7 Wiring; Wiring Warnings; Wiring Preparation - Tripp Lite SmartOnline SU40K Owner's Manual

7 – Wiring
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DANGER! LETHAL HIGH VOLTAGE HAZARD!
All wiring should be performed by a qualifi ed electrician, in accordance with the warnings in this manual and all applicable
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electrical and safety codes. Incorrect wiring may damage the UPS system severely and cause serious personal injury and
property damage. Read

7-1 Wiring Warnings

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• De-energize all input and output power sources of the UPS system before installing cables or making electrical connections.
• Use flexible cable of sufficient length to permit UPS system servicing. The maximum cable length is 10 m (32.8 ft).
• Use ferrule caps to cover termination cables and prevent frayed ends from shorting on the UPS system terminal block.
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• Use cabling rated VW-1, FT-1 or better.
• Use cable sleeves and connector clamps.
• The neutral conductor must be the same size as the current conductors.
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• Tighten all connections with a torque of at least 3.95 N·m (35 in·lb)
• Confirm that all cables are marked correctly according to their purpose, polarity, phase and diameter.
• If the UPS system's input/output power source is wye-wye, then "Neutral" and "Ground" must not be connected.
• If the input power source has VNG>0, install an isolation transformer before the UPS system and input power source, then connect the UPS
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system's "Neutral" and "Ground" together.
• For equipment requiring a neutral connection to an IT power distribution system, the disconnect device must be a four-pole device and must
disconnect all line conductors and the neutral conductor. If a disconnect device interrupts the neutral conductor, it must simultaneously interrupt
all line conductors.
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• Allow the batteries to charge uninterrupted for 24 hours after the initial wiring connection.
• Observe proper polarity by connecting negative to negative and positive to positive. Failure to observe proper polarity will damage the UPS
system and create a serious risk of personal injury and property damage.
• Observe proper phase by connecting R to R, S to S, T to T and N to N. Failure to observe proper phase will damage the UPS system and create a
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risk of personal injury and property damage.

7-2 Wiring Preparation

• De-energize all input and output (AC and DC) of the UPS system and external battery cabinet (if present).
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• Mark all cables according to their correct purpose, polarity, phase and diameter.
• Review the diagrams in
• Consult the table in Section 7-5
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Note: If the UPS system's input/output power source is wye-wye, then "Neutral" and "Ground" must not be connected. If the input power source
has VNG>0, install an isolation transformer before the UPS system and input power source, then connect the UPS system's "Neutral" and
"Ground" together.
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Section 2 – Important Safety Instructions
Section 7-3 and Section 7-4 to familiarize yourself with the terminal blocks.
to find the correct electrical input/output characteristics for the UPS system.
before proceeding.
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