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接地阻抗测试Resistance of Grounding Test电流已经更改从25A到30A,是第六版次,其它都没变,电压设置为12V,电阻不能超过0.1ohm.
, l: f; e/ ?- {9 K5 P对比过10A,30A,35A,感觉不到电阻变化很大。
+ g9 X/ i l; T4 kUL1082
1 d; A! z6 P$ h7 w! v/ Y: ]. \29 Resistance of Grounding Test
" p( ]) U" g2 i8 ^# K$ p3 a3 c! G3 X29.1 The resistance between the point of connection of the equipment-grounding means at or within the2 N5 `2 g+ R+ Q$ a& ]& D
appliance and any other point in the grounding circuit of the appliance shall not exceed 0.1 ohms.
! g% l- l& T% X" `' e29.2 Compliance with the requirement in 29.1 is to be determined by:* ]7 D8 g6 e) _2 w$ a. ~7 ?
a) A resistance-measuring instrument; or
) i: Y9 Q) S/ {! B5 _; D% vb) Passing an alternating current of at least 30 amperes from a power supply of not more than
& A9 p y! R# @( C0 H12 volts from the grounding pin of the attachment plug cap to a point in the grounding circuit,3 w$ Q5 e# s; D( `
and then measuring the resulting drop in potential between the two points. The resistance in, l& @; ?: |" n4 Z
ohms is to be determined by dividing the drop in potential in volts by the current in amperes
+ Z/ Y$ [; V; ~% I: lpassing between the two points. |
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