Oct 23, 2025

What Is an Electrical Compliance Certificate (COC) and Why Do You Need It?

Introduction

When you’re buying or selling a home, leasing a property, or simply ensuring your electrical installation is safe and legally compliant, one document often stands between you and serious risk: the Electrical Certificate of Compliance (COC). In South Africa, this certificate is not a nice-to-have—it’s a legal safeguard, a vital insurance and safety document, and a professional responsibility. In this blog we’ll unpack exactly what a COC is, the legal and safety imperatives behind it, who is qualified to issue it, how long it lasts, what inspectors look for, and ultimately how proper training—such as that provided by TDMI Training—ensures that electricians are equipped to issue valid certificates. Whether you’re a homeowner, landlord, estate agent, or electrician, by the end of this article you’ll understand why you need a COC and how to ensure it’s properly issued.

What exactly is an Electrical Certificate of Compliance (COC)?

The term “Electrical Certificate of Compliance,” often abbreviated as COC (or sometimes ECC) refers to a formal document that confirms an electrical installation has been inspected, tested and found to comply with the relevant South African standards and regulations as at the date of issue. According to the NearbyElectrician, the Certificate of Compliance is “just a one-page legal document; the remaining information you receive is what is known as a ‘test report’. ” A typical COC will include the following details: the name and registration number of the issuing electrician or contractor; the address of the installation; a declaration that the “electrical installation has been carried out in accordance with the requirements of the Occupational Health and Safety Act” and relevant regulations; date of inspection; and a unique certificate number for traceability.

It’s important to note that while the certificate is one page, it is accompanied by a more detailed test report or annexures (wiring diagrams, test measurements, photos) which provide the technical backup for the declaration. In practical terms, the COC confirms that the installation was, at the moment of inspection, reasonably safe and compliant, and that the responsible registered electrician accepts legal liability for that statement. It is not a guarantee that the installation will never fail, but rather that it met the standards at the time of issue.

The legal framework in South Africa: SANS, Electrical Installation Regulations and OHSA

Understanding why a COC exists requires a glance at the legal framework underpinning electrical installation safety in South Africa. The core regulatory basis is the Electrical Installation Regulations, 2009, promulgated under the Occupational Health and Safety Act, 1993 (OHSA). These regulations set out that any electrical installation must be maintained in a safe condition and inspected where required.
In parallel, the technical standard against which compliance is measured is SANS 10142‑1 (The Wiring Code) (“Requirements for Electrical Installations”). This standard is updated periodically (Edition 3, Edition 2 etc) to reflect advances and changes in technology and best practice.
What this means legally is: the owner or “user/lessor” of an electrical installation must ensure they have a valid Certificate of Compliance and associated test report. The law does not permit a non-registered person to issue a valid COC, nor does it permit the user/lessor to permit the installation to be used without certification when required.

In practice, this legal framework is important because it means: a property transfer, lease or insurance claim may hinge on the existence of a valid COC. Without it, you may face legal exposure, invalidated insurance cover, or denied transfer processes.

Who is authorised to issue a COC? (roles, registration, and scope)

One of the most critical points when dealing with COCs is: who is permitted, by law, to issue them? The short answer: only a qualified and registered person, in the correct category, may issue a valid COC. According to a recent industry article, to issue an Electrical Compliance Certificate the electrician must be registered with the Department of Labour and have the relevant qualifications in electrical installation work (including compliance with SANS 10142).
In South Africa, the categories often encountered are:

ETSP (Electrical Tester for Single Phase) – generally limited to single-phase installations.
IE (Installation Electrician) – can inspect/test/issue for single and three-phase installations, with the appropriate registration.
MIE (Master Installation Electrician) – highest qualification, can issue for complicated or specialised installations (industrial, hazardous areas, PV arrays)

When is a COC required? (common triggers & timeframes)

Knowing when you must obtain a COC is just as important as understanding what it is. The most common triggers that legally or practically require a COC include: sale or transfer of property; leasing or renting where the user/lessor changes; new electrical installations or major alterations; reconnection of supply after disconnection; and major property developments. According to one property-services site: “An electrical certificate of compliance (COC) is a crucial document … Whether you’re renovating, building, or selling property, you’ll need a valid COC.”
Regarding timeframes, although the certificate is “valid for the lifetime of the installation” until alterations occur, the industry practice often treats a COC older than two years as needing renewal when ownership changes. The NearbyElectrician article explains: “The Electrical Installation Regulations state that a Certificate of Compliance is valid for two years for purposes of transfer … unless alterations have been done, in which case a supplementary COC must be issued.”
Example scenario: A homeowner is selling a house. The buyer’s mortgage application may require a COC dated within two years. If the existing COC is three years old, the seller arranges for a new inspection, issues a new COC (or supplementary COC if only a small alteration was done) in order to satisfy the finance and transfer requirements.
Tip for landlords/estate agents: When you receive a new tenant or lease, check the age of the current COC and test report. If the certificate is older than two years or recent alterations have been made, schedule a new inspection to avoid liability or insurance risk.

