Dell Online Rack UPS 3750W, Getting Started, Page: 20 / 202

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Installation and Startup
Hardwiring the UPS Input
WARNING:
Only qualified service personnel (such as a licensed electrician) shall perform the electrical
installation. Risk of electrical shock.
The Dell Online Rack hardwired models require a dedicated branch circuit that meets the following
requirements:
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250V/30A, 2-pole circuit breaker (25A for 3750W/230V UPS models) to provide short circuit and
overcurrent protection
S
The protection device requires a two-pole disconnection device between the UPS output and the
load (see Figure 6)
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The breaker must be wall-mounted and be readily accessible to the operator
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For Europe, the breaker must meet the IEC/EN 60934 standard and have a contact air gap of at
least 3 mm
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200–240 Vac
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Single-phase (4200W/208V model is split-phase)
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50/60 Hz
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Flexible metal conduit (recommended for ease of service and maintenance)
AC Mains
Wall
2-pole
Breaker
UPS
Line
Neutral
Figure 6. Circuit Breaker Diagram