:
1. Push button trip test The RCD is manually tripped using its test button to confirm it physically trips as designed.
2. Operating time test Using an RCD tester, the device is tested to confirm it disconnects power within the required timeframe. An RCD that trips, but takes too long, may not prevent electrocution.
3. Visual inspection The RCD is checked for physical damage, correct installation and proper labelling.
4. Tag application and documentation A compliant tag is applied and all results are documented.
What RCD testing protects against: An RCD that fails silently over time — one that appears fine but would not actually trip fast enough (or at all) in the event of an electrical fault. An untested RCD provides a false sense of security.
Governed by: AS/NZS 3760:2022 (same standard) and state WHS legislation
The Key Difference — What Each Protects
| Test and Tag | RCD Testing | |
| What is tested? | Portable electrical appliances (tools, leads, chargers, kettles etc.) | Safety switches / RCDs (in switchboards, powerpoints, or portable) |
| What does it find? | Faults inside the appliance — damaged insulation, broken earth, wiring faults | RCDs that have failed or degraded and would not respond fast enough in an emergency |
| What does it prevent? | Electric shock or fire from a faulty appliance | Electrocution from a fault that the appliance test didn’t catch, or from a fault in fixed wiring |
| Australian Standard | AS/NZS 3760:2022 | AS/NZS 3760:2022 |
| How often? | 3–12 months depending on environment | 3–12 months depending on environment |
| Is it mandatory? | Yes, in hostile environments. Risk assessment required in others. | Yes, in hostile environments. Risk assessment required in others. |
Why You Need Both — They Work as a Safety Net
Think of it this way:
- Test and tag checks whether the appliance itself is safe to use — it looks for faults that exist within the appliance before it is used.
- RCD testing is the last line of defence — if something goes wrong during use (a fault develops mid-task, a lead is damaged by a tool, someone makes contact with a live part), the RCD is what stands between the worker and electrocution.
If your appliances are tested and tagged but your RCDs have never been checked, you have a false sense of security — an untested RCD may have silently failed and would not respond in an emergency.
If your RCDs are tested but your appliances aren’t, you may be running faulty equipment that could cause a fire or shock before the RCD even has a chance to trip.
The two services work together as complementary layers of electrical safety protection. Both are required under the Harmonised WHS Regulations for hostile environments, and both are considered best practice for all Australian workplaces.
How Often Does Each Need to Be Done?
Testing frequency is the same standard (AS/NZS 3760:2022) for both services and depends on the workplace environment:
| Environment | Test and Tag | RCD Testing |
| Construction sites | Every 3 months | Portable RCDs: monthly. Fixed RCDs: every 3 months |
| Manufacturing / industrial | Every 6 months | Every 6 months |
| Commercial kitchens / hospitality | Every 6 months | Every 6 months |
| Offices and low-risk | Every 12 months | Every 12 months |
Can ATS Do Both in One Visit?
Yes. ATS provides both test and tag and RCD testing services nationally, and in most cases can complete both services in a single site visit. This minimises disruption to your business and ensures your full electrical safety compliance is managed through one provider with one reporting system.
Call 1300 287 669 or get a free quote online to arrange both services for your workplace.