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Electrical Installation: Typical UPS Wiring Principle
8 Symmetra MW 1000 kW 480 V Installation - 990-4112E
External disconnection switches
Input/Output wiring precautions
WARNING!
The UPS has no internal manual disconnect devices to switch off external AC (Q1
and Q5) and DC (Q7 and Q8) input power. Ensure that disconnection devices are
available as separate components for this installation.
Note
The installer must provide each external disconnection device for this UPS system with
labels displaying the following text:
“Isolate the Uninterruptible Power Supply (UPS) as instructed in the User Guide before
working on circuit.”
WARNING!
Only personnel trained in the construction and operation of the equipment, and the
electrical and mechanical hazards involved, may install or remove system
components.
WARNING!
Supply the UPS from a dedicated, grounded, 3-wire Wye service.
CAUTION!
All wiring must be in accordance with applicable national and/or local electrical codes.
Note
Use only UL-approved cable lugs.
Note
Use only UL-approved cables. Use only stranded copper conductors. Refer to National
Electric Code for wiring and protection. Refer to bolt and lug table in the
“Specifications” section.