User's Manual

Chapter 2. Prior to Installation
22
Safety Precautions, Continued
• LOCAL POWER AC SOURCE
• Safety requirements require a single pole circuit-breaker to be
employed between the local power AC source and StreetNode
TM
6250
PTP (for AC direct powering) or AC power injector.
• The circuit breaker must disconnect the mains phase of the AC power.
• LOCAL POWER DC SOURCE
• Safety requirements require a single pole circuit-breaker to be
employed between the local power DC source and StreetNode
TM
6250
PTP (for DC direct powering) or DC power injector.
• The circuit-breaker must control (open / close) the negative (-) V pole of
the power supply.
• The positive pole of the local power source must be grounded.
For circuit breaker requirements please refer to Circuit breakers on page 28.
• POWER SUPPLY CABLES (AC/DC)
• Power source cables must be tested for short circuits, open circuit or
wrong wiring before installed.
• The ground wire of the AC power source cable must be connected to
the protective earth (ground) point of the mains electricity installation.
AC or DC Power PROPER SWITCHING ON / OFF
Never connect or disconnect the power cable to or from the radio unit as well
as the power injector when the local power supply sources (AC or DC) is
ON.
There is risk of equipment failure.
Continued on next page