Specifications

Circuit Wiring Diagrams
B-2 Stratus ftServer V 100, V 200, and V 400 Systems: Site Planning Guide (R543)
must return to the same reference point in the power distribution system, as close as
possible to zero (0) volt potential relative to earth reference ground. Earth reference
ground is typically a metal stake in the ground to which the ground conductors from one
or more buildings are attached.
As shown in Figure B-1, a star ground is often used to obtain the same earth reference
ground. Each earth reference ground, such as the system base ground, is returned
separately to a common point where a zero-volt (0V) earth ground exists. The star
ground ensures that all equipment is at the same potential and that no noise or safety
problems associated with an unpredictable or uncharacterized grounding system will
occur.
Figure B-1. Star Ground Example
Circuit Wiring Diagrams
The following circuit wiring diagrams show how the hot, ground, and/or neutral AC
signals should be connected to the system’s power input plug:
 Figure B-3 illustrates a single-phase 240-VAC circuit connection.
 Figure B-4 illustrates a split-phase 240-VAC circuit connection.
 Figure B-5 illustrates a three-phase 208-VAC, Y-, or -source circuit connection,
phase-to-neutral.
 Figure B-6 illustrates a three-phase 208-VAC, Y-, or -source circuit connection,
phase-to-phase.
 Figure B-7 illustrates a three-phase 380-VAC, Y-, or -source circuit connection,
phase-to-neutral.
To ftServer system
To Monitor
Earth reference ground (0V)