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Call out fee
R650 – R950
Emergency fee
R600 – R900+
Labour
R400 – R800 per hour
After hours
1.5× – 2× normal rate
Comprehensive Cost Guide
*Prices are estimates and can vary

Electrical Design and Wiring for Your Home in South Africa

Written with insights from Kandua’s community of vetted master electricians.

Embarking on a new build, home addition, or major renovation in South Africa is an exciting journey. While you're busy choosing finishes and paint colours, the electrical design and wiring form the invisible backbone of your home. This system dictates its safety, functionality, and readiness for a future with load shedding and evolving technology.

Getting it right isn't just about convenience; it's a legal requirement. A professional electrical project, from design to the final Certificate of Compliance (CoC), must be done by a qualified electrician. Costs can range from R15,000 for a simple room addition to over R100,000 for a full home rewire with smart features and solar readiness.

Why a Professional Electrical Blueprint is Non-Negotiable

A professional electrical design is the master plan for your home's power. Without it, you risk everything from overloaded circuits to severe safety hazards.

"We often see new extensions where the existing distribution board (DB board) can't handle the extra load," explains Simon Pieterse, a Kandua Pro from Pretoria. "This leads to constant tripping and a costly fix that requires reopening walls. Proper planning from the start avoids this."

A comprehensive design considers:

  • Load Calculations: Ensuring your system can handle all your appliances, especially high-demand items like geysers, stoves, and air conditioners.
  • Safety Compliance: Adhering strictly to the South African National Standard SANS 10142-1, the legal code governing all electrical work in the country. This is not optional; it's the law.
  • Future-Proofing: Planning for future needs like a solar installation, an electric vehicle charger, or a home office with heavy power requirements.

High-quality wiring is the next crucial step. It involves using correct cable sizes, proper insulation, and secure connections that will last for decades.

The Electrical Design and Wiring Process: What a Pro Does

A qualified electrician follows a meticulous, regulated process to ensure your system is safe, efficient, and compliant.

  1. Initial Consultation and Design: The electrician reviews your architectural drawings and discusses your needs, from kitchen appliances to outdoor lighting. They perform a critical load calculation to determine the total power required and design the circuit layout. This includes dedicated circuits for heavy appliances to prevent overloads.
  2. First Fix (Pre-Plastering): Once the building frame is up, the electrician installs all concealed elements. They run conduits and cabling through wall cavities and ceilings and fit the back boxes for all switches and plug points.
  3. Second Fix (Post-Plastering): After the walls are plastered and painted, the electrician returns to connect the visible components: light switches, plug sockets, light fittings, and the DB board. They install the correct circuit breakers and safety devices like earth leakage units.
  4. Testing and Certificate of Compliance (CoC): This is the final and most critical step. The electrician performs rigorous tests to check for continuity, insulation resistance, and proper earthing. Once they confirm the installation is 100% safe and compliant with SANS 10142-1, they issue an Electrical Certificate of Compliance (CoC). This legal document, issued by an electrician registered with the Department of Employment and Labour, is your proof of a safe and legal installation.

The High Cost of Cutting Corners

A DIY or uncertified electrical job might seem cheaper initially, but the long-term risks are immense.

  • Serious Safety Hazards: Incorrect wiring is a leading cause of electrical fires and shocks in South African homes. Without proper earthing, a simple faulty appliance can become lethal.
  • Costly Rework: "Thandi in Sandton saved R5,000 in potential repairs when her Kandua electrician spotted that the wiring for her new home office wasn't on its own dedicated circuit," shares Jabu Nkosi. "A handyman had quoted her less, but he would have connected her powerful computers and printer to the main lighting circuit. It would have tripped constantly, and fixing it later would have meant chasing into freshly painted walls."
  • Legal and Financial Trouble: Without a valid CoC, your home insurance may be voided. If a fire occurs due to faulty wiring, your claim will likely be denied. You also cannot legally sell your property in South Africa without a valid and current CoC.

Checklist: Before Your Electrician Arrives

To ensure a smooth and efficient process, have the following ready:

  • A clear list of all planned appliances, especially high-power ones (oven, geyser, pool pump).
  • Your architectural plans or a sketch of the room layout.
  • A rough idea of where you want light switches and plug sockets. Don’t forget outdoor and utility areas.
  • Decide on any special features, like dimmer switches, USB outlets, or dedicated circuits for a generator or inverter.
  • Ensure the work area is clear of furniture and other obstructions.

Post-Installation: Caring for Your New System

Once the CoC is in your hands, maintaining your new system is straightforward.

  • Know Your DB Board: Your electrician will label the new circuits. Take a photo of the labelled board so you know which breaker to check if something trips.
  • Avoid Overloading Circuits: Don’t rely on multiplugs and extension cords for permanent setups. If you need more outlets, it's safer to have an electrician install them.
  • Install Surge Protection: In lightning-prone areas like Gauteng and the Highveld, a surge protector installed at the DB board can save your expensive electronics from damage during storms.
  • Schedule Periodic Inspections: Have a qualified electrician inspect your installation every few years to check for any potential issues and ensure it remains compliant.

