Common Signs Your RCD Safety Switch May Be Failing
Residual Current Devices (RCDs), also known as safety switches, are vital components in any electrical system. Their main role is to prevent electrical shock and fire by disconnecting power when they detect leakage currents. But like any safety device, RCDs can wear out or become faulty over time.
At SafeTag, we specialize in electrical testing and safety services, helping you detect RCD failures before they become serious hazards. Here are the most common signs that your RCD safety switch may be failing—and why timely action is essential. To Know More Click Here
1. Frequent Tripping Without Clear Cause
One of the most noticeable signs of a failing RCD is frequent or random tripping, even when no obvious fault exists in your appliances or wiring. While RCDs are designed to trip during genuine faults, excessive or unexplained trips could indicate:
- Moisture buildup in outlets or wiring.
- Aging or deteriorated components within the RCD.
- Nuisance tripping due to sensitivity issues.
SafeTag’s professional testing can help determine if the RCD is still functioning properly or if it needs replacement.
2. RCD Does Not Trip During Test
Every RCD has a “Test” button that should be pressed regularly. If the RCD fails to trip when tested:
- It’s no longer providing the intended protection.
- There could be internal damage or worn-out mechanisms.
- Immediate replacement or inspection is necessary.
Regular testing by SafeTag ensures your RCD responds as it should in a real emergency. To Know More Click Here
3. Buzzing or Humming Sounds
If your RCD is emitting a buzzing or humming noise:
- It may signal overheating, loose wiring, or internal faults.
- These sounds can be early indicators of electrical arcing or failure.
- Left unchecked, they can lead to fire risks or complete system shutdowns.
Always take unusual noises seriously and call SafeTag for a full inspection.
4. RCD Fails to Trip During Faults
A critical red flag is when the RCD doesn’t trip during a known fault—such as a short circuit or electric shock event. This means:
- The safety function is compromised.
- Your system is no longer protected against life-threatening risks.
- Immediate action is essential.
SafeTag uses calibrated testing tools to ensure your RCD reacts accurately under real fault conditions. To Know More Click Here
5. Discoloration, Burn Marks, or Smell of Burning
Visible signs like:
- Burnt or melted casing.
- Discoloration around the switch.
- A smell of overheating or electrical burning.
All indicate serious internal damage or overloading. These are signs that your RCD may already be compromised and needs urgent professional attention.
6. RCD Is Over 10 Years Old
Even without symptoms, older RCDs can degrade with time. If your safety switch is over a decade old:
- It may not meet current safety standards.
- Its response time may be slower than required.
- It’s wise to have it tested or replaced proactively.
SafeTag can help you assess whether your older RCD still meets today’s safety expectations. To Know More Click Here
Conclusion: Don’t Wait for Failure—Test and Replace Early
RCDs are lifesaving devices, but they’re not immune to wear or failure. Frequent tripping, non-tripping, strange noises, and physical damage are all warning signs you shouldn’t ignore.
At SafeTag, we provide reliable RCD testing, fault identification, and replacement services that meet industry standards—keeping your premises compliant, safe, and risk-free.
SafeTag – Your Safety Partner in New Zealand
Ensure workplace safety and compliance with SafeTag’s professional testing services. We offer certified solutions for Electrical Testing & Tagging, RCD Testing, Microwave Leakage Testing, and Portable Appliance Testing (PAT). Trust our experts for hassle-free, on-site service tailored to your business needs.
