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从UL1082上截取的:- V1 J8 Y0 ]9 K7 v" l4 W% e6 y, M, P
29 Resistance of Grounding Test
3 g z9 P2 j1 V. v* K5 i9 \3 p, _1 `29.1 The resistance between the point of connection of the equipment-grounding means at or within the
6 r7 s4 W2 X5 C! J& ]appliance and any other point in the grounding circuit of the appliance shall not exceed 0.1 ohms.' D' `/ q* x" s1 ?0 E J
29.2 Compliance with the requirement in 29.1 is to be determined by:
8 C+ h0 W( B; X- H4 Ga) A resistance-measuring instrument, or
, y8 I' ?. _: E! Q2 @b) Passing an alternating current of at least 25 amperes from a power supply of not more than7 {) l& l0 ], N* B( p
12 volts from the grounding pin of the attachment plug cap to a point in the grounding circuit,
9 ^: w& |; u4 e' Z }and then measuring the resulting drop in potential between the two points. The resistance in8 v$ z7 u& R4 L F$ p/ l: |& E
ohms is to be determined by dividing the drop in potential in volts by the current in amperes6 X6 {; L$ B/ f" e2 q
passing between the two points. |
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