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按照UL1598,可以做17.2.4的测试:1 M+ k5 I9 }0 H+ I9 C0 W8 w
17.2.4 The test of impedance shall be performed by passing a 30 A current from a part to be grounded% S5 Y0 q: z1 i- D7 n7 X5 ~3 a( k
to the grounding terminal means for a period of 2 min and measuring the potential drop between them at
. U- a5 q/ Y/ ~' ]9 v9 J/ c3 Rthe end of the period.
, F7 Q# f( \+ c, z9 a/ J5 P17.2.5 When tested in accordance with Clause 17.2.4:
7 z) Q; z P G3 p% B: ^3 }(a) the resulting voltage drop shall not exceed 4.0 V; and
w2 C& G: t) j6 `. z$ h5 ?(b) there shall be no melting of any conductor or metal in the bonding circuit
7 F- k) |2 j# s) e(c) there shall be no heating or burning that is likely to create a fire hazard. |
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