Magnum Energy MMS1012 Owner's Manual

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Magnum Energy MMS1012 Owner's Manual Manual pdf 28 page image

© 2010 Magnum Energy, Inc.AC Input WiringYour inverter has an AC transfer feature that passes the AC inputpower to the inverter’s output. Connection to the AC input is madeby hardwiring from a distribution panel as described below:1. Run an appropriately sized 2-conductor plus ground cable (fromthe AC distribution panel) through the strain relief clamp on the ACIN opening (Figure 3, Item 10). Refer to Table 4 for minimum wiresize and overcurrent protection required for the AC input wiring.2. Remove about two inches of the insulating jacket from the ACcable, and then separate the three wires and strip about 3/4” ofinsulation from each wire.3. Using approved AC wire connectors, connect the incoming HotIn, Neutral In, and Ground wires to the MMS Series’ AC wirescolored black (HOT IN), white (NEU IN), and green (AC GROUND)respectively.4. After making the AC input connections, secure the AC input cableby tightening the strain relief clamp.The AC input wiring in the inverter is complete. Review all AC wiringto ensure all connections are correct and secure.Table 4, Minimum Wire Size to Circuit-breaker SizeAll inverter AC input and output wiring is required to be protected by anovercurrent protection device. Overcurrent protection must be providedby fuses or circuit-breakers, and must be properly sized and rated forthe wire they are protecting and the appliances being powered.Most inverter’s that are hardwired use a service/distribution panelwired to the inverter’s input (main panel), and a dedicated panelbetween the inverter’s output wiring and the AC loads (sub-panel).These systems use the circuit breakers provided in the panels as theovercurrent protection and the AC disconnect. If fuses are used, thenseparate AC disconnect switches will be needed.Based on information from the NEC, Table 4 provides the minimumAC wire size and the suggested breaker size based on the invertermodel. However, a larger wire size may be required because of volt-age drop. The AC wire sizes provided in this table assume using onlycopper wire and a temperature rating of 75° C or higher. A minimumof #14 AWG is required for all AC wiring.InverterModelAC Input AC OutputInputBreakerMinimumWireSizeSuggestedBreakerSizeOutputBreakerMinimumWireSizeSuggestedBreakerSizeMMS1012 20 amps #12 AWG 20 amps 15 amps #14 AWG 15 ampsMMS1012-G 20 amps #12 AWG 20 amps 15 amps #14 AWG 15 amps222.0 Installation