Legislation, Audits & Inspections13 min readPublished 20 August 2026

Electrical Installation Regulations (EIR): CoC Mandates for Commercial Buildings

The comprehensive compliance guide to the Electrical Installation Regulations (EIR) and SANS 10142-1 in South Africa, detailing Electrical Certificates of Compliance (CoC), tenant alterations, and landlord liability.

Commercial main distribution board MDB and electrical substation undergoing certified SANS 10142-1 test auditStatutory Electrical Certificates of Compliance (CoC), thermal imaging, and SANS 10142-1 audits.

1. Statutory EIR Regulation 7 Mandate Explained

Under Regulation 7 of the Electrical Installation Regulations, the owner or lessor of an electrical installation must ensure that a valid Certificate of Compliance is retained on site and produced upon demand by any DoEL inspector or municipal authority.

Frequently Asked Questions

How long is a commercial electrical CoC valid in South Africa?

An electrical CoC remains valid indefinitely provided no additions or alterations are made to the installation, although standard property transfer laws require a CoC not older than 2 years.

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Written by Diba Electrical Safety PracticeVerified by Orlinda Pieterson
Senior Electrical Safety SpecialistsPr.Eng, Master Installation Electrician (MIE), SANS 10142 Specialist

Diba BES is a 100% Black Women-Owned, Level 1 B-BBEE provider delivering occupational health & safety consulting, accredited workplace training, and commercial workplace services across South Africa since 2003.