Dell EMC PowerEdge MX7000 Quick Start Manual page 4

This document describes the requirements, power and safety ground cable wiring instructions for MX7000 systems equipped
with a -48V DC power supply.
CAUTION:
● This installation should only be done by a certified service technician. You should only perform
troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online
or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered
by your warranty. Read and follow the safety instructions that are shipped with your product.
● Wire the unit in parallel for source and return safety earth grounding with 2 AWG stranded insulated copper
cable only, rated at minimum 105 C.
● Protect the –(48–60) V (1 wire) with a branch circuit over current protection rated 100 A for DC with a high
interrupt current rating.
● Connect the unit to a –(48–60) V DC SELV supply source that is electrically isolated from the AC source.
● Ensure that the –(48–60) V DC source is efficiently secured to earth (ground).
● Ensure that the MX7000 DC chassis is efficiently secured to earth (ground) at both rear wall grounding
locations, using cable created from lug kit #V3NR7.
● Incorporate a readily available disconnect device in the field wiring that is suitably approved and rated.
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