Installation Guide

Table Of Contents
Connecting the X250e or X450a DC Wiring Harness to the DC Source Voltage
A three-wire, six-foot long DC wiring harness is included with each Summit X250e or X450a DC-
powered switch.
The DC wiring harness must be properly connected to the DC source voltage at your facility by a
qualified electrician before you attach the connector on the wiring harness to the DC power supply
socket on the switch. Figure 260 on page 331 shows the wiring harness and connector. For information
about the wire-to-pin connection, see Table 518 on page 650 and Table 525 on page 653.
Warning
The Summit DC-powered switch and rack must be connected to protective earth ground
before installing any switch components. See Grounding a Summit X250e or X450a DC-
Powered Switch on page 329.
A qualified, licensed electrician is required to wire the DC input power harness to your
facility's DC source voltage. After the wiring harness is connected, you can remove, replace,
and maintain a Summit DC-powered switch without further assistance from an electrician.
However, always be sure that the DC circuit is de-energized before connecting or
disconnecting the DC power connections at the rear of the switch.
Caution
The DC wiring harness must be properly connected to a DC main circuit breaker rated no
greater than 20 A.
Provide proper connection and strain relief on the DC wiring harness in accordance with all
local and national electrical codes.
Figure 260: Three-wire Cable Harness
Note
Each wire on the harness has been properly marked for proper attachment to the DC power
source. Leave these labels on each lead wire for future reference.
After the DC wiring harness has been connected to the DC power source, follow the instructions in
Attaching the DC Wiring Harness to the DC Power Socket on the Switch on page 331.
Attaching the DC Wiring Harness to the DC Power Socket on the Switch
After the DC wiring harness has been connected to a permanent DC voltage source by a qualified,
licensed electrician (see Connecting the X250e or X450a DC Wiring Harness to the DC Source Voltage
on page 331), you can remove, replace, and maintain a Summit DC-powered switch without further
Installing Switches
Connecting DC-Powered Switches to a Power Source
Summit Family Hardware Installation Guide 331