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    The Most Common Electrical Faults in Older Johannesburg Homes

    Older homes hold charming features and outdated wiring. The electrical faults we find most often in older Johannesburg houses, why they matter, and how they're fixed.

    21 March 2026 6 min read
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    Older Johannesburg homes have character — and, very often, wiring that predates modern safety standards. These are the faults we find again and again, and why they're worth fixing.

    No earth-leakage protection

    The big one. Without modern earth leakage, a fault that should trip safely can instead cause a shock or fire. Adding it (usually via a DB board upgrade) is one of the highest-impact safety fixes.

    Old fuse boards

    Rewireable fuses instead of breakers are a sign of an ageing installation that lacks modern protection. Upgrading to a proper breaker board with earth leakage is standard.

    Aged wiring

    Cloth or rubber-insulated cable degrades and becomes brittle and unsafe — a candidate for rewiring.

    Too few sockets & DIY additions

    Extension-lead overload and years of unqualified additions create overloaded circuits and hidden hazards. Proper dedicated sockets fix the first; an inspection finds the second.

    Get it assessed

    An Electrical COC inspection identifies exactly what's unsafe or non-compliant, and it can usually be staged — dangerous parts first. Book an inspection for your older home.

    Frequently Asked Questions

    No or inadequate earth-leakage protection, old fuse boards instead of breakers, aged cloth/rubber-insulated wiring, too few sockets (extension-lead overload), poor or missing earthing, non-compliant DB boards, and unsafe DIY additions made over the years. Any of these is a safety and compliance issue worth addressing.

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