1 For equipment above a height of 450 mm above
the deck, the degree of protection for electrical equipment required
by this section should have an enclosure having an ingress protection
of at least IP 55 as defined in IEC Publication 529 - Classification
of degree of protection provided by enclosures, or by apparatus for
use in zone 2 areas as defined in IEC Publication 79 - Electrical
apparatus for explosive gas atmospheres (temperature class T 3).
2 For equipment at or below a height of 450 mm
above deck, the electrical equipment referred to in this section should
be certified "safe type" and wiring, if fitted, and should be suitable
for use in zone 1 areas as defined in IEC Publication 79 - Electrical
apparatus for explosive gas atmospheres - (gas group II A and temperature
class T 3).