Frequently Asked Questions (FAQs)

Q: What is an Electrical Certificate of Compliance (CoC) and why is it so important?

A: A CoC is a legal document proving your electrical installation is safe and complies with South African law (SANS 10142-1). You need it for insurance purposes and to legally sell your home.

Q: How do I know if an electrician is qualified in South Africa?

A: Ask to see their Wireman's Licence and confirm they are registered with the Department of Labour. A legitimate professional will always be able to issue a valid CoC for their own work.

Q: Can I do some of the electrical work myself to save money?

A: No. In South Africa, any significant electrical work must be performed and signed off by a qualified electrician. An electrician cannot legally issue a CoC for work they did not perform or directly supervise.

Q: How much does a new DB board installation cost?

A: A new DB board typically costs between R3,500 and R9,000 in South Africa. The final price depends on the board's size and the complexity of the installation. For a detailed breakdown, see our electrician cost guide.

Q: What are the signs that my older house needs a complete rewire?

A: Key signs include frequently tripping breakers, flickering lights, discoloured sockets, a burning smell, or visible old, fabric-covered wiring. If your home is over 30 years old with its original wiring, an inspection is highly recommended.

Q: How can I future-proof the electricity in my new extension?

A: Ask your electrician to install extra plug points and consider dedicated circuits for a home office or potential solar/inverter integration. Running data cables alongside electrical wires is also a smart move for future smart-home features.

Q: What is the difference between a "first fix" and "second fix"?

A: The "first fix" is the concealed wiring work done before plastering. The "second fix" happens after decorating and involves connecting the visible components like switches, sockets, and light fittings.

Why you can trust Kandua to get it right:

At Kandua, getting your home projects done is simple, safe, and stress-free.

  • Tell us what you need – Or let our smart AI Home Companion help diagnose your problem if you’re not sure where to start.
  • Get answers as you go – While posting your job, you can ask our smart AI home companion anything. From understanding typical costs, to how the process works, to how long it might take. Ask questions whenever they pop up, and get clear, helpful answers instantly.
  • We match you with the best – All our pros are 100% vetted: ID-verified, criminal background checked, certification verified, and maintaining at least a 4.5-star rating. You don’t have to worry about picking the right person. We make sure the pro we send has the right skills and certification to get your job done right.

With Kandua, you can rest easy knowing you’re in safe hands from the first click to the final handshake.

Electricians in South Africa: what to know before you book

Electrical issues have a way of starting small… and turning serious fast. A plug that “sometimes trips” can become a melted socket. Flickering lights can point to loose connections. And if your earth leakage keeps going off, it’s often your home telling you something isn’t right.

Kandua helps you get it sorted by matching you with a vetted electrician for your job — whether it’s a repair, installation, inspection, upgrade, or an urgent call-out.

A few quick answers (so you don’t have to scroll)

How do I choose a good electrician?
Pick someone who explains the cause (not just the symptom), tests before they replace parts, prices transparently, and can issue the right compliance paperwork when it’s required.

Do I need an Electrical Certificate of Compliance (CoC) in South Africa?
Often, yes — especially for property transfer and for any additions/alterations to an installation. The Department of Employment and Labour has also warned against “paper CoCs” issued without proper testing, and urges homeowners to use legally registered electrical contractors.

What should electrical work cost?
Most electricians charge a call-out fee + labour + materials, with higher rates for after-hours, complex fault finding, DB work, or urgent callouts. (There’s a pricing guide further down.)

What should I do first in an electrical emergency?
If it’s safe, switch off power at the main breaker, keep people away from the affected area (especially if there’s water), and call an electrician. If there’s smoke/fire risk, treat it as an emergency immediately.

Common electrical problems (and what they usually mean)

You don’t need to diagnose like an electrician — but it helps to know what the usual “signals” point to.

“My plugs keep tripping / the power keeps going off”
Often caused by an overloaded circuit, a faulty appliance, a loose connection, or a problem at the DB (distribution board). If it’s frequent, don’t just keep resetting — you want proper testing to prevent heat build-up and damage.

“My earth leakage trips randomly (especially at night or when it rains)”
This can indicate moisture ingress, a faulty appliance, deteriorating insulation, outdoor circuits taking on water, or an earthing/bonding issue. It’s common — and it’s exactly the sort of thing that needs systematic fault finding.

“My lights flicker / dim when I use appliances”
Sometimes it’s a supply issue — but it can also point to loose connections, voltage drop, an overloaded circuit, or a stressed neutral. If you’re noticing it across multiple rooms, get it checked.

“I smell burning / a plug is warm / there’s buzzing at the DB”
Treat this as urgent. Heat + electrics is how small problems become big ones. Switch off the circuit (or main breaker if you’re unsure) and book an electrician.

“I get a small shock/tingle from taps or appliances”
That can be an earthing/bonding fault and should be investigated quickly — especially in kitchens, bathrooms, and anywhere near water.

When it’s a DIY job — and when it isn’t

DIY can be fine for low-risk, non-electrical basics (like replacing a light bulb, resetting a tripped breaker once, or unplugging an appliance to test if it’s the cause).

