Hitachi GR4000 Series Safety Manual page 8

Hitachi GR4000/GS4000 Series Routers and Switches Safety Guide
Do not use a power source or voltage that exceeds the specifications of the
GR4000 or GS4000. Observe the instructions on the device chassis.
The current capacity of a distribution panel must be greater than that of the
operating current fed to the circuit breaker. If not, the circuit breaker may not
work properly when a circuit abnormality is detected. This condition could cause
a fire.
Because DC power cables are connected using screw terminals instead of plugs,
attaching or removing a DC power cable to or from the device must be done by a
trained maintenance person. Mishandling DC power cables can cause a fire or an
electric shock.
Make sure that the circuit breaker of a power facility is set to OFF before
attaching or removing a DC power cable. Attaching or removing a DC power cable
with the circuit breaker set to ON will cause an electric shock.
When replacing a power supply or installing an additional one, remove the power
cable from the power supply to be replaced. Even if the power switch is turned
4 GR4K-GA-0001
Rev. 1.20