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INSTALLATION FOR STAND-BY USE
Precautions must be taken to prevent electrical back feeding into
utility systems. This requires isolation of the electrical system. To
isolate the electrical system, perform the following procedures:
1. Turn off the main electrical system switch prior to
connecting the unit.
2. In accordance with national and local standards, a double
throw transfer switch must be installed in the system.
Always shut off main power prior to temporary
connection of the unit to a building electrical
system.
Installation of the unit as a backup electrical
source must be performed by a qualified
(licensed or certified) electrical technician.
GR3000
Generator Operation (Continued)
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TABLE 3 - WELDING CABLES
Total Cable Length * 0 - 20 feet (0 - 6 m) 20 - 40 feet (6 - 12 m) 40 - 60 feet (12 - 18 m)
Maximum Welding Current Recommended Sizes of Copper Welding Cables
100 A 6 AWG (16 mm
2
) 6 AWG (16 mm
2
) 4 AWG (25 mm
2
)
150 A 6 AWG (16 mm
2
) 4 AWG (25 mm
2
) 2 AWG (35 mm
2
)
200 A 6 AWG (16 mm
2
) 4 AWG (25 mm
2
) 2 AWG (35 mm
2
)
250 A 6 AWG (16 mm
2
) 2 AWG (35 mm
2
) 1 AWG (50 mm
2
)
* Total cable length is the sum of the ground and electrode cable lengths.
TABLE 2 - EXTENSION CORDS
Maximum Recommended Lengths (in feet)
Amps Watts 120 V Watts 240 V #8 Wire #10 Wire #12 Wire #14 Wire #16 Wire
2.5 300 600 1000 600 375 250
5 600 1200 500 300 200 125
7.5 900 1800 350 200 125 100
10 1200 2400 250 150 100 50
15 1800 3600 150 100 65
20 2400 4800 175 125 75 50
25 3000 6000 150 100 60
30 3600 7200 125 65
40 4800 9600 90
TABLE 1 - ESTIMATED POWER USAGE (WATTS)
LOAD DEVICE WATTS LOAD DEVICE WATTS
Bench grinder
(8 in)
1400-2500 Electric fry pan 1500
Coffee maker 400-700 Fan 40-200
Electric drill
(3/8 inch,
4 amps)
440-600 Circular saw
(Heavy duty
7-1/4 inch)
1400-2300
Electric drill
(1/2 inch,
5.4 amps)
600-900 Table saw
(10 inch)
1800-4500
LOAD DEVICE WATTS LOAD DEVICE WATTS
Radio 50-200 Window air
conditioner
1500-2200
Refrigerator or
freezer
130-1200 Microwave
oven
1000-1500
Sump pump 800-2200 Water pump 1000-3000
Television 200-500 Water heater 1000-5000
Light bulb AS RATED Space heater 600-4800