A cable enclosure must provide reasonable protection against damage from environmental and other external influences. Typically this includes exposure to weather (UV and water), flora, fauna, galvanic action and the accumulation of dust.
Excessive ingress of any, or a combination of the above factors, may make cable enclosures hazardous as well as causing damage to their contents.
The degree of protection provided by a lid or access cover against the ingress of water or foreign objects, (needles, fingers, etc.) is expressed as an IP (International Protection) rating, in accordance with AS/NZS 60529. AS/NZS 2053.1 applies this to all conduits and fittings and AS/ACIF S008 applies this specifically to communications enclosures.
Field maintenance crews should always check for the presence of hidden hazards such as dangerous gases, reptiles, insects or sharp objects.