4−10 Installationand Maintenance Volume
Octel 200/300 S.4.1 PB60019−01
Installing the Octel 200/300 With –48-Vdc Power Supply Unit
The –48-Vdc powered server does not include a power cord. A terminal block is provided on the back of
the cabinet for field wiring to the DC power source. The installation must be performed as described
below, to comply with National Electrical Code (NEC) and UL regulations. In addition, use only those
materials mentioned, because they must also be controlled. Field-wiring material is not included with the
server, but it can be obtained from a local hardware store or qualified electrician.

List of Materials

The following materials are required for the installation:
-1/2-inch (12.7 mm) diameter conduit.
-UL-approved, insulated, stranded wire to run through the conduit. Three separate wires must be
connected – use three different wire colors. The groundingconductor insulation should be green and
yellow.
-The wire size for the Octel 200 must be 12-gauge (3 mm2).
-The wire size for the Octel 300 must be 10-gauge (5 mm2).
The DC version of the Octel 200/300 must be field-wired and connected to a branch
circuit equipped with a branch-circuit overcurrent-protection device, set at:
-20 A maximum, 60 Vdc for the Octel 200.
-25 A maximum, 60 Vdc for the Octel 300.
.The conduit and the UL-approved, insulated stranded wire can be obtained preassembled.
-Six forked, crimp-on terminals with upturned ends for the wire size and a #10 screw.
-Conduit strain relief to fit a 1.10-inch-diameter hole in the sheet metal.

Installation Procedure

Perform the following steps to install the message server with a –48-Vdc power supply:
1. Place the Octel 200/300 near the –48-Vdc power source.
2. Turn OFF the power to the DC power-sourceoutlet to which the Octel 200/300 will be connected.
3. Open the front door and verify that the power switch on the PSUis in the OFF position.
4. Remove the two screws attaching the cover to the DC filter assembly, asshown in Figure 4-3
(Octel 200) or Figure 4-4 (Octel 300) and remove the cover.
5. Connect the Octel 200/300 to the power source as shown in Figure 4-3 or Figure 4-4 and Figure 4-5.
Connect the positive pole of the power source to the terminal-block position marked “+” and the
negative pole to the position marked “–”.
6. Connect the earth-ground conductor from a suitable building ground to the ground stud next to the
terminal block on the cabinet (refer to Figure 4-3 or Figure 4-4 and Figure 4-5).
7. Secure the cover to the DC filter assembly with the two screws removed in step 4.
8. Turn ON the power to the DCpower-source outlet where the Octel 200/300 has been connected.
9. Turn ON the power switch located on the powersupply unit in the Octel 200/300 cabinet, and verify
proper operation, as discussed in the Octel 200/300 Testing section in this chapter.