Figure B-2. Power Input Labeling; Figure B-5. Figure - NEC Express5800/320Ma Planning Manual

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
•
Figure B-4
•
Figure B-5
•
Figure B-6
connection, phase-to-neutral.
•
Figure B-7
connection, phase-to-phase.
•
Figure B-8
phase-to-neutral.
In the diagrams in this appendix, the power inputs for Express5800/320Ma 3.2 GHz,
3.6 GHz, or Dual-Core system are labeled X and Y, as shown in
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).
X and Y inputs on the system base.

Figure B-2. Power Input Labeling

Y
illustrates a single-phase 120-volts AC circuit connection.
illustrates a single-phase 240-volts AC circuit connection.
illustrates a split-phase 120/240-volts AC circuit connection.
illustrates a three-phase 208-volts AC, Y-, or
illustrates a three-phase 208-volts AC, Y-, or
illustrates a three-phase 380V AC, Y-, or
Power input A or B (Face View)
∆
-source circuit connection,
Figure B-2 shows the physical locations of the
X
G (PE)
Electrical Circuit and Wiring Information
Circuit Wiring Diagrams
∆
-source circuit
∆
-source circuit
Figure B-2, to
B-3