Understanding VIR Wiring and Why It Should Be Replaced

What Is VIR Wiring?

VIR stands for Vulcanised Indian Rubber; a type of electrical insulation used in older buildings from the early to mid-20th century. These wires consist of copper conductors insulated with a layer of rubber and covered with cotton or braided cloth. While VIR wiring was once considered durable and reliable, it is now obsolete and unsafe according to modern electrical standards such as SANS 10142-1 (The Wiring of Premises).

Why VIR Wiring Is Dangerous

Over time, the rubber insulation in VIR cables deteriorates due to heat, moisture, and age, leading to cracks and brittleness. When the insulation fails, live wires become exposed, increasing the risk of:

• Electrical shocks

• Short circuits

• Electrical fires

• Tripping of circuit breakers

  
  

Many homeowners are unaware that their properties may still contain old VIR wiring hidden behind walls or ceilings. This outdated wiring cannot safely handle modern electrical loads from today’s appliances and systems.

SANS 10142-1: Compliance and Safety Requirements

The South African National Standard (SANS 10142-1) sets the regulations for the safe installation and maintenance of electrical systems in South Africa. According to this standard:

• All electrical wiring must be insulated with approved materials that meet current safety codes.

• Obsolete wiring types, such as VIR, are non-compliant and must be replaced to ensure safety and obtain a valid Certificate of Compliance (CoC).

• Electrical work must be carried out by a registered and qualified electrician, ensuring that all installations meet SANS 10142-1 specifications.

  
  

The Importance of Using a Registered and Qualified Electrician

Only a registered electrical contractor is legally permitted to replace old wiring and issue a Certificate of Compliance. Hiring a qualified professional ensures that:

1. All installations meet SANS 10142-1 standards.

2. The correct wire sizes, protection devices, and circuit configurations are used.

3. Proper testing and inspection are conducted before energizing the circuits.

4. You receive a valid CoC, which is essential for property sales, insurance, and safety compliance.

   
   

Attempting DIY electrical work or using an unqualified person can be extremely dangerous and is prohibited by South African law.

How to Know If You Still Have VIR Wiring

Signs that your property may still have VIR wiring include:

• Cotton or cloth-covered wires in your distribution board or ceiling.

• Brittle, cracked, or blackened insulation.

• Old porcelain fuse boards or rewireable fuses.

• Frequent tripping or flickering lights.

If you suspect that your property contains old wiring, contact a registered electrician immediately to perform an inspection and provide a replacement plan.

Upgrade to Modern, Safe Wiring Today

Replacing VIR wiring with modern PVC cabling not only ensures compliance with SANS 10142-1, but also enhances the safety and efficiency of your electrical system.

At Rosen Electrical, our qualified and registered electricians are experienced in identifying and safely replacing outdated VIR installations. We ensure your property meets the latest compliance standards and provide you with a valid Certificate of Compliance (CoC) upon completion.

Old VIR wiring poses a serious fire and safety risk. Don’t wait for an electrical failure to act. Contact Rosen Electrical today for a professional inspection and replacement service that complies with SANS 10142-1.