In accordance with any instructions included in the listing or
labeling [110.3(B)].
This isn't defined in the NEC [110.12]. But a qualified person
is expected to know what this means. In many cases, the NEC will
provide an occasional clarifying requirement, but don't read
something that isn't there.
Close them [110.12(A)]. This is
one of the most common Code violations.
The first is that the equipment
must be firmly secured to the surface on which it is mounted.
You can generally achieve this by simply using the
manufacturer's mounting hardware. The second is you can't use
wooden plugs as a means of mounting.
Yes, but only as allowed by
110.14.
The temperature rating of the
connected equipment [110.14(C)(1)]. But see Annex D(2)(b) for an
application where this isn't a limitation.
No. Part II applies to 600V and
under; Part III applies to over 600V.
Yes and no. Three feet is the
minimum. The NEC provides other space requirements,
depending on various factors. See the tables in 110, which you
will also find in OSHA Part 1926 Subpart E. Operational,
maintenance, and other considerations may cause you to provide
even more space.
Guard against accidental
contact, guard against physical damage, and provide proper
signage [110.27].
They must be
corrosion-resistant [110.79].
