Alpha Technologies FLEXNET POWER MPS48-7M - Manual (Page 17)

17 021-511-B4-002, Rev. B
1. Verify utility power is OFF. Tag and lock utility power switch.
2. Remove the 1/2" EMT knockout (7/8" dia.)
and the 3/4" EMT knockout (1 1/8" dia.),
located in the center bottom of the enclosure.
For alternate installation, remove knockouts
from the right side, left side, or back left of the
enclosure as needed.
3. Install the provided 1/2" strain relief fi tting, or
user-supplied 1/2" Electrical Metallic Tubing
(EMT), in the front 1/2" knockout. Route the
line cord, or #18AWG wire for line, neutral,
and ground, between the enclosure and utility power connection. When installing the
strain relief fi tting, run the line cord or AC wiring through the outer nut before installing the
rest of the fi tting. See Fig. 4-1.
4. For 120V applications: connect the line and neutral wires to the AC input block. Torque
to 4.5 in-lbs (.5 N m).
For 240V applications: connect L1 and L2 wires to the AC input block. Torque to 4.5
in-lbs (.5 N m).
5. Connect the ground wire (green) to the #10 ground stud. Torque to 36 in-lbs (4.1 N m).
6. Tighten the strain relief fi tting using Channellock pliers and a 1" wrench.
7. For 120V applications, remove the protective label on the input voltage select switch, and
move the switch to the 120V position. See Fig. 4-2.
4.0 Installation, continued
4.4 AC Input (120/240Vac) Connection Procedure
Required Tools and Materials:
• Hammer with punch or screwdriver
• 1" Open-end wrench
• Channellock pliers
• 11/32" (9mm) torque wrench or nut driver
• #1 fl athead torque screwdriver
Fig. 4-1, AC Connections
1/2" Knockout
3/4" Knockout
Fig. 4-2, Input Voltage Select Switch
Up for
120V
ATTENTION:
The user or installer must provide an accessible system disconnect device located near the power supply
enclosure as required by local electrical codes, and an over-current protection device with a maximum rating
of 20A, or as required by local electrical codes.
Outer Nut