State Master Controls Model number
A.C. input voltage frequency and phase
Number and type of battery cells
Specific gravity of lead acid batter(y
Ampere Hour Capacity of Battery
Continuous D.C. load
Allowable Recharging Time from full discharge
(* ) Add Suffix (LA) to model number when charger is for use with automotive lead acid batteries having 1.265-1.285 sp. gr.
(* ) Add Suffix (FL) to model number when charger is for use with float service lead acid batteries having 1.200-1.200 sp. gr
(* ) Add Suffix (NC) to model number when charger is for Nickel Cadmium Batteries.
NOTE: Battery manufacturers recommend that the equalizing current be not less than C/20 with C
representing the ampere hour capacity of the battery. As an example, a 200 ampere hour battery would
require a charger having a rated current of 10 amperes.
The charger output recommendations outlined in the above table should be followed to assure proper
system operation and reasonable operating life of the charger and batteries.
The battery charger shall be a Master Control Model
MBC8 or approved equal. The charger shall have an
output rating of at least 1/20 of the rated ampere hour
capacity of the battery to which it is applied and be
capable of carrying continuous loads up to 100% of its
rated output. The charger shall have two ranges
(equalize and float). Voltage settings for both ranges
shall be factory preset for the specific battery type and
shall not be field adjustable. It shall maintain its rated
output voltage within ± 1% with A.C. input variation of ±
10%. Output voltage regulation between no load and full
load shall be within ± 1%.