Battery Installation - Generac Power Systems 004709-0 Owner's Manual

2.6.7 GROUND FAULT CIRCUIT
INTERRUPTERS
The National Electrical Code (NFPA 70, 551-7)
requires that ground fault circuit interrupters (GFCIs)
be installed on all external and some internal electri-
cal receptacles. Contact the dealer for recommenda-
tions.
2.7

BATTERY INSTALLATION

2.7.1 RECOMMENDED BATTERY
Install a battery that meets the following require-
ments:
• The battery must be a 12-volt, automotive type
storage battery.
• For prevailing ambient temperatures above 32°
F (0° C), use a battery rated 70 amp-hours and
capable of delivering 400 cold-cranking amperes.
• For prevailing ambient temperatures below 32°
F (0° C), use a battery rated 95 amp-hours and
capable of delivering 400 cold-cranking amperes.
If the battery is to be used to power other vehicle
accessories, as well as start the generator, a bat-
tery with a larger capacity may be needed.
Figure 2.15 – Installation With Isolation Receptacle
NOTE:
Section 2 – Installation
Recreational Vehicle Generator
2.7.2 BATTERY CABLES
Using battery cables that are too long or too small in
diameter may cause a drop in voltage, which causes
starting problems. For the best cold weather starting,
the voltage drop between battery terminals and the
generator connection point should not exceed 0.12
volts per 100 amperes of cranking current.
These generators are rated at about 100 DC amperes
of cranking current.
Select battery cables based on (a) cable length and
(b) prevailing ambient temperatures. Generally, the
longer the cable and the colder the weather, the larger
the cable size must be, as shown in the chart.
CABLE LENGTH
in Feet (Meters)
0 to 10 (0 to 3)
11 to 15 (3.4 to 4.5)
16 to 20 (4.5 to 6)
* For warm weather, use No. 2 cable up to 20 feet.
CABLE SIZE
2*
0
000
31