GE Industrial Solutions GE TR7000 Series - Manual (Page 8)

2020004602 (12/10) Page 8 of 17
The illustration shown above, provides a recommended method for grounding a separately
derived power system, per the National Electrical Code, Article 250.30. Please check with the
local municipality or governing authority for additional codes or other approved regulatory
requirements before attempting to configure any electrical power distribution system.
X2
X1
X3
X0
PHASE C
PHASE B
PHASE A
NEUTRAL
Bonding Jumper
Ref. NEC 250
-
30 (a) (1)
Grounding Electrode
Ref. NEC 250
-
30 (a) (4)
Primary Dist.
Panel w/Overcurrent
or Service Disconnect
Means
Grounding Electrode
Conductor Ref. NEC
250.62 - 250.64
-
250.66
GROUND
Equipment Grounding
Conductor Ref. NEC
250.32 (B) (1)
N G
Note:
Primary transformer windings
not shown for simplicity
SPD
Example of an NEC Compliant Grounding Arrangement for a Separately Derived System