EV Charger Installation Requirements in South Africa

What homeowners and electricians need to check before a wallbox is connected

The short answer A wallbox that switches on and charges the car is not proof that the installation is safe or compliant. The circuit, cable, earthing, protective devices, isolation and supply capacity all have to suit the exact charger and property. The completed work must then be inspected, tested and covered by the appropriate Certificate of Compliance and test report.

An EV charger can draw a high current for several hours, often while the household is asleep. That makes it very different from a kettle or power tool that runs for a few minutes. A weak termination, undersized cable or unsuitable protective device may appear to work at first and only reveal itself after repeated heating cycles.

This guide is written for both sides of the quotation. It gives homeowners sensible questions to ask, and it gives electricians a practical starting point for a technology that is still new to many good tradespeople.

The cheapest quote can become the most expensive installation

The risk is not that every inexpensive installation is unsafe. A short, simple cable route can genuinely cost less. The problem starts when the low price comes from leaving out assessment, protection, testing or documentation that the job actually needs.

If something goes wrong, the cost is rarely limited to replacing the charger. Overheated conductors can damage a distribution board or building wiring. Incorrect fault protection can expose a person to electric shock. An overloaded supply can cause repeated trips or damage upstream equipment. A poorly integrated charger can also overload an inverter or defeat the reason for installing solar and backup power.

There is a financial risk as well. After a fire or electrical incident, an insurer may ask for the Certificate of Compliance, test results, invoices and equipment information. A missing document does not automatically decide every insurance claim, but it can make the cause, responsibility and validity of the work much harder to prove. The CoC is evidence that the fixed electrical work was inspected and tested; it is not paperwork to add after the job when somebody asks for it.

What the advertised from price may leave out

You may see social media adverts offering EV charger installation from R5,500 or R5,900. That starting price may be possible on a very simple site with a short cable run, suitable existing equipment and no remedial work. It does not tell you what the final installation will include. The word from is there to get the phone to ring, so the written scope matters far more than the headline price.

Be careful with the phrase dedicated charger circuit. An advert may use it to mean only that the charger has its own circuit-breaker and cable. It does not automatically mean that the price includes a separate EV distribution board where the existing board has no suitable space. It also does not confirm the correct RCD and DC fault-protection arrangement, suitable isolation, a surge-protection assessment or a properly calculated cable size.

For a complete installation, R5,500 is a difficult price to make work. The contractor still has to cover the site assessment, suitable protective equipment, cable and accessories, skilled labour, testing, certification and after-sales support. If all of that is said to be included, ask for it in writing. A low figure may be a genuine minimum for the easiest possible site, but it should never be used as a substitute for a proper design and an itemised quotation.

The workmanship warranty also deserves attention. Six months is a short commitment for a fixed electrical circuit that should serve for years. It does not prove that the work is defective, but it tells you how little time the contractor is prepared to stand behind the installation. Ask what is covered, what is excluded, who pays for the call-out and what support remains after month six.

A dealer supplied charger is still a site specific installation

The wallbox is only one part of the system. The vehicle dealer may supply a perfectly good charger, but the box cannot know the condition of the home's distribution board, the cable distance, the earthing arrangement, the available supply capacity or whether the charger will sit behind an inverter.

The installer must design the circuit around the site and the exact wallbox instructions. Two homes with the same charger may need different cable sizes, protection or load control. A generic installation kit cannot settle those questions on its own.

The South African legal position

South Africa's Electrical Installation Regulations require electrical installation work to be carried out under the general control of an appropriately registered person. Additions and alterations must be inspected, tested and certified through the prescribed Certificate of Compliance process.

SANS 10142-1 is the national wiring-code baseline. The 2026 edition identifies an EV charging station as a machine or appliance and points to the SANS 61851 and SANS 62196 product-standard families. It does not yet contain the same depth of EV-specific circuit design found in IEC 60364-7-722.

That does not remove the installer’s duty to design a safe circuit. It means the legal hierarchy needs to be applied with competent engineering judgement. Current South African requirements come first. IEC 60364-7-722 and the relevant IEC product standards provide an additional technical benchmark where the local wiring code is less specific. An IEC publication does not automatically override South African law, a municipal requirement or the manufacturer's instructions.

South Africa already adopts many IEC standards into the SANS system. It is reasonable to expect future local EV requirements to draw on the established IEC work, although nobody can promise the wording or timing of a future South African revision. Designing with that benchmark now is a practical way to avoid building an installation around yesterday's minimum.

What a proper site assessment should cover

A useful quotation begins at the distribution board, not at the wall where the charger will hang. Before selecting the protection or cable, the installer should establish the following:

• the supply type, phase arrangement and main-switch or service capacity
• the existing household demand and the spare capacity available for charging
• the condition and available space of the distribution board
• the earthing arrangement, protective-conductor path and relevant fault measurements
• the cable route, length, installation method, grouping, ambient temperature and exposure
• the charger model, maximum current, internal DC fault protection and manufacturer instructions
• any solar inverter, battery, generator, changeover or essential-load arrangement
• the mounting position, weather, sunlight, water, impact risk, cable reach and user access

A photograph and a guessed cable length can help with budgeting, but they do not replace the final site assessment and testing.

The charger needs a correctly designed circuit

Dedicated supply

Good installation practice is to provide a dedicated final circuit for each AC charging point. The charger should not share a circuit with garage sockets, a geyser or other general loads. Where several charging points share capacity, the diversity must come from a documented load-management system, not from hoping that the chargers will not run together.

