Cables exposed to the risk of physical damage must be enclosed in a steel conduit or protected by a metal casing unless the
cable's covering (for example armour or sheath) is sufficient to protect it from the damage risk.
Cables exposed to an exceptional risk of mechanical damage (for example in holds, storage-spaces and cargo-spaces) must be
protected by a suitable casing or conduit, even when armoured, if the cable covering does not guarantee sufficient protection
for the cables.
Metallic materials used for the physical protection of cables must be suitably protected against corrosion.