INSTALLATION INSTRUCTIONS FOR MODEL MBC8 & MBC9 BATTERY CHARGERS
(Continued)
TABLE 1 - LOWER CHASSIS TERMINAL STRIP WIRING (Cont’d)
TERMINAL
MINIMUM WIRE SIZE (COPPER)
DESIGNATION
DK1, DK2
-#24 AWG
Crank Disconnect Relay Input Terminals--Connect to a source of DC voltage equivalent to
the Charger nominal DC voltage rating, when battery is
supplying high current loads such as engine cranking or switch
gear operation to prevent overloading the Charger. Coil
resistance--800 ohms on 12 volt Chargers and 3,200 ohms on
24 volt units.
TABLE 2
BATTERY MINIMUM WIRE SIZES (COPPER WIRE)
CHARGER
WITHOUT REMOTE SENSE
WITH REMOTE SENSE
Rated D.C.
Max Wire Min Wire
Total Loop
Min Wire
Total Loop
Current Run Length
Size Drop
Size Drop
10 FT
16 AWG 0.2V
16 AWG
0.2V
2½ AMP
25 FT16 AWG
0.5V
16 AWG
0.5V
50 FT
14 AWG 0.6V
16 AWG
1.OV
10 FT
16 AWG 0.4V
16 AWG
0.4V
5 AMP 25 FT
14 AWG
0.6V
14 AWG
0.6V
50 FT
12 AWG 0.8V
14 AWG
1.2V
10 FT
12 AWG 0.3V
1'2 AWG
0.3V
10 AMP25 FT
12 AWG
0.8V
12 AWG
0.8V
50 FT
8 AWG
0.6V
10 AWG
1.OV
10 FT
10AWG
0.4V
IOAWG
0.4V
20 AMP25 FT
8 AWG
0o6V
10 AWG
1.OV
50 FT
6 AWG
0.8V
8 AWG
1.2V
Note that while the wire size shown for the AC wiring is based on wire current carrying capacity ('ampacity'), the wire sizes
shown for the battery wiring are based on wiring resistance. In addition, splices or junctions in the wiring path must be low
in resistance.
Runs may be two of the next smaller even wire size, e.g. two #12 AWG wires may be used in place of a #10 AWG wire,
etc. Aluminum wire NOT recommended.
MBC8/9(1 0000)-3
2-