Cable and overcurrent protection

Cable size is a calculation, not a rule of thumb based only on charger power. The installer must consider continuous current, cable length, voltage drop, installation method, grouping, temperature and fault-disconnection conditions. The circuit-breaker must protect the effective cable capacity and have a suitable breaking capacity for the measured or calculated prospective fault current.

A common 7.4 kW single-phase wallbox can draw about 32 A. Six square millimetre copper may be a sensible result on one straightforward route, but it is not a universal answer. A long run, roof space, hot environment, grouped circuits or another wiring method can change the result.

Residual current and DC fault protection

This is the point most likely to be oversimplified. An EV's onboard power electronics can place smooth DC residual current onto the AC charging circuit during certain faults. That DC can impair an unsuitable AC residual-current device. The device may still have a test button and look reassuring in the distribution board, but it may not provide the intended protection under the relevant fault condition.

A Type AC RCD should not be specified for a new Mode 3 charging circuit. A 30 mA Type A device is normally used only where the exact EVSE provides verified 6 mA DC residual-current detection and disconnection in accordance with IEC 62955, or an explicitly documented equivalent permitted by the manufacturer and applicable standard. Without acceptable evidence of that function, a Type B solution is normally required. The whole arrangement must follow the exact charger instructions.

The words ‘DC leakage detection’ in a brochure are not enough. The installer should verify the exact model's certificate, threshold, disconnection action and wiring instructions. Detection that only reports an alarm is not the same as protective disconnection.

Earthing isolation and surge protection

The protective-earth path must remain reliable, and the earthing system must be understood before choosing the residual-current and surge-protection arrangement. Grid, inverter, island and bypass operation can change how fault current returns. This is especially important where the charger is connected to a solar and battery installation.

Accessible isolation should disconnect the required live conductors and be suitable for isolation duty. A breaker with an OFF position should not be assumed to be an isolator unless its markings and documentation confirm that function.

A wallbox is outdoor electronic equipment in many homes. Coordinated Type 2 surge protection at the EV distribution board should be considered against the site risk, existing upstream protection, earthing topology and manufacturer requirements. Copying the same surge device and wiring arrangement into every property is not sound design.

The household supply must carry the load

A charger can run at high current for hours while the geyser, oven, pool pump and air conditioning are also operating. The installer must assess maximum demand and the supply limit before allowing the charger to run at full power.

If capacity is tight, reducing the charger's commissioned current or installing dynamic load management can be more sensible than paying for a supply upgrade. The load-management system must measure the right conductors and phases, have a defined response when communication fails, and never raise the charging current above the cable and protective-device design.

For a fuller explanation, see EV Charger Load Management Explained.

Solar inverter and backup systems need extra checks

A 7.4 kW charger connected behind a 5 kW inverter does not become a 5 kW load automatically. The installer must check the inverter's grid input, pass-through capacity, essential and non-essential topology, battery limits, changeover arrangement and earthing in every operating mode.

A high-power charger will often belong on the main or non-essential side unless the backup system was deliberately designed to carry it. Solar-surplus control and load management can manage energy flow, but they cannot correct undersized cable or unsuitable protection.

Read Can I Charge My EV From Solar for the energy-integration side of the design.

Testing and handover are part of the installation

The job is not complete when the car starts charging. The completed circuit must be inspected and tested before handover. The registered person remains responsible for deciding the applicable tests and recording the results, but the evidence should normally cover the supply and circuit characteristics, protective-conductor continuity, insulation resistance, polarity, fault conditions, residual-current operation and the charger's functional behaviour.

Where load management, solar control or another communications link affects safe current, commissioning should also prove what happens when a meter, CT, gateway or network connection fails.

The homeowner should receive:

• the applicable Certificate of Compliance and test report for the addition or alteration
• the charger model and serial number, warranty information and user instructions
• a clear description of the circuit and protective devices installed
• the commissioned current limit and load-management settings where fitted
• any identified defects or exclusions relating to the existing installation

A fair way to compare quotations

Do not compare only the price beside the word installation. Ask each contractor to state what the price includes. This gives the careful electrician a fair chance to quote the real job and helps the homeowner see when two quotations are not offering the same result.

For electricians entering the EV charging market

EV charging is still unfamiliar work for many competent electricians. There is no shame in checking a new product manual or opening the relevant standard. The danger lies in treating the charger as an ordinary fixed appliance after the technology has introduced a fault condition or control function that the usual arrangement was never selected to handle.

A repeatable approach keeps the work simple: identify the supply and earthing system, obtain the exact EVSE instructions and compliance evidence, calculate the circuit, choose a coordinated protection arrangement, assess load and inverter interaction, then inspect, test and document the completed installation. When the local text is not specific, record the IEC basis used for the design.

Good electricians should not have to lose work because another quotation quietly omits what cannot be seen. A short written scope and protection schedule make the difference visible to the customer.

A sensible installation approach

The charger, cable, protection, earthing, household supply and energy system should be treated as one installation. Start with the site and the exact charger documentation, then specify only the equipment the design needs. Where the local wiring code is less specific, IEC 60364-7-722 and the relevant product standards provide a useful additional benchmark without replacing South African law.

The practical objective is to install the right protection, prove that it operates and leave the homeowner with the evidence.

Need help with your installation

For help with a dealer-supplied wallbox or a complete charging solution, contact NevGridSolutions about the site assessment, protection design, solar or inverter integration, commissioning and compliance documentation.

065 556 4000 | info@nevgridsolutions.co.za | www.nevgridsolutions.co.za

Frequently asked questions