Practice question

What electrical installation requirement must be met by all wiring located behind the driver's cab on an EX/III vehicle?

  1. Wiring must be exposed single-core copper wire without insulation for easy inspection
  2. Wiring must be powered directly by 240V AC mains electricity
  3. Wiring must be seamless, heavily insulated, protected against impact by conduits or stone-guards, and fused
  4. Wiring must be suspended outside the vehicle body on hooks

Answer: C — Wiring must be seamless, heavily insulated, protected against impact by conduits or stone-guards, and fused

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