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12 Feb, 2024 47 Views Author: Cherry Shen

UL 2200 Figure 8.2 Probe for Moving Parts and Uninsulated Live Parts in Engine Generator Assemblies

8 Protection of Users-Accessibility of Uninsulated Live Parts and Moving Parts-and User Servicing in UL 2200

8.1 The requirements in 8.2-8.17 apply only to low voltage parts that are accessible to the user and are isolated from medium voltage circuits. See 8.18 for requirements for medium voltage parts and low voltage parts that are not isolated from medium voltage circuits. For protection of service personnel requirements, refer to Section 43. Protection of Service Personnel.

UL 2200 Figure 8.2 Probe for Moving Parts and Uninsulated Live Parts in Engine Generator Assemblies

SMT PA130B_AL

8.2 Uninsulated live parts a potential involving a risk of electric shock,risk of electrical high/energy levels or risk of iujury due to moving parts that are located in an area containing access to controls or disconnects by the user shall be insulated or enclosed to reduce the likelihood of contact with such parts, regardless of their location.

8.3 Engine generator assemblies intended to be located within a restricted access area are not considered user accessible when provided with the following:

a) Marked as required by 94.14; and
b) Provided with instructions as specified in 96.4(s).

8.4 To reduce the risk of unintentional contact that involves a risk of electric shock from an uninsulated live part or film-coated wire, electrical energy – high current levels, or injury to persons from a moving part, an opening in an enclosure shall comply with either (a) or (b):
a) For an opening that has a minor dimension (see 8.8) less than 25.4 mm (1 inch), such a rotating part, live part or wire shall not be contacted by the probe illustrated in Figure 8.1.
b) For an opening that has a minor dimension of 25.4 mm (1 inch) or more, such a part or wire shall be spaced from the opening as specified in Table 8.1.

Exception: An opening in an integral enclosure of a motor or altemator is not required to comply with these requirements when it complies with 8.5.
8.5 With respect to a part or wire as specified in 8.4, in an integral enclosure of a generator as specified in the Exception to 8.4:
a) An opening that has a minor dimension (see 8.8) less than 19.1 mm (3/4 inch) complies when:
1)A moving part is not contacted by the probe illustrated in Figure 8.2;
2)Film-coated wire is not contacted by the probe illustrated in Figure 8.3;
3)In a directly accessible generator (see 8.10), an uninsulated live part is not contacted by the probe illustrated in Figure 8.1; and
4) In an indirectly accessible generator (see 8.9). an uninsulated live part is not contacted by the probe illustrated in Figure 8.2.

UL 2200 Figure 8.2 Probe for Moving Parts and Uninsulated Live Parts in Engine Generator Assemblies

UL 2200 Figure 8.2 Probe for Moving Parts and Uninsulated Live Parts in Engine Generator Assemblies

b) An opening that has a minor dimension of 19.1 mm (3/4 inch) or more complies when a part or wire is spaced from the opening as specified in Table 8.1.

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