Cooper Bussmann CT02MAN manual Appendix Sheet

Table 250.122. Minimum Size Equipment Grounding

Conductors for Grounding Raceways and Equipment

Rating or Setting of		Size
Automatic Overcurrent	(AWG or kcmil)
Device in Circuit Ahead
of Equipment, Conduit,		Aluminum or
etc., Not Exceeding		Copper-Clad
(Amperes)	Copper	Aluminum*
15	14	12
20	12	10
30	10	8
40	10	8
60	10	8
100	8	6
200	6	4
300	4	2
400	3	1
500	2	1/0
600	1	2/0
800	1/0	3/0
1000	2/0	4/0
1200	3/0	250
1600	4/0	350
2000	250	400
2500	350	600
3000	400	600
4000	500	800
5000	700	1200
6000	800	1200

Reprinted with permission from NFPA 70-1999, the National Electrical Code®, Copyright© 1998, National Fire

Protection Association, Quincy, MA 02269. This reprinted material is not the complete and official position of the National

Fire Protection Association, on the referenced subject which is represented only by the standard in its entirety.

	Appendix Sheet 7
Cable Tray Manual	Cooper B-Line, Inc

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