The Dangers of Old Service Fuses and VIR Cabling: A Real-Life Incident and How Modern Safety Switches Save Lives

Introduction

Electrical safety in our homes is paramount. Unfortunately, outdated electrical systems still exist in many houses, posing serious risks. In this blog post, we want to share a recent incident that highlights the dangers of old service fuses and VIR (Vulcanized India Rubber) cabling. This real-life example shows how modern RCBO (Residual Current Circuit Breaker with Overcurrent protection) safety switches can make a significant difference in preventing accidents.

A Close Call in Grenfell

Recently, our team at Zac Power was called to a property in Grenfell to complete electrical disconnections prior to a reroofing job following a major storm. During our inspection, we discovered that the switchboard was outdated, containing asbestos and old porcelain fuses. Recognizing the potential hazards, we recommended an upgrade to the homeowners, who agreed to proceed.

The Incident

The very next day, as the re-roofing work continued, a sheet of old tin roofing was removed, disturbing some bare VIR cabling that had been run on top of the roof battens. This live cabling, left over from a previous electrician’s failed attempt to rewire the house, posed an immediate danger. Fortunately, the RCBO safety switch we had installed the day before tripped instantly, preventing what could have been a severe injury or even death for the roofer.

Understanding the Risks

Old Service Fuses vs. Modern RCBO Safety Switches

Old Service Fuses:
- Limited Protection: Traditional porcelain fuses provide basic overcurrent protection but do not offer the advanced safety features of modern devices.
- Risk of Fire: Old fuses can overheat and increase the risk of electrical fires, especially in systems with outdated wiring.
- Manual Replacement: When a fuse blows, it requires manual replacement, which can be inconvenient and unsafe if not done correctly.

Modern RCBO Safety Switches:
- Advanced Protection: RCBOs combine the functions of a circuit breaker and a residual current device, offering protection against both overcurrent and earth faults.
- Automatic Tripping: RCBOs trip automatically in case of a fault, cutting off the electricity supply and preventing potential hazards.
- Enhanced Safety: By detecting small leakage currents, RCBOs can prevent electric shocks, making them a crucial component in modern electrical systems.

The Dangers of VIR Cabling

Age and Degradation: VIR cabling, commonly used in the early to mid-20th century, deteriorates over time. The rubber insulation can become brittle, crack, and expose live wires.
Fire Hazard: Deteriorated VIR cables are a significant fire risk, especially when combined with other outdated electrical components.
Inadequate for Modern Loads: VIR cabling was not designed to handle the electrical loads of modern appliances and systems, leading to potential overloading and overheating.

Ensuring Electrical Safety

The Grenfell incident underscores the importance of regular electrical inspections and upgrades. Here are some key takeaways for homeowners:

Regular Inspections: Have your electrical system inspected by a licensed electrician, especially if your home is older.
Upgrade Outdated Systems: Replace old service fuses and VIR cabling with modern RCBO safety switches and appropriate wiring.
Stay Informed: Be aware of the signs of electrical issues, such as frequent tripping of breakers, flickering lights, or unusual odors from electrical outlets.

Conclusion

Electrical safety is not something to take lightly. The swift action of our team at Zac Power in Grenfell highlights how modern safety devices like RCBO switches can prevent accidents and save lives. If your home still has outdated electrical components, consider an upgrade to ensure the safety of your family and property. Contact us today for a comprehensive electrical inspection and upgrade recommendations.

Stay safe, stay protected, and let Zac Power keep your home’s electrical system up to date!