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从UL1082上截取的:
* ?' V6 k0 Q8 Y& p" E# w3 p5 t; @29 Resistance of Grounding Test, y2 k! C4 W9 d% m O6 H! u
29.1 The resistance between the point of connection of the equipment-grounding means at or within the
0 i; F. L9 C, K1 }# P8 Kappliance and any other point in the grounding circuit of the appliance shall not exceed 0.1 ohms.
. {& c; |, g, R/ ~29.2 Compliance with the requirement in 29.1 is to be determined by:2 D1 S9 Y' m E9 W
a) A resistance-measuring instrument, or( r% \$ l% }0 Z1 q& t% ~6 X$ v. U8 O
b) Passing an alternating current of at least 25 amperes from a power supply of not more than
, i p- |9 I% F: [; r3 ]12 volts from the grounding pin of the attachment plug cap to a point in the grounding circuit,& Z9 o n0 Y% f( f
and then measuring the resulting drop in potential between the two points. The resistance in
# H5 ^7 P) L0 H* a9 O' iohms is to be determined by dividing the drop in potential in volts by the current in amperes
% c3 ?7 i" T) c; G( V8 d4 Tpassing between the two points. |
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