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fasten 发表于 2019-1-19 09:390 O( d1 p) ~* \, i% Z# p2 \* G9 U3 H
42.3 For an appliance using a cord swivel construction, the test described in 42.2 is to be conducte ... " X$ X( ]) y1 l; S; C
49.2 Each sample is to be mounted in a guide with a 1/4 pound (113 g) weight attached to the cord 8) W8 c) j% I2 u5 }0 N+ |
inches (203 mm) from the cord entry hole so that the unit can be rotated 540 degrees about the axial
1 W0 {$ U& m7 G7 X. kcenter of the cord. A typical arrangement is shown in Figure 49.1. The rate of flexing is to be 10 cycles9 Y! e8 h0 B- l4 l
per minute, where 1 cycle is equivalent to three complete rotations as defined in Note (a) of Table 49.1,
) N& v+ z+ }1 n* fresulting in a rotational speed of 30 rotations per minute. During the test, the supply cord conductors of- _8 Q; h9 }0 b! o+ M" f/ }
the sample are to carry current equal to the current rating of the appliance at rated voltage. The ″as
- I5 a2 n/ |( B+ ~received″ samples are to be subjected to the number of cycles of flexing specified in Table 49.1. The
6 T+ [! o7 @* e: V% Nconditioned samples of a hand-supported hair-drying appliance are to be subjected to 1,000 cycles of
- C4 Q5 Q. F7 O1 O" v0 L- ~, m2 ~flexing.
- E8 ^: d7 m; Q# P8 m$ F" ]Exception No. 1: With the concurrence of all concerned, the attached weight may be other than 1/4 pound,
- r5 r- I9 u8 q; I6 ~adjusted such that the cord is held taut and the intended flexing action is produced.
& T0 a2 U; W2 \3 \: N% D# [, `: tException No. 2: With the concurrence of all concerned, the rate of rotation or cycle rate may be greater
9 c* Q2 c+ a! |( Kthan specified/ X0 u& B& p- g5 I% U. |4 Y
2 a4 @7 E2 d) a1 ?! b这里只是描述测试方法,没说转尾在线上吧? |
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