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An electrical safety audit is an independent check of how safe your installation really is. In offices, malls, hotels, schools, hospitals and factories across Nigeria, we find many of the same hazards again and again. Most of them are invisible until something fails, and almost all of them are cheap to fix once found.
This guide explains what an audit covers, the hazards it most often finds, and how often your building should be inspected.
A proper audit combines a visual inspection, testing and a document review. It typically includes:
At the end you should receive a written report that ranks each hazard by severity and gives a deadline for fixing it.
Equipment without a working earth connection, or earth pits with high resistance, leave people exposed to electric shock and leave sensitive equipment unprotected. Earth resistance should be measured, not assumed. Learn more about earthing and lightning protection.
Extension boards plugged into extension boards, and air conditioners added to lighting circuits, push cables beyond their rating. The result is heat, nuisance tripping and fire risk.
When a breaker keeps tripping, it is often replaced with a bigger one. The cable is then no longer protected, and it can overheat without the breaker ever operating.
Loose connections in distribution boards heat up under load. Thermal imaging finds them while the system is running, before they burn out.
Poorly wired changeover arrangements can back-feed the grid or connect two supplies together. A correctly rated changeover switch or ATS panel prevents this.
Missing distribution board covers, open trunking and damaged sockets are a direct shock risk, especially where cleaners and non-technical staff work.
Circuits feeding sockets, outdoor equipment and wet areas often have no RCD protection, which is one of the most effective defences against electric shock.
Panels and sockets installed outdoors, near pumps or under leaking roofs need suitable IP-rated enclosures. Rainy-season water ingress is a frequent cause of faults.
Tall buildings and facilities with sensitive electronics need lightning protection and surge protection devices. Without them, a single storm can destroy equipment.
Unlabelled boards and missing single-line diagrams slow down every repair and make safe isolation difficult. Every installation should have up-to-date drawings and test records.
As a guide, commercial and industrial facilities should have a full electrical safety audit at least once a year, with thermal imaging of main boards in between. Audit sooner after a fire, flood, major fault, change of tenant or significant new load.
See what happens when installations are not checked in our post on the real cost of hiring the wrong electrician.
Corustar Technological Services is an electrical engineering contractor based in Ikeja, Lagos, working across Nigeria. See our Electrical Safety Audit service, request a quote, or call +234 816 976 9672. For outages and faults, call our 24/7 emergency line on 0705 739 9297.
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