UFC 3-560-01
6 December 2006
Including change 1, 7 December 2006
13-4.2
Portable Power Cable and Outlet Safety Assurance.
WARNING
Harsh waterfront environments provide salt spray, high humidity, and cold
temperature conditions. All these result in more rapid deterioration of
permanent installations. Portable power cables, if not adequately
barricaded are subject to abuse from the wheels of vehicles used in
industrial operations. Families welcoming Naval personnel home from the
sea and even Naval personnel and contractor personnel working on piers
have no understanding of the dangers from a damaged energized power
cable which is installed in a position accessible to the public.
13-4.3
Electrical Equipment Accessibility and Working Space.
WARNING
Electrical equipment in underground vaults is not readily accessible and
might not meet current NEC working space requirements.
13-4.3.1 Readily Accessible.
WARNING
The NEC defines ready accessible as capable of being reached quickly for
operation, renewal, or inspections, without requiring those to whom ready
access is requisite to climb over or remove obstacles or to resort to
portable ladders, chairs, or other such devices. Therefore all workers in
vaults must meet the confined space requirements of Chapter 3.
13-4.3.2 Working Space. The NEC defines working space as sufficient access
provided and maintained about all electric equipment to permit ready and safe operation
and maintenance of such equipment.
13-4.3.2.1 Working space in vaults has been provided in accordance with the NEC
requirements applying at the time the vault was built.
13-4.3.2.2 As with all safety aspects affecting both the public and workers, safety
requirements have become more rigorous over the years.
13-4.3.2.3 Although current NEC requirements do not apply to vaults built to previous
NEC editions, the NEC current requirements should be compared by each activity with
actual working space provisions.
13-14
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