Magnum Energy RD Series - Manual (Page 22)

Page 16
©
2010 Magnum Energy, Inc.
Installation
Table 2-2, DC Wire Size For Increased Distance (in free air)
Inverter
Model
Minimum Recommended DC Wire Size (one way) *
1-3 feet 3-5 feet 5-10 feet
RD2212 #4/0 AWG (107.16 mm 2 ) #4/0 AWG x2 (107.16 mm 2 ) not recommended
RD1824 #2/0 AWG (67.4 mm 2 ) #2/0 AWG (67.4 mm 2 ) #4/0 AWG (107.16 mm 2 )
RD2824 #4/0 AWG (107.16 mm 2 ) #4/0 AWG (107.16 mm 2 ) #4/0 AWG x2 (107.16 mm 2 )
RD3924 #4/0 AWG (107.16 mm 2 ) #4/0 AWG x2 (107.16 mm 2 ) not recommended
* 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 DC cable ring lug and the battery terminal post or the fl at metal
part of the inverter’s DC terminal. When connecting the DC cable to the battery or inverter DC
terminals, the cable should be placed directly against the inverter or battery terminals. Incorrectly
installed hardware causes a high resistance connection, which could lead to poor inverter/charger
performance and may melt the cable and terminal connections.
Follow the examples in Figures 2-5 and 2-6 to connect the DC cables and stack the hardware
correctly. Tighten the terminal connections from 10 to 12 ft lbf (13.6 to 16.3 N-m).
CAUTION: The DC terminal and 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
(w ith ring lug)
nut
split
w asher
flat
w asher
Battery
T em perature
Sensor
battery
post
C A U T ION:
Ensure nothing is
placed betw een
the cable ring lug
and the battery
post.
5/16 -18"
F lange or
Kep nut
battery cable
(w ith ring lug)
Inverter D C
term inal
(5/16 -18" bolt,
5/8" length)
C A U T ION:
Ensure nothing is
placed betw een
the D C term inal
and the ring lug.