AMX UPC20 Plus Operation/Reference Manual page 3

UPC20+ Wiring Requirements
In the United States, the UPC20+ must be wired by an authorized electrician in
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accordance with the National Electrical Code, ANSI/NFPA 70-1987, as well as all
local codes.
In the European community, the UPC20+ unit must be wired by an authorized elec-
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trician in accordance with all applicable European codes.
A readily accessible disconnect device shall be incorporated into the fixed wiring.
An insulated earthing conductor that is identical in size, insulation material and
thickness to be 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 which supplies the unit or system. The earthing conductor
described is to be connected to earth at the service equipment, or supplied by a
separately derived system, at the supply transformer or motor generator set.