美款割草机设计安规认证标准分析

带电体的防护
7.4 The opening illustrated in Figure 7.4, is acceptable if, within the enclosure, there is no uninsulated live part or film-coated wire: a) Less than X distance from the perimeter of the opening; and b) Within the volume generated by projecting the perimeter distance X normal to its plane. X equals five times the diameter of the largest diameter rod that can be inserted through the opening, but not less than 4 inches (101 mm). In evaluating an opening, any barrier located within the volume usually is ignored unless it intersects the boundaries of the volume in a continuous, closed line.
1.切割件且 2.任何切割件的金属护罩 b.可能被握持的表面： 1.与带电体双重绝缘隔离或 2.不包封电气组件，并且与包含电气组件的所有不带电金属件隔离，其中电气组件用满
足81.1和81.1的第二条绝缘包封。
带电体的防护
7.2 An opening in the handle portion – the area likely to be handled during normal operation in guiding – of a lawn mower is acceptableBaidu Nhomakorabeaif the probe of Figure 7.1, when inserted as far as possible into the
1) The cutting member; and 2) Any metallic guard for the cutting member; and b) Surfaces likely to be grasped: 1) Are double-insulated from live parts; or 2) Do not enclose electrical components and are separated from all dead metal parts that enclose
7.2带电部分应固定或包封好以减少与非绝缘带电体的接触，绝缘刷无须额外的护罩。 7.2 手柄的开口部分-操作时可触及的部分是可以接受的，如果图7.1中的管子尽可能插入开口： 进入开口的距离不超过3.2mm并且 不能接触非绝缘带电体或漆包线。 7.3 根据7.1所述的要求和7.2中暗示的要求外，在以下情况下也能使用： 当使用不适当的力以不定的方向把7.2中管子插入开口时不能触及非绝缘带电部分或漆包线。 当使用不适当的力以不定的方向把7.3中管子插入开口时不能触及非绝缘带电部分或漆包线。
electrical components by insulation complying with the requirements in 80.1, and the second entry in Table 80.1.
操作时接触到的手柄或其他外表面可以导体如果满足以下要求： a.在可能被握持的表面和下列元件之间为满足80.1和80.1的第二条的要求的绝缘：
美洲割草机标准
手柄
6.4.3 The outer surfaces of a handle or other area likely to be grasped during normal operation may be of electrically conductive material if:
a) Insulation complying with the requirements in 80.1, and the second entry in Table 80.1, is interposed between the surfaces likely to be grasped and:
coated wire when inserted through the opening in any possible direction using no appreciable force; and b) A probe as illustrated in Figure 7.3, cannot be made to touch any uninsulated live part when inserted through the opening in any possible direction using no appreciable force.
opening: a) Does not enter the opening for a distance of more than 1/8 inch (3.2 mm); and b) Does not touch any uninsulated live part or film-coated wire. 7.3 With reference to the requirement in 7.1, and except as indicated in 7.2, an opening is capable of being used when: a) A probe as illustrated in Figure 7.2, cannot be made to touch any uninsulated live part or any film-