What Cable Size Do You Need for a Stove in South Africa?
Why Stove Cable Size Matters
Stoves are one of the highest electrical loads in any South African household. Incorrect wiring can lead to tripped breakers, overheating, or even fire hazards. Choosing the right cable size is essential for safety, efficiency, and compliance with South Africa’s wiring code, SANS 10142.
Homeowners often ask: What size cable do I need for a stove? The answer depends on the stove’s rating, distance from the DB board, and the protection devices installed.
Typical Stove Cable Sizes in South Africa
While the exact choice must always be confirmed by a registered electrician, the following are commonly used:
-
4mm² Surfix – Suitable for smaller stoves or ovens with elements rated around 3–4kW.
-
6mm² Surfix – The standard size for most free-standing electric stoves (typically 5–6kW).
-
10mm² Surfix – Required for very large or commercial-grade stoves, or when the run from the DB board is unusually long.
Factors That Determine Stove Cable Size
1. Power Rating of the Stove
Domestic stoves are often rated between 4kW and 7kW. Larger appliances draw more current, which requires a thicker cable.
2. Distance from the DB Board
If the DB board is far from the stove location, voltage drop becomes a concern. Longer distances may require a larger cable size.
3. Breaker Size
The breaker must match both the load and the cable. Common setups include:
-
32A breaker with 6mm² cable for standard stoves
-
40A breaker with 10mm² cable for high-load or large installations
4. Installation Environment
Cables running through conduit, high-temperature areas, or cramped spaces may require upsizing to ensure safe current carrying.
5. SANS 10142 Compliance
Even if a cable seems to “work,” if it does not comply with the wiring code, the installation is illegal and unsafe.
Common Mistakes in Stove Installations
-
Using undersized cable such as 2.5mm² or 4mm² for a full-sized stove.
-
Forgetting to install a stove isolator switch within 1 metre of the appliance.
-
Running Surfix cable exposed outdoors instead of in conduit.
-
Incorrect breaker sizing, leading to nuisance tripping or dangerous overloading.
-
Attempting a DIY installation without a Certificate of Compliance.
FAQs
What is the standard cable size for a stove in South Africa?
Most free-standing stoves require 6mm² Surfix with a 32A breaker.
Can I use 4mm² cable for a stove?
Only for smaller ovens or low-rated appliances. Most stoves need 6mm².
Do I need a stove isolator switch?
Yes. A stove isolator within 1 metre is required by SANS regulations.
What breaker size should be used for a stove?
A 32A breaker is standard for most stoves, but some larger units may require 40A.
Can I wire a stove with cabtyre?
No. Cabtyre is for portable appliances. Stoves require fixed wiring with Surfix cable.
Stove Wiring Products at Lite-Glo
Lite-Glo supplies Surfix cable in 4mm², 6mm², and 10mm² sizes, along with stove isolators, breakers, and conduit. Whether you’re wiring a new home or upgrading an old installation, we stock the products you need for safe, compliant installations.
Shop Stove Isolators
Shop Surfix Cable – Per Meter
⚠️ Safety & Compliance Notice
All electrical installations in South Africa must comply with SANS 10142-1 (Wiring Code) and the Occupational Health & Safety Act. Work must be carried out by a qualified, registered electrician.
This article is for general educational purposes only. It does not replace professional advice, and Lite-Glo accepts no liability for how this information is used. Always obtain a valid Certificate of Compliance (CoC) for any electrical work.
Need Assistance?
📧 onlinesales@liteglo.co.za
📞 011 781 3100
💬 WhatsApp: 060 322 9674