Why the COC matters: safety, liability and insurance

The importance of a Certificate of Compliance goes far beyond simply ticking a box. At its core, the COC is about safety—that the wiring, earthing, protective devices, and overall installation are in a condition that minimises the risk of electric shock, fire or other hazards.

From the liability perspective, the electrician who signs the COC is legally declaring that the installation complies with the regulations at the time of inspection. If something goes wrong and that declaration was incorrect or negligently issued, the electrician (and potentially the contractor) may face legal exposure—for example under the OHSA or through civil claims.
For insurance, the presence (or absence) of a valid COC can be critical. One report for property management warns: “If the property fails any sort of electrical test, the COC will not be granted … insurers could refuse to pay out in the event of a fire claim.”

Practical advice for homeowners & landlords: Don’t wait for a sale or an insurance claim to check your COC. Schedule periodic inspections (especially after major works or if the installation is old). Keep a copy of your COC and the accompanying test report in a safe place—digital copy backed up is best. Before leasing or selling, verify that the certificate is still valid, aligns with the installation, and that any recent work has been followed by a supplementary COC where needed.

What inspectors/testers look for: the most common defects and failures

When an electrician inspects a property for issuance of a COC, several key items come under scrutiny. These tests and checks form the backbone of whether the installation can pass compliance. Some of the most common inspection focuses include:

Earthing and bonding: ensuring all exposed metal parts are properly bonded, main earthing system is intact.
Protective devices and residual-current devices (RCDs)/circuit breakers: ensuring correct protection of circuits and persons.
Insulation resistance tests, earth loop fault-impedance tests, continuity and polarity. The test report must record these values.
Correct labelling of consumer unit (distribution board) and circuit identification.
Visual condition of wiring (old rubber-insulated cable, degraded joints, damage, overheating), condition of sockets, switches, and fixed appliances. Many installation fail-reasons are non-compliance in older circuits. According to one home-owner guide: “older leads in rubber, lead and fabric … would need to be replaced. Modern cables use longer-lasting PVC insulation.”
Example case: An inspector arrives and finds that two circuits in an older house have no RCD protection (required under more recent SANS editions). The electrician issues a quote for remedial work, the property owner approves, the circuits are upgraded, then the test is repeated and a COC is issued.
Practical tip for homeowners before inspection: Do a “pre-inspection checklist”: clear the distribution board so the electrician can access it; check that the consumer unit door opens, labels are legible; ensure all lights/fuses are working (so the inspector isn’t delayed by unrelated faults); if you have had recent renovations, gather documents or photos. This helps reduce inspection time or avoid surprises.

Testing, test reports and paperwork: what must accompany a COC

Having a COC without the supporting documentation means you may be missing the technical backbone that the certificate relies on. Under the SANS 10142 and NearbyElectrician guidance, the inspector must supply not only the COC but also the detailed test report or annexures that record the test values, wiring diagrams, photographs, and in many cases a summary of remedial work.
Typical test measurements include insulation resistance (in mega-ohms), continuity of protective conductors, earth loop fault-impedance values, RCD trip times/limits, polarity and proper wiring. For example, one provider notes that even the simplest domestic inspection might involve insulation resistance, earth leakage device operation (15-30 mA trip) and labelling.

Ownership advice: Keep both the original COC and the test report. Many insurers or conveyancers may ask for them. In some provinces or with some registration tools, you should register the COC in an online database or keep a scanned copy. According to NearbyElectrician guidance: “The CoC is intended to be a traceable document … scan & register your paper copy issued by your electrician.”
Actionable checklist for electricians and owners:

Ensure the certificate number is printed and traceable.
Ensure test report shows values and measurements for each circuit/pattern.
Retain records for the legal minimum period (some recommend five years or more).
If alterations occur later, issue a ‘supplementary COC’ referencing the original.

Common misconceptions & pitfalls (and how to avoid them)

Despite the importance of COCs, there are several myths and common errors that can trip up property owners and contractors alike. Understanding these will help you avoid costly mistakes.

Misconception #1: “A COC is valid forever.” While technically a COC remains valid for the lifetime of the installation if no alterations are made, industry practice recognises that for property transfers many parties expect a certificate not older than two years.
Misconception #2: “Any electrician can issue a COC.” In fact, only a registered person in the correct category can legally issue a COC; if not, the certificate may be invalid and insurance or the transfer may be held up.
Misconception #3: “Once you have a COC, you’re safe no matter what.” Actually, a COC covers the installation at the time of testing. If you later alter or extend your electrical installation (for example adding solar PV, generator, or extension) you need a supplementary COC. Failing to do so can render the original certificate void in effect.
Pitfalls to avoid: Accepting low-cost certificates that are issued without proper testing or by unregistered persons; not retaining the test report; assuming that insurance will automatically cover non-compliant installations or relying on an old certificate without verifying it.

