This probe conforms to standard requirement of
UL507-2006(PA135A)Figure 9.1,
UL749 Figure 1,
UL982 Figure 58.6 and
UL1278 Figure 8.1(PA130A).
It is used for the performance of the electrical equipment enclosure preventing electric shock.
8 Accessibility of Live Parts
8.1 An electrical part of a heater shall be so located or enclosed that protection against unintentional
contact with uninsulated live parts will be provided, except that this requirement does not apply to a visibly glowing open-wire element and the connections immediately adjacent to the element. See 3.1, 8.2, 32.7
and 32.14. Insulated motor brush caps do not require additional enclosures.
8.2 The requirement in 8.1 does not apply to the sheath of an isolated metal-clad element in a heater
having provision for grounding the enclosure, although such a sheath is considered to be a bare live part when spacings are being measured.
8.3 In determining if an opening in an enclosure is acceptable, consideration is to be given to:
-
a) The proximity of uninsulated live parts (as determined by applying 8.1, 8.2, 8.4, 8.5, and
8.15 and
-
b) The possibility of the emission of burning insulation, molten metal, and similar materials
through the opening (as determined by applying 7.3 – 7.6.)
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