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60598里的规定:
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/ Q! d5 J8 v! e: G' ]5 c' XA current of at least 10 A, derived from a source with a no-load voltage not exceeding 12 V,8 g; u. u$ x4 k* E
shall be passed between the earthing terminal or earthing contact and each of the accessible* l) y% F Y6 }- P
metal parts in turn.
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1 o; @# r- d/ X) kThe voltage drop between the earthing terminal or earthing contact and the accessible metal
/ r0 \; }8 m# g" Qpart shall be measured and the resistance calculated from the current and the voltage drop. In
9 N( u9 p0 y! O/ k2 b# J( l: f5 S# cno case shall the resistance exceed 0,5 Ω. When type testing, the current shall be applied for a
$ U1 U8 r8 C2 ?, mperiod of at least 1 min.( O6 M" S: ?. G' C1 f/ }
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NOTE :In the case of a luminaire with a non-detachable flexible cable for the supply connection, the earthing contact is at the plug or supply end of the flexible cable or cord. |
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