Magnum Energy MS Series - Manual (Page 31)

Page 22
©
2012 Magnum Energy, Inc.
Installation
CAUTION: Ground Fault Circuit Interrupters (GFCIs) shall be installed in the
recreational vehicle wiring system to protect all branch circuits.
2.5.4 AC Terminal Block Connections (MS2012, MS2812, and MS4024)
The MS2012, MS2812, and MS4024 models have a six-pole AC terminal block and one AC ground
terminal to connect the inverter’s AC input and output wiring. This terminal block (see Figure 2-8)
allows a service/distribution panel (main panel) to be wired to the inverter’s input, and also allows
a dedicated panel (sub-panel) between the inverter’s output wiring and the AC loads. To access
and view the AC terminal block and ground terminal, remove the two Phillips screws holding the AC
wiring access cover plate (see Item 15, Figure 1-3).
Each connection on the AC terminal block is rated to accept one #14 to #6 AWG (2.1 to 13.3 mm
2 ) CU
stranded wire, or two #12 AWG (3.3 mm 2 ) CU stranded wires. Each connection uses a M3.5 slotted
head screw, and the maximum tightening torque is 16 lbf-in (1.8 N-m).
Info: One of the AC wiring confi gurations [SI/SO (60A), Figure 2-10] uses a #6 AWG
wire to carry 60 amps, and splits to two wires to allow 30 amps for each leg (i.e., AC
HOT 1 and AC HOT 2). IDEAL Industries Inc. (www.idealindustries.com) manufactures
a crimp connector (PN: 412) and a separate insulator (PN: 417) that allow up to two
#8 AWG wires – with one #6 AWG wire to be connected together.
Info: To comply with ABYC requirements for marine installations, the AC terminal has
a stainless steel wire protector to prevent wire damage from the set-screw.
Info: The inverter’s NEUT IN and NEUT OUT terminals are electrically isolated from
each other while inverting. This is related to the neutral-ground bonding requirement
and helps prevent ground-loops (see Section 2.6.5 for more information). If the
installation requires the input and output neutrals to be connected together, the
inverter’s neutral-to-ground connection must be disconnected (see Section 2.6.5).
The AC ground terminal can accept one #14 to #6 AWG (2.1 to 13 mm 2 ) CU stranded wire. It uses
a slotted head screw and has a recommended maximum tightening torque of 45 in lbf (5.1 N-m).
For multiple ground wires, use a pressure or mechanical connector to attach the single wire from
the AC ground terminal to the input and output ground connections.
Figure 2-8, AC Terminal Block
AC GROUND
(In & Out)
NEUT IN
HOT 1 IN
HOT 2 IN HOT 1 OUT
HOT 2 OUT
NEUT OUT
2.5.3 Recommended GFCI (Ground Fault Circuit Interruption) Outlets
In compliance with UL standards, Magnum Energy has tested the following GFCIs and fi nd that
they function properly when connected to the inverter’s AC output:
• Shock
Sentry TM #XGF15V-SP • Leviton Smart Lock #8899-A • Hubbel #GF520EMBKA