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Degrees of protection against access to hazardous parts

2017-08-10 [30]

Degrees of protection against access to hazardous parts indicated

First characteristic numberal Degree of protection   Test conditions
Briel description Definition
0 Non-protected - -
1 Protected against access to hazardous parts with the back of a hand The access probe, sphere of 50mmΦ,shall have adequate clearance form hazardous parts. 12.2
2 Protected against access to hazardous parts with a finger The jointed test finger of 12mmΦ, 80mm length,shall have adequate clearance form hazardous parts. 12.2
3 Protected against access to hazardous parts with a tool The access probe of 2.5mm Φ shall not penetrate  12.2
4 Protected against access to hazardous parts with a wire The access probe of 1.0mm Φ shall not penetrate  12.2
5 Protected against access to hazardous parts with a wire The access probe of 1.0mm Φ shall not penetrate  12.2
6 Protected against access to hazardous parts with a wire The access probe of 1.0mm Φ shall not penetrate  12.2
Note:  In the case of the first characteristic numberal 3,4,5,6, protection against access to hazardous parts is satisfied if adequate clearance is kept.
           The adequate clearance should be specified by the relevant product committee in accordance with 12.3.
           Due to the simultaneous requirement specified in table 2, the definition" shall not penetrate" is given in table 1.