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www.telect.com • © 2011 Telect, Inc., All Rights Reserved, 139249-1 A0
Chapter 5: Connecting the AC Power
5.1 Overview
WARNING
!
WARNING! Commercial power systems present electrical voltage and amperage levels
that are considered an electrical hazard. Make sure that only qualified personnel install,
operate, maintain, or otherwise come in contact with this equipment. Remove all watches
and jewelry before connecting to the power supply. Only use insulated tools when con-
necting to commercial power.
When cabling
•
Neatly secure all cables/conduits in position, and adequately support all wiring to prevent
−
excessive strain on wires and on terminal connections
−
loosening of terminal connections
−
damage of conductor insulation
−
escaped strands of flexible conductor making accidental contact with conductive parts
•
Where cables pass through any part of a metal panel or cover, ensure a cable gland or bush-
ing is fitted in the hole.
•
The cables should fit snugly in the glands without gaps that may allow entry of dust and
insects or other animals.
•
Insulate all neutral conductors from ground.
•
Where possible, do not run AC cables parallel to other nearby DC cables.
•
Maintain adequate segregation between AC cables, DC cables, and low-signal-level alarm/
control wiring, especially where cables enter the rack.
•
Cross sensitive cables (e.g., control cables) at right angles to avoid inductive coupling. This
includes lightning-protection cables that may be on the outside of an adjacent wall.
•
Ensure your cable routing inside the rack does not interfere with access to components and
allows maximum ventilation.
•
Allow a small amount of extra cable (in small loops) for future servicing.
WARNING
!
WARNING! The power system is UL rated at 75 Amps, 240 VAC, and 10kA fault current rat-
ing to power the nrgSMART's DC power plant in the enclosure. Ensure compliance with
local electrical codes and the National Electrical Code when connecting the AC power to
the nrgSMART enclosure, including the use of breakers that are UL489-listed and Square
D QOB3100 or equal.