Page 147 - 捷運技術 第28期

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(System Earth)
1 ( )
(Quiet Earth) (Clean Earth)

4 ( )
(TLAIM)

25
(Lightning Earth) 10
( )

(J/D Earth)
10 ( )
(Tel. Earth)

15 ( )
( )

(91 10 )
(91 6 )

ANSI/IEEE Std. 80 (1986) IEEE Guide for Safety in AC
(89 )
(88 )

(Primary Grounding)

(Secondary Grounding)

PVC

( , )