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5 – Installation
continued
5.5 Wiring Input Power
Warning: Before wiring the 3-phase UPS to the Distribution Center's main breaker, turn the UPS OFF and de-energize it completely.
The main breaker accepts wiring up to 300 MCM. Recommended minimum wiring sizes are shown below, but the electrician must make the final
wiring determination for your configuration in compliance with NEC and all other applicable electrical and safety regulations. The electrician may wish
to refer to Tripp Lite's 3-Phase Domestic Site Planning Data Sheet, downloadable at www.tripplite.com.
Input power to the Distribution Center's main input must be 3-phase, 4 wire + ground from a 120/208V 3-phase source. The use of ferrules on stranded
wire is recommended.
3-Phase UPS Capacity
20kVA
30kVA
40kVA
60kVA
>60kVA
*Conductors Rated 90°C
Raised Floor
• Run the wiring from the 3-phase power source, under the raised floor and up through the open base of the Distribution Center.
• Use the center-bottom conduit knockout of the breaker box below the main circuit breaker to attach the input flexible conduit.
• Wire the 3-phase power source to the bottom of the main input breaker, neutral and ground.
Concrete Floor
• Run the wiring from the 3-phase power source through the bottom side panel of the Distribution Center. The side panel has two knockouts to
accommodate the wiring—choose the most convenient knockout. Note: You can install the side panel in the lower position on either side of the
Distribution Center to accommodate the placement of the 3-phase power source.
• Use the center-bottom conduit knockout of the breaker box below the main circuit breaker to attach the input flexible conduit.
• Wire the 3-phase power source to the bottom of the main input breaker, neutral and ground.
Note: To maintain same-phase rotation within the panel board as output from the AC source, connect the R, S and T phases (also known as A, B and
C phases) to the main circuit breaker lugs from left to right.
5.6 Powering Up
• Turn the AC source (UPS system) ON, following all normal start-up procedures for the AC source.
• Turn the Distribution Center's MAIN breaker ON. Warning! After you turn the main breaker ON, the breaker box will be energized.
• Verify that voltages from phase-phase are 208V (NOM), phase-neutral are 120V (NOM) and neutral-ground is 0V.
• Reattach the breaker box front panel.
• Close the Distribution Center's front door.
• Plug PDUs into the cord sets as required to power your equipment.
• Turn the output branch circuit breakers ON. Warning! After you turn the output branch circuit breakers ON, the cord sets and anything
plugged into the cord sets will be energized.
5.7 Powering Down
• To power down the entire Distribution Center, turn OFF the main breaker. Warning! The UPS system wiring will remain energized until you turn
the UPS system OFF.
• To power down an output branch circuit, turn OFF the corresponding output branch circuit breaker. Warning! The breaker box will remain
energized until you turn the main breaker OFF.
Recommended Minimum Wire Size*
6 AWG
3 AWG
1 AWG
000 AWG
Not Supported - Do Not Connect
11
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