Paragraph 5.1
All metal sheaths and armour of cables shall be electrically
continuous and shall be earthed.
Paragraph 5.4
Where cables which are installed in hazardous areas introduce
the risk of fire or explosion in the event of an electrical fault
in such areas, special precautions such as the following shall be
taken to control such risks:
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.1 Cables should be appropriately sheathed for
the intended environment.
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.2 Cables should be suitably protected from mechanical
damage.
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.3 Intrinsically safe circuits should be electrically
and mechanically separated from other circuits.
Paragraph 6.1
Each separate circuit shall be protected against short circuit
and against overload, except as permitted in regulations 29 and 30.
When, by design, the circuit is incapable of developing overload,
it may be protected against short circuit only.
Paragraph 9.3
Accumulator batteries shall not be located in sleeping quarters
except where the batteries are hermetically sealed.