Call an electrician when:

  • a socket/switch is hot, crackling, discoloured, or smells burnt
  • breakers/earth leakage keep tripping
  • you suspect faulty wiring, water exposure, or a hidden issue
  • you’re touching the DB, adding circuits, or upgrading capacity
  • you’re installing high-load appliances (oven, hob, geyser, heat pump) or adding dedicated circuits
  • you’re adding solar/inverter equipment or changing the installation layout
  • you may need a CoC for compliance, insurance, or sale/transfer

Certifications, registrations & compliance in South Africa (what matters and when)

This is the part people usually discover too late. Here’s the simple version.

1) Electrical CoC (Certificate of Compliance)

A CoC is a legal document confirming an electrical installation has been inspected and tested and is compliant. It’s commonly required before property sale/transfer, and it’s also required when electrical work involves additions or alterations.

Also important: the Department of Employment and Labour explicitly warns that a registered contractor may only issue a CoC after proper inspection/testing, and may not issue on behalf of an unregistered person.

2) “Registered person” (who is actually allowed to certify)

In practice, certification is tied to being a properly registered/authorised person (often referred to as a wireman’s licence / registered person in the industry). If you need a CoC, ask upfront:
“Are you legally registered to inspect, test, and issue the CoC for this work?”

3) CoC validity (the part everyone argues about)

A useful way to think about it:

  • For transfer purposes, the regulations are commonly applied as “not older than 2 years”.
  • For day-to-day living, it remains relevant until changes are made — if you alter/add to the installation, you’ll typically need a supplementary CoC for that work.

4) Solar / inverter / PV additions (very common now)

If you’re adding solar PV or inverter equipment, treat it as a compliance-sensitive electrical project. Industry guidance stresses that PV work should be under the supervision of properly qualified electrical persons, and the City of Cape Town’s guidance notes you should request the original electrical CoC from the registered installation electrician.

Pricing: what to budget for an electrician in South Africa

Pricing varies by city, travel distance, urgency, and complexity — but most homeowners will see a familiar structure:

Typical cost structure

  • Call-out fee (travel + initial assessment)
  • Labour (hourly)
  • Materials/parts
  • After-hours premium (nights, weekends, public holidays)
  • Specialist testing / fault finding time (often where the real value is)

Typical ranges you’ll see (guideline)

  • Labour: roughly R350 – R700/hour for many standard jobs (average often around the mid-range), with higher rates for specialised work.
  • Emergency call-out: often around R600 – R900 (and may or may not include the first hour — always ask).

A realistic “small job” expectation
Even when it sounds simple, budget for a call-out + 1–2 hours labour plus parts. If you have a few small fixes, bundling them into one visit often saves money.

10 Genuinely helpful electrician FAQ's

  1. What’s the difference between “the power tripped” and “earth leakage tripped”?
    A normal breaker trip usually points to overload or a circuit fault. Earth leakage trips when it detects current leaking to earth (often moisture, insulation breakdown, or a faulty appliance). If earth leakage trips repeatedly, it needs proper fault finding.
  2. How do I figure out if it’s my appliance or the house wiring?
    A safe starting point is to unplug high-load appliances and see if the trip stops — but if trips continue (or you see heat/burning smells), stop testing and get an electrician. The correct method is measured testing, not guesswork.
  3. Why does my plug socket feel warm?
    Warmth can mean a loose connection, overload, poor contact, or damaged wiring — all of which can create heat and become dangerous. Book it in sooner rather than later.
  4. My lights flicker when I use the kettle/microwave — is that normal?
    Occasional minor dimming can happen, but persistent flickering/dimming can signal voltage drop, loose connections, overloaded circuits, or neutral issues. If it’s happening across rooms, get it checked.
  5. Do I need a dedicated circuit for an oven/hob/geyser/heat pump?
    Very often, yes — these are high-load items and are safer (and usually more reliable) with correct isolation and wiring sized for the load. An electrician should assess and advise based on your DB capacity.
  6. What’s involved in a DB (distribution board) upgrade?
    Typically: inspection of existing circuits, correcting unsafe/incorrect connections, adding/replacing breakers, ensuring earthing and bonding are correct, labelling circuits, and testing. DB work should be done carefully and properly documented.
  7. Do I need a new CoC after renovations?
    If the renovation involved electrical additions/alterations (new circuits, moved points, new DB work, solar/inverter additions), you’ll usually need a supplementary CoC for that work.
  8. How long does a CoC take to issue?
    It depends on how many defects are found. A proper CoC requires inspection and testing — if repairs are needed, it may take longer. Be wary of instant “paper CoCs” with no testing.
  9. Does an electrical CoC cover everything in the house?
    A CoC generally relates to the electrical installation and its safety/compliance (distribution, wiring, earthing, bonding, etc.). If you have specialised systems (like solar PV or an electric fence), ask what additional documentation is required for those.
  10. What should I ask an electrician before they start?
    Three questions cover most issues:
  • “What do you think is the likely cause, and how will you test it?”
  • “Is this priced as call-out + hourly + materials, and what counts as after-hours?”
  • “Will this work require a CoC or supplementary CoC — and are you registered to issue it?”
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