UL 2200 Figure 8.3 Probe for Illustrated Film-coated Wire in Generators

8. Protection of Users-Accessibility of Uninsulated Live Parts and Moving Parts-and User Servicing
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 Section43, Protection of Service Personnel.

8.2 Uninsulated live parts at potential involving a risk of electric shock, risk of electrical high energy levels, or risk of injury 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 alternator is not required to comply with these requirements when it complies with 8.5.

UL2200 Figure.1

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) ln 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 (see8.9), an uninsulated live part is not contacted by the probe illustrated in Figure 8.2.

UL2200 Figure.2

UL 2200 Figure 8.3 Probe for Film-coated Wire in Generators

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.

8.6 The probes specified in 8.4 and 8.5 and illustrated in Figure 8.1-Figure 8.3 shall be applied to the maximum possible depth of the opening; and shall be rotated or angled before, during, and after insertion through the opening to any position that is required to examine the enclosure. The probe illustrated in Figure 8.1 shall be applied in any possible configuration; and, where required, the configuration shall be changed after insertion through the opening.

8.7 The probes specified in 8.6 shall be used as measuring instruments to judge the accessibility provided by an opening, and not as instruments to judge the strength of a material. They shall be applied with a maximum force of 4.4 N (1 pound).

8.8 With reference to the requirements in 8.4 and 8.5, the minor dimension of an opening is the diameter of the largest cylindrical probe that is inserted through the opening.

8.9 With reference to the requirements in8.5, an indirectly accessible generator is a generator:
a) That is accessible only by opening or removing a part of the outer enclosure, such as a guard or panel, that is opened or removed without using a tool (see 4.77);
b) That is guarded or enclosed so that the risk of contact is small; or
c) That is determined to have a low risk of contact (see 8.11) due to its location.

8.10 A directly accessible generator is a generator:
a) That is contacted without opening /on removing any part,and
b) That is located so as to be accessible to contact.

8.11 The test pin illustrated in Figure 8.4, when inserted as specified in 8.6 through an opening in an enclosure, shall not touch any uninsulated live part that involves a risk of electric shock.

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.

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