Q: How to handle premature sheath degradation of underground buried power cables caused by termite and soil corrosion across Africa and Southeast Asia tropical sites?

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A: Ordinary PVC‑sheathed cables suffer fast attack from termites and acidic‑alkaline tropical soil. Even if cables pass factory anti‑termite testing, local soil chemical composition varies greatly across different project zones. For direct‑buried routes, adopt anti‑termite armoured structure or add extra protective conduit layer rather than fully relying on cable‑jacket material. Conduct soil‑sample analysis before installation, set up periodic partial‑discharge and sheath‑integrity testing cycles, and replace segments with irreversible sheath erosion.