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T640 AC Power Electrical Safety Guidelines

 

The following electrical safety guidelines apply to an AC-powered T640 or T1600 router with three-phase AC power supplies:

  • AC-powered routers are shipped with three-phase electrical cords with grounding. Do not circumvent this safety feature. Equipment grounding must comply with local and national electrical codes.

  • For each three-phase delta AC power supply. you must provide an external listed customer site circuit breaker rated minimum 40 A (240 VAC) in the building installation, or as required by local code.

  • For each three-phase wye AC power supply. you must provide an external listed customer site circuit breaker rated minimum 25 A (415 VAC) in the building installation, or as required by local code.

  • The delta cores in the mains lead are labeled as follows:

    • Wire labeled GND—Earth

    • Wire labeled L1

    • Wire labeled L2

    • Wire labeled L3

  • The wye cores in the mains lead are labeled as follows:

    • Wire labeled GND—Earth

    • Wire labeled L1

    • Wire labeled L2

    • Wire labeled L3

    • Wire labeled N

Caution

For Juniper systems with AC power supplies, an external surge protective device (SPD) must be used at the AC power source.