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fasten 发表于 2019-1-19 09:395 S. o) f+ `# S4 N2 c9 A* g& `
42.3 For an appliance using a cord swivel construction, the test described in 42.2 is to be conducte ...
3 |: D; a$ s B l49.2 Each sample is to be mounted in a guide with a 1/4 pound (113 g) weight attached to the cord 8; C: e& J5 \4 U! K: V/ q# T. a
inches (203 mm) from the cord entry hole so that the unit can be rotated 540 degrees about the axial
. e; [- Y0 n) F2 V2 r; ?0 g, acenter of the cord. A typical arrangement is shown in Figure 49.1. The rate of flexing is to be 10 cycles% m) W$ w1 C$ s+ T! G
per minute, where 1 cycle is equivalent to three complete rotations as defined in Note (a) of Table 49.1,
# F7 |" ?& \- ?, }5 m: S7 a3 Q, Mresulting in a rotational speed of 30 rotations per minute. During the test, the supply cord conductors of
- h6 h5 g% `- Z5 k& e7 Rthe sample are to carry current equal to the current rating of the appliance at rated voltage. The ″as
6 S& B3 l9 V: ^! }' Z {received″ samples are to be subjected to the number of cycles of flexing specified in Table 49.1. The/ T3 i/ n9 ^4 q. z- ?
conditioned samples of a hand-supported hair-drying appliance are to be subjected to 1,000 cycles of
- N2 r+ ~# S6 R) [flexing.
# s8 l( _5 P7 m: }. A* s) H9 X7 yException No. 1: With the concurrence of all concerned, the attached weight may be other than 1/4 pound,# p4 I/ d1 n1 p0 o4 x; `
adjusted such that the cord is held taut and the intended flexing action is produced.# m! D4 X+ R4 b2 Z9 p- E
Exception No. 2: With the concurrence of all concerned, the rate of rotation or cycle rate may be greater( _9 Y9 T7 q, ]) l* n7 ?' O Q( R
than specified* m$ G; J) J4 a5 T& c
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这里只是描述测试方法,没说转尾在线上吧? |
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