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1-6 Ultra Enterprise 6000/5000/4000 Systems Installation Guide—November 1996
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Figure 1-4 IEC 309 Electrical Connector
Note – If the appropriate mating receptacle is not available in your country, the
plug may be removed from the cord. The cord can then be permanently
connected to a dedicated branch circuit by a qualified electrician. Check local
electrical codes for proper installation requirements.
Warning – The system cabinet has a high leakage current to ground. Strictly
observe the following instructions to reduce the risk of electric shock.
The system requires an electrical circuit that is grounded to earth. The UL1950,
CSA950, and EN60950 specify:
An insulated earthing conductor that is identical in size, insulation
material, and thickness to the earthed and unearthed branch-circuit
supply conductors, except that it is green with or without one or
more yellow stripes, is to be installed as part of the branch circuit
that supplies the unit or system. The earthing conductor described
is to be connected to earth at the service equipment or, if supplied
by a separately derived system, at the supply transformer or
motor-generator set.
The attachment-plug receptacles in the vicinity of the unit or
system are all to be of an earthing type, and the earthing
conductors serving these receptacles are to be connected to earth at
the service equipment.
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The power cord provides a ground path that will protect the drives and boards
in the cabinet from static electricity damage.
1. Information TechnologyEquipment —UL 1950, copyright 1989,1991 by UnderwritersLaboratories, Inc.