Avoidance strategies: Always verify the issuing electrician’s registration, ask for the detailed test report, ensure the certificate number is unique and traceable, keep digital backups, and schedule periodic inspections (especially after major works). This will safeguard you from liability, insurance refusal, or legal exposure.

How TDMI Training prepares electricians to issue valid COCs

For electricians wanting to issue valid COCs (and for property owners wanting assurance they are dealing with properly trained professionals), the role of effective training is crucial. TDMI Training offers specialised courses that equip electricians with the legal, technical and practical competence to inspect, test and certify installations. According to their course pages, they provide training in Unit Standards (e.g., Test, Inspect & Certify), COC Refresher Courses and combo packages tailored to compliance and safety.
What sets TDMI’s approach apart is that they focus both on the technical elements (interpreting SANS 10142, performing insulation/resistance/loop impedance tests, documenting results) and on the legal/administrative aspects (registration, contractor scope, certificate traceability, client communication). For example, their COC Refresher Course emphasises “correctly completing the COC form, issuing the test report, and understanding when a supplementary COC is required.”
From a risk mitigation standpoint, electricians are better placed to avoid frequent errors: missing test measurements, failing to verify earthing, issuing certificates without correct registration, or misunderstanding who may issue a certificate. One TDMI blog emphasises that “false or blank certificates simply sold” are a major industry risk, and proper training avoids that.

Benefit for homeowners/clients: When you hire an electrician who has been trained in the correct Unit Standards and is familiar with the COC process, you have greater assurance: the inspection will be thorough, the test report will be detailed, the certificate valid, and the risk of remedials or insurance issues reduced. Action for electricians: If you’re not up to date with the latest SANS edition, the latest format of COC/test report (for example the “yellow certificate” vs “blue certificate” distinction in SANS 10142 format updates) then consider enrolling in or recommending a relevant refresher.
In short, TDMI’s training addresses the “how to issue valid COCs” challenge head-on: from knowing when it is required, how to test, how to document, and how to align with the legal obligations. That means less risk for you, the client or the contractor.

Step-by-step: how to get a valid COC (for homeowners, landlords, agents)

Here’s a practical roadmap you can follow whether you’re a homeowner, landlord, or estate agent dealing with a property that needs a COC.
Step 1: Gather documents & history. Collect any prior COCs, major renovation records, wiring diagrams if available, note age of the installation and any recent additions (solar, extension, generator etc).
Step 2: Find a registered electrician. Ask for the contractor’s registration with the Department of Labour (or provincially equivalent body), check their registration number, ask for their previous COC sample if necessary. Ensure their scope includes what you require (single-phase vs three-phase vs solar).
Step 3: Pre-inspection homeowner checklist. Clear access to the distribution board, ensure all switches/fuses work, have circuit labelling if available, ensure any minor faults (blown fuses, exposed wiring) are corrected ahead of the inspection to reduce cost.
Step 4: Inspection & testing. The electrician will perform visual inspection and technical tests (insulation resistance, earth loop impedance, RCD trip, continuity). If the installation passes, the COC and test report are issued. If not, a quotation for remedial work is provided.
Step 5: Receive the COC + test report, register/store. The certificate should bear a unique serial number; the contractor should keep records; you should keep a copy. Some registries allow online registration of the COC for traceability.
Step 6: If failed / alterations were made. After remedial work, the electrician issues a supplementary COC referencing the original certificate, which is then valid again. Make sure this is issued and recorded.
For conveyancers or estate agents: Initiate the COC request early in the sale process—waiting until transfer day often delays registration and may trigger urgent remedial work, which is avoidable. For landlords: keep your COC up to date each time you change tenants or carry out electric work; monitor the certificate’s date and condition of the installation.
By following these steps, you’ll ensure the COC is valid, supported by appropriate test reports, properly registered and likely to be accepted by attorneys, banks, insurers and new owners/tenants.

Conclusion

In South Africa’s property and electrical safety landscape, the Electrical Certificate of Compliance (COC) is far more than a formality. It is the legally mandated, technically substantiated declaration that an electrical installation complies with the required standards at the time of inspection—protecting homeowners, tenants, landlords, estate agents, and insurance interests alike. From the legal scaffolding of the Occupational Health and Safety Act and the Electrical Installation Regulations to the detailed testing protocols of SANS 10142, the COC bridges safety, regulation and professional accountability.

Whether you are a homeowner preparing to sell or lease your property, or an electrician seeking to issue valid certificates, the attention to detail—including registration, test reports, correct form completion, and proper training—makes all the difference. For electricians, enrolling in training such as that offered by TDMI Training ensures you remain competent, compliant and credible. For property owners and agents, verifying the certification process and retaining proper records avoids liability and delays.
Don’t overlook the practical advice: verify the electrician’s registration, insist on the detailed test report, keep your certificate accessible (both physically and digitally), and trigger new inspections when you make alterations or change tenancy/ownership. In doing so, you ensure your installation remains safe, your compliance remains intact, and your professional or personal investment stays protected. A valid COC isn’t merely paperwork—it’s peace of mind.