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Page Title:
Grounding Electrode Conductor (GEC) |
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|  DOE-HDBK-1092-2004
1.
240-V, three-phase, three-wire delta
2.
480-V, three-phase, three-wire
3.
600-V, three-phase, three-wire.
NEC 250.20
Figure 4-5. Systems of 50 to 1,000 V AC that operate grounded are required to have the
grounded conductor connected to earth ground at the supplying transformer and
service equipment.
These electrical systems do not supply phase-to-neutral loads. They supply only phase-to-
phase loads.
4.7
GROUNDING ELECTRODE CONDUCTOR (GEC)
The main purpose of the grounding electrode conductor (GEC) is to connect the electrical
system to earth ground. The GEC actually provides three grounding paths to the grounding
electrode system. They are as follows:
1.
The grounded conductor path
2.
The equipment grounding path
3.
The bonding path
4-7
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