(2)All electric wiring in a hazardous area, other than the conductors of an intrinsically safe circuit, shall be effectively sealed at all joints, mechanically protected and adequately supported throughout its length and shall consist of-(i)approved armoured cable with correctly designed terminations, complete with armour clamps, the armouring being carried and electrical clamps to provide mechanical support to the cable and electrical continuity; or(ii)approved metal sheathed cable with correctly designed and installed terminations; or(iii)single or multicored insulated cables accommodated in solid drawn heavy gauge screwed galvanised conduits used in conjunction with approved flame-proof fittings, the conduit being sealed at both ends and installed in such a manner as to permit internal condensation to drain to a point or points from which it may be removed; where a conduit runs from a zone "1" area to zone "2" area or an area which is not hazardous area, an adequate seal shall be provided outside the boundary of zone "1" area;(iv)single or multicored mineral insulated cable of approved type in conjunction with approved flame-proof type glands at all joints and terminations;(v)bare conductors contained in an approved flame-proof or forming part of an intrinsically safe circuit.
