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 24 page image

© 2010 Magnum Energy, Inc.2.0 Installation18The AC wires inside the AC compartment are #16 AWG with a tem-perature rating of 105° C, all AC connections should be made using anapproved connector for your application (e.g., split bolt, twist-on wireconnectors, etc.). Ensure the wire connectors used are rated for thesize and number of wires you are connecting.After connecting the wires together, gently pull on the wires to ensurethey are securely held together. In a proper connection, no bare wireshould be exposed.Info: Per UL certification, non-metallic sheathed cable (i.e.,Romex™) or a SO flexible cord with listed strain reliefsare allowed to be used to connect to the inverter; conduitconnections are not allowed.AC Wire Size and Overcurrent ProtectionThe AC input and output wiring must be sized per the NEC and lo-cal electrical safety code requirements to ensure the wire’s ability tosafely handle the inverter’s maximum load current. After determiningthe proper AC wire sizes, the inverter’s AC input (unless you are usinga flexible cord) and output wires are required to be protected againstovercurrent and have a means to disconnect the AC circuits.Overcurrent protection must be provided by fuses or circuit-breakers,and must be properly sized and rated for the wire they are protectingand the appliances being powered.An external disconnect device is required for both the AC input and ACoutput wiring. Most inverter’s that are “hardwired” use a service/distri-bution panel wired to the inverter’s input (main panel), and a dedicat-ed panel between the inverter’s output wiring and the AC loads (sub-panel). These systems use the circuit breakers provided in the panelsas the overcurrent protection and the AC disconnect. If fuses are used,then separate AC disconnect switches will be needed.Based on information from the NEC, Table 4 provides the minimum ACwire size and the suggested breaker size based on the inverter model.However, larger wire size may be required because of voltage drop.The AC wire sizes provided in this table assume using only copper wireand a temperature rating of 75° C or higher. A minimum of #14 AWGis required for all AC wiring.After all AC wiring in the inverter is complete — prior to reattachingthe AC access cover — review all wiring to ensure all connections arecorrect and secure.Table 4, Minimum Wire Size to Circuit-breaker SizeInverterModelAC Input AC OutputInputBreakerMinimumWire SizeSuggestedBreaker SizeOutputBreakerMinimumWire SizeSuggestedBreaker SizeMM612 7 amps #14 AWG 10 amps 8 amps #14 AWG 10 ampsMM1212 20 amps #12 AWG 20 amps 12 amps #14 AWG 15 amps