Residual Current Devices (RCDs), also known as safety switches, protect people from electric shock by quickly cutting power when a fault is detected. But to do their job, they need to be tested regularly.
So, how often should a RCD be tested? This depends on where and how it’s used. Below, we explain the required testing intervals based on Australian safety standards and outline what you need to stay compliant.
What Is an RCD and Why It Matters
An RCD detects leakage currents and trips the power supply when an imbalance occurs—usually within 30 milliseconds. This rapid response prevents injury or death from electric shock.
RCDs are required in many Australian workplaces, particularly where portable tools or outdoor equipment are used. Over time, factors like moisture, dust, and general wear can affect their performance. That’s why regular testing is essential—not just for compliance, but for safety.
How Often Should an RCD Be Tested?
The frequency of RCD testing depends on the type of environment, equipment usage, and legal requirements under Australian Standards such as AS/NZS 3760:2022 and AS/NZS 3012. Below is a detailed breakdown of how often you should test RCDs in different settings:
| Environment / Use Case | Type of RCD | Push-Button Test | Instrument Test (Trip Time Test) |
| Office, Retail, Administration | Fixed RCD (in switchboard) | Every 6 months | Every 2 years |
| Classrooms, Aged Care, Libraries | Fixed RCD | Every 6 months | Every 2 years |
| Workshops, Labs (non-hostile environment) | Fixed or portable RCD | Every 6 months | Every 1 year |
| Extension Leads / Power Boards | Portable RCD (built-in) | Every month | Every 12 months |
| Mobile and Temporary Workplaces | Portable or inline RCD | Every month | Every 12 months |
| Construction, Demolition, or Mining Sites | Fixed or portable RCD | Daily / Before each use | Every 3 months |
| Event Setups / Outdoor Installations | Portable RCD | Every month | Every 12 months |
Who Can Test RCDs?
Only a competent person—someone with proper training and equipment—can carry out instrument RCD testing. This ensures accurate results and helps maintain compliance.
Most businesses choose professional services like Get Test and Tag to handle RCD testing, so everything is documented and up to standard.
What’s Involved in RCD Testing?
There are two types of tests:
- Push-button test: Checks basic function. Can be done by the user.
- Instrument test: Measures trip time using a calibrated tester. Must be done by a trained technician.
Test results should be recorded, and any RCDs that fail must be replaced or repaired immediately.
Why Compliance Matters
Not testing RCDs isn’t just a missed safety check—it’s a serious risk. When RCDs fail, the consequences can be immediate and severe:
- Electric shock injuries or fatalities due to delayed or failed power disconnection
- Fines and penalties from WHS regulators for non-compliance
- Insurance claim rejections if no testing records are available after an incident
- Project delays or contract breaches during audits or site inspections
Testing RCDs is a legal requirement under the WHS Act and Safe Work Australia guidelines. More importantly, it’s a key part of keeping people safe at work.
Stay Compliant with RCD Testing
To stay compliant:
- Know where your RCDs are—fixed or portable.
- Follow the correct testing intervals.
- Use qualified professionals for testing.
- Keep clear records.
- Act immediately if a unit fails.
If you’re unsure whether your business meets RCD testing requirements, reach out to Get Test and Tag. We provide reliable and compliant testing services across Sydney.
Conclusion
RCDs save lives—but only if they work when they’re supposed to. That’s why regular testing isn’t optional in high-risk environments and strongly recommended everywhere else.
If you’re in an office, test every 6 months to 2 years. For portable RCDs, test monthly and yearly. On construction sites, test daily and every 3 months.
The key is consistency. Following the correct schedule helps prevent accidents, avoid fines, and meet your duty of care.
Need help staying compliant? Get Test and Tag offers RCD testing services across Sydney to keep your workplace safe and up to standard.