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You could refer to the following grounding requirement of IEC60598-1 and check it it will comply with it.
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3 a% ~$ s1 m. J+ F$ [1. The earth terminal connection shall be adequately locked against accidental loosening.4 _% T" p" M" }" g7 ^( v
2. Self-tapping screws may be used to provide earth continuity and at least two screws are used.- Y; |) X* v2 L* G" v
3. Thread-forming screws may be used to provide earth continuity .( [) @# {% q) C) w
4. The screw or the other part of the earth terminal shall be made of brass or other non-rusting ) F5 u7 G$ K+ y2 i+ e
metal, and the contact surface shanll be bare metal.' O& j$ u; w6 L# o% G
5. It comply with the earth continuity test of 10A, 0.5Ohm |
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