Magnum Energy MM Series Owner's Manual

Also see for MM Series: Installation and operation guide Installation and operation guide

Contents

Magnum Energy MM Series Owner's Manual Manual pdf 23 page image

© 2010 Magnum Energy, Inc.Table 3, Wire Color to AC Wire ConnectionWire color (label) Wire connectionBlack (HOT IN) Hot InWhite (NEUT IN) Neutral InRed (HOT OUT) Hot OutWhite with blackstripe (NEUT OUT) Neutral OutAC Ground Green (GROUND) AC IN and AC OUT GroundAC INAC OUTNeutral to Safety Ground BondingElectrical safety standards for wiring mobile (RV, boat, or truck)installations require the AC source (inverter, shore power, or a generator)to have the neutral conductor tied to ground. These standards alsorequire that the AC neutral be connected to safety ground in only oneplace at any time (often called a “bond”). If more than one bond isestablished, currents can circulate between neutral and ground and causeground-loop currents. These “ground-loops” can trip GFCIs and cause anelectric shock hazard.In mobile installations there may be multiple AC sources, which meansthere is the potential of having multiple neutral to ground connections.Therefore, you must ensure that the inverter does not also connectneutral-to-ground while the other AC source is powering the inverterloads. While inverting, the MM inverters use an internal relay thatautomatically connects the AC neutral output terminal to the vehicle/boat’s ground. However, when an external AC source is connected,another neutral-to-ground connection is introduced in the system. Whenthe MM Series is connected to this external AC source, the internal relayautomatically opens the neutral-to-ground connection. This design keepstwo neutral-to-ground connections from occurring at the same time.AC Wiring ConnectionsFor all hardwired inverter models, the AC input and output wiring is per-formed in the AC wiring compartment. This compartment is located onthe top panel (see Figure 2, Item 8). If installed, remove the two Phillipsscrews on the cover to access the AC wiring compartment and locate theinverter’s AC wiring. There is a label located in the AC access compart-ment with information on which wires are used for the AC input and out-put. You can also refer to Table 3 to match the inverter’s AC wires to theappropriate AC wire connection.AC WiringThis section describes the required AC wire size and the overcurrentprotection needed. It also provides information on how to make the ACconnections.172.0 Installation