Planning Guide

Circuit Wiring Diagrams

Electrical Circuit and Wiring Information B-3

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 120-volts AC circuit connection.

• Figure B-4 illustrates a single-phase 240-volts AC circuit connection.

• Figure B-5 illustrates a split-phase 120/240-volts AC circuit connection.

• Figure B-6 illustrates a three-phase 208-volts AC, Y-, or ∆-source circuit

connection, phase-to-neutral.

• Figure B-7 illustrates a three-phase 208-volts AC, Y-, or ∆-source circuit

connection, phase-to-phase.

• Figure B-8 illustrates a three-phase 380V AC, Y-, or ∆-source circuit connection,

phase-to-neutral.

In the diagrams in this appendix, the power inputs for

an Express5800/320Fc

system are labeled X and Y, as shown in Figure B-2, to eliminate any ambiguities

in the nomenclature. For single-phase applications, the X input is connected to the

L (Line) hot input, and the Y input is connected to the N (Neutral) input. However,

for split-phase or three-phase applications, the X and Y inputs are connected to L1,

L2, or L3 (separate lines). Therefore, for split-phase or three-phase applications,

both X and Y can be electrically hot with respect to the system base (earth reference

ground). Figure B-2 shows the physical locations of the

X and Y inputs on the

system base.

Figure B-2. Power Input Labeling

Power input A or B (Face View)

G (PE)