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Page 48 of 332
Chapter 3 — System and site requirements
553-3021-209
Standard 3.00
The following are additional grounding requirements:
Never connect the single point ground conductor from the Option 11C
Mini system to structural steel members or electrical conduit. Never
tie this conductor to a ground source or grounded electrode that is not
hard-wired to the building reference conductor.
•
Ground conductors for the Option 11C Mini system:
— must not be smaller than #6 AWG (#40 metric) at any point (see
Table 10 on page 49. This table provides a list of grounding wire
requirements specific to some areas)
— must be routed through the same conduit as the phase conductors
that serve the system
— must not be smaller than any phase conductor in the same conduit
— do not carry current under normal operating conditions
•
All ground conductors in the building:
— must be isolated from the neutral bus except at the service entrance
to the building
— must be hardwired to the main ground reference
•
Avoid spliced conductors. Continuous conductors have lower
impedance, and they are more reliable than spliced conductors.
April 2000
CAUTION
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