36
83532002 Rev C
WARNING
Some components inside the Power Supply are at AC/DC voltage
even when the AC Input On/Off switch is in the “Off” position. To
avoid electric shock hazard, disconnect the AC input and load (DC
Output) and wait 15 minutes before removing any cover.
The Power Supply AC On/Off switch is not the main disconnect device and does not
completely disconnect all internal circuits from the AC power source.
The customer AC Input connects to the Power Supply through four threaded-stud type
terminals. Only use a power cable with the correct voltage and current ratings. The
recommended wire gauge is listed in the table in Section 3.7.1. The ground wire must be
equal to or larger than the recommended gauge for each AC phase.
The Power Supply must be permanently connected to an approved AC distribution box
with suitably rated over current protection (60Amp UL Listed fuse for 208VAC input, and
40Amp UL listed fuse for 400VAC/480VAC input).
Figure 3-1. AC Input Connections
3.7.1. Recommended Cable Size for AC Input Connection
INPUT VOLTAGE
(VAC)
CURRENT PER PHASE
(Arms)
RECOMMENDED
COPPER WIRE SIZE
208 75 4 AWG
400 45 6 AWG
480 35 7 AWG
The AC input current and voltage rating is marked on the rear terminal of the Power
Supply.
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