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4.3 An extension cord should not be used unless absolutely necessary. Use of
an improper extension cord could result in a risk of re and electric shock.
If an extension cord must be used, make sure:
a. That the pins on the plug of extension cord are the same number, size,
and shape as those of the plug on charger;
b. That the extension cord is properly wired and in good electrical
condition;
c. That the wire size is large enough for AC ampere rating of the charger
as specied in the following table.
Recommended minimum AWG size for extension cords
for battery chargers
AC Input rating, Amps AWG size of cord
Equal to or
greater than
But less than
Length of cord, feet (m)
25 50 100 150
(7.6) (15.2) (30.5) (45.6)
0 2 18 18 16 16
2 4 18 16 12 10
4 6 16 14 10 8
6 8 16 12 10 8
8 10 14 12 8 6
10 12 14 12 8 6
12 14 14 10 8 6
5. CHARGER LOCATION
5.1 Locate the charger as far away from the battery as the charger cables
permit.
5.2 Never place the charger directly above the battery being charged; gases
from the battery will corrode and damage charger.
5.3 Never allow the electrolyte to drip on the charger when taking gravity
readings or lling a battery.
5.4 Operate the charger only in well ventilated area, free of dangerous vapors.
5.5 Store the charger in a safe, dry location and maintain it in perfect condition.
5.6 Do not set the battery on top of charger or where acid might drip onto
charger.