INSTALLATION INSTRUCTIONS FOR MODEL MBC8 & MBC9 BATTERY CHARGERS
The Charger cabinet must be mounted in a vertical position, preferably on a wall in close proximity to the battery. The areas
above and below the Charger must be clear for at least 12 inches to allow free air flow for cooling. The Charger cabinet
must not be loacted in areas subject to falling or spraying water.
The cabinet should not be subject to shock or vibration. If it is necessary to mount the unit on an engine skid, select a point
subject to the least amount of shock or vibration and install suitable vibration dampers.
The four mounting ears have 5/16 inch holes (or slots) to accept X inch bolts. The horizontal spacing is 10 inches (centers)
and the vertical (center) spacing is 13¼ inches. The unit weight is less than 60 pounds.
For wiring, use wire having insulation which is unaffected by the environment of the installation. For engine starting battery
installations, use flexible stranded copper' wire having insulation which is unaffected by oil or engine heat.
The bushing supplied with the Charger are in 7/8 inch diameter holes for ½ inch nominal conduit fittings. Discard
bushing(s) when conduit(s) is used.
TABLE 1 - LOWER CHASSIS TERMINAL STRIP WIRING
TERMINAL MINIMUM WIRE SIZE
DESIGNATION
GND
As Required
Chassis Ground--Connect to ground wire of a three prong line cord when used. Connect to ground
wire in a conduit wired installation when a wired ground is
required. (The chassis is not insulated from the cabinet).
Nameplate
Input Amperes
AWG
AC-H
1 thru 8 amps #14 A.C. Power Input Terminal (High Side, Fused Side)
9 thru 12 amps
#12 Connect to high side of A.C. supply which has
13 thru 20 amps #10 branch circuit protection capable of supplying
21 thru 30 amps #8
the nameplate listed current requirement.
AC-N
Same as 'AC-H'
A.C. Power Return Terminal Low Side --
Connect to Low or Neutral Side of A.C.
supply.
+B
--Table 2 -- Positive Charge Current Output--Connect to batters
positive terminal.
-B
--Table 2--
Charge Current Return Terminal--Connect to battery
negative terminal.
NOTE: Neither battery output terminal is grounded in the Charger. Therefore, the unit may be used in positive ground,
negative ground, or ungrounded installations.
MBC8/9 (10000)-3
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