3Com External PoE Power System PSE2500-A3 - Manual (Page 21)

User Manual
PSE2500-A3 External PoE
Power System
Chapter 3 Safety
3-4
z Lock out and tag any circuit breakers/fuses when possible to
prevent accidental turn on.
z Be aware of potential hazards before servicing equipment.
z
Identify exposed hazardous electrical potentials on
connectors or, wirings. (Note the condition of these circuits,
especially any wiring).
z Be careful when removing or replacing any covers – avoid
contacting any circuits.