Accessibility Of Uninsulated Live Parts And Film-Coated Wire - Century UL 1086 Manual

DECEMBER 17, 1998

7 Accessibility of Uninsulated Live Parts and Film-Coated Wire

7.1 To reduce the likelihood of unintentional contact that may involve a risk of electric shock from an
uninsulated live part or film-coated wire, an opening in an enclosure shall comply with either (a) or (b).
a) For an opening that has a minor dimension (see 7.5) less than 1 inch (25.4 mm), such a part
or wire shall not be contacted by the probe illustrated in Figure 7.1.
b) For an opening that has a minor dimension of 1 inch or more, such a part or wire shall be
spaced from the opening as specified in Table 7.1.
Exception: A motor other than one used in a hand-supported portion of an appliance need not comply
with these requirements if it complies with the requirements in 7.2.
7.2 With respect to a part or wire as mentioned in 7.1, in an integral enclosure of a motor as mentioned
in the exception to 7.1:
a) An opening that has a minor dimension (see 7.5) less than 3/4-inch (19.1 mm) is acceptable
if:
1) Film-coated wire cannot be contacted by the probe illustrated in Figure 7.2;
2) In a directly accessible motor (see 7.6), an uninsulated live part cannot be contacted
by the probe illustrated in Figure 7.3; and
3) In an indirectly accessible motor (see 7.6), an uninsulated live part cannot be
contacted by the probe illustrated in Figure 7.4.
b) An opening that has a minor dimension of 3/4 inch or more is acceptable if a part or wire is
spaced from the opening as specified in Table 7.1.
7.3 The probes mentioned in 7.1 and 7.2 and illustrated in Figures 7.1 – 7.4 shall be applied to any depth
that the opening will permit, and shall be rotated or angled before, during, and after insertion through the
opening to any position that is necessary to examine the enclosure. The probes illustrated in Figures 7.1
and 7.3 shall be applied in any possible configuration; and, if necessary, the configuration shall be
changed after insertion through the opening.
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