Instruction manual

2. Preparation for Installation
107
Figure 2-3 Specifications of the DC power cable (for electrical power equipment)
(1) −48 V (white)
(2) 0V (red)
(3) Ground (green/yellow)
Table 2-16 Specifications of −48 V DC power cable
Cable Type
Cable specifications
Number of core
wires
AWG No.
DC power cable
2
16
Ground cable
1
14
A trained engineer or maintenance staff should connect and disconnect the DC
power cable to and from the electrical power equipment. The terminals of the DC
power cable are connected to the electrical power equipment. Wrong handling of
the DC power cable can cause a fire or an electric shock.
Prior to connecting or disconnecting the DC power cable, turn off the circuit breaker
of the electrical power equipment. Otherwise, an electric shock might result.
Cover the G and −48 V terminals of the DC power cable (on the electrical power
equipment side) with an insulation jacket. Otherwise, an electric shock might result.
For the DC models, make sure to connect the ground cable. Not connecting the
grounded outlet to the switch can cause electric shocks, as well as cause failures
due to electrical noise.
(2) Distribution board
The branch circuit to supply power to the Switch requires circuit breakers or other devices.