Schumacher Electric SP1 Owner's Manual page 8

7. FOLLOW THESE STEPS WHEN BATTERY IS OUTSIDE
OF VEHICLE.
7.1
Check the polarity of the battery posts. The POSITIVE (POS, P, +)
battery post usually has a larger diameter than the NEGATIVE
(NEG, N, -) post.
7.2 Attach at least a 24-inch (61 cm) long 6-gauge (AWG) insulated
battery cable to the NEGATIVE (NEG, N, -) battery post.
7.3 Connect the POSITIVE (RED) charger clip to the POSITIVE
(POS, P, +) post of the battery.
7.4 Position yourself and the free end of the cable you previously
attached to the NEGATIVE (NEG, N, -) battery post as far away
from the battery as possible – then connect the NEGATIVE
(BLACK) charger clip to the free end of the cable.
7.5
Connect charger AC supply cord to electrical outlet.
7.6 When disconnecting the charger, always do so in the reverse
order of the connecting procedure and break the first connection
while as far away from the battery as practical.
7.7
A marine (boat) battery must be removed and charged on shore.
To charge it onboard requires equipment specially designed for
marine use.
8. GROUNDING AND AC POWER CORD CONNECTIONS
plug pins must fit the receptacle (outlet). Do not use with an
ungrounded system.
A SPARK NEAR THE
BATTERY MAY CAUSE A
BATTERY EXPLOSION.
TO REDUCE THE RISK
OF A SPARK NEAR THE
BATTERY:
RISK OF ELECTRIC SHOCK OR FIRE.
8.1 This battery charger is for use on
a nominal 120-volt circuit. The plug must
be plugged into an outlet that is properly
installed and grounded in accordance
with all local codes and ordinances. The
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