What is the definition of a steel wired armoured cable in electrical engineering?
Underground cables are 'armoured' in order to protect them
against mechanical damage. This armour takes either of two forms:
(1) steel tape, or (2) wire. Wire armour tends to be used on cables
with a larger diameter, as it makes them more flexible compared to
cables with tape armour.
In both cases, the armour is spiral-wound towards the outer part
of the cable along its length and is, itself, protected with a
hessian or plastic outer layer.