Magnum Energy MS-PE Series - Manual (Page 22)

©
2013 Magnum Energy, Inc. Page 15
Installation
Table 2-2, DC Wire Size For Increased Distance
Inverter
Model
Minimum Recommended DC Wire Size (one way)*
1.5 m (5 ft) or less 1.5-3 m (5-10 ft) 3-4.5 m (10-15 ft)
In Conduit In free air In Conduit In free air In Conduit In free air
MS4124PE
107.2 mm 2
(#4/0 AWG)
67.4 mm 2
(#2/0 AWG)
107.2 mm 2 x2
(#4/0 AWG x2)
107.2 mm 2
(#4/0 AWG)
not
recommended
107.2 mm 2 x2
(#4/0 AWG x2)
MS4348PE
67.4 mm 2
(#2/0 AWG)
33.6 mm 2
(#2 AWG)
107.2 mm 2
(#4/0 AWG)
42.4 mm 2
(#1 AWG)
107.2 mm 2 x2
#4/0 AWG x2
53.5 mm 2
#1/0 AWG
* Copper wire rated with 90°C (194°F) insulation at an ambient temperature of 30°C (86°F).
2.4.3 DC Cable Connections
Do not put anything between the battery cable ring lug and the battery post or the fl at metal part
of the inverter’s DC terminal. When connecting the battery cable to the battery post or inverter
DC terminal, the cable should be placed directly against the inverter DC terminal or battery post.
Incorrectly installed hardware causes a high resistance connection, which could lead to poor
inverter/charger performance and may melt the cable and terminal connections.
Refer to Figures 2-5 and 2-6 to connect the DC cables and to stack the hardware correctly. Tighten
the terminal connections from 13.6 to 16.3 N-m (10 to 12 ft lbf).
CAUTION: The DC terminal and Flange/Kep nuts are made of stainless steel, which has
a high likelihood of seizure. To help prevent the bolt and nut from seizing—causing the
bolts to strip or snap/break-off—the use of anti-seize lubricant is highly recommended.
Info: If antioxidant grease or spray is used, apply it after all the connections have
been made and are properly tightened.
Info: A 1/2-inch wrench or socket is used to tighten the 5/16 SAE Kep nuts.
Figure 2-5, Battery Hardware
Installation
Figure 2-6, Inverter DC Hardware
Installation
battery cable
(with ring lug)
nut
split washer
flat washer
Battery
Temperature
Sensor
battery
post
CAUTION :
Ensure nothing is
placed between
the cable ring lug and
the battery post.
5/16 -18"
Flange or
Kep nut
battery cable
(with ring lug)
Inverter DC
terminal
(5/16 -18" bolt,
5/8" length)
CAUTION :
Ensure nothing is
placed between
the DC terminal
and the ring lug.