Mac Victor 2.0 Installation Operation Manual 042408.pdf - © 2008 Mac Victor Power, LLC.
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2 – PRODUCT OVERVIEW
2.1 Operating Schematic
The above Mac Victor 2.0 Operating Schematic provides a conceptual diagram of the system operation and does
not represent an actual wiring diagram. See Section 2.4 for a Description of Operation.
2.2 Theory of Operation
Isolated Ground (hereafter IG) receptacles (identified by their orange color or an orange triangle) are used with
critical electronic systems to provide a separate, isolated ground reference point (for data communication and
logic) from the safety or equipment ground required to protect the circuit from over current faults.
Typically, the IG conductors are run back to the electrical main service entrance grounding terminal of the
facility, which can result in electrical disturbances on the IG conductor caused by induced voltages from other
parallel conductors run in the same conduits, raceways and panelboards. This practice can effectively defeat the
purpose of the IG receptacles by injecting electrical noise onto the IG conductor.
The National Electrical Code (NEC) allows for an alternative IG grounding method through the use of a “separately
derived system” such as an isolation transformer that allows for the re-establishment of the Neutral to Ground
bond on the output wiring. This Neutral to Ground bond, also known as a newly derived Neutral, provides an
acceptable location to terminate the IG conductor in lieu of wiring back to the main service entrance grounding
terminal.
The Mac Victor 2.0 constitutes a “separately derived system” because of the internal, low impedance, isolation
transformer that has the Neutral and Ground output wiring bonded together. All the conductors associated with
the installation of IG receptacles (Line, Neutral, Ground, Isolated Ground) are designed to terminate at the Mac
Victor 2.0 which is also designed to interface with plug and receptacle connections with the Uninterruptible Power
Supply (UPS) that provides battery backup for the network.
The Mac Victor 2.0 therefore provides a centralized system with both “clean” isolated ground power and battery
backup power for critical electronic networks in addition to many other operational and maintenance benefits.
Figure 2.1
