Approximate Starting
Wattage
Approximate Running
Wattage
Electric Fence, 25 miles
250
250
Milk Cooler
1800
1100
Milker (vacuum pump,
2hp)
2300
1000
Portable Heater (kerosene, diesel fuel)
50,000 BTU
600
400
90,000 BTU
725
500
150,000 BTU
1000
625
Battery Charger
15 amp
380
380
60 amp with 250-amp
boost
1500/5750
1500/5750
Farm Equipment
VOLTAGE DROP IN ELECTRIC EXTENSION CORDS
When a long electric extension cord is used to connect an appliance or tool to the
generator, a certain amount of voltage drop or loss occurs in the extension cord
which reduces the effective voltage available for the appliance or tool.
The chart below has been prepared to illustrate the approximate voltage loss when
an extension cord of 300 feet (approx. 100 meters) is used to connect an
appliance or tool to the generator.
Nominal
cross
section
A.W.G.
Allowable
current
No.of strands
/ strands dia. Resistance
Current Amp.
No./mm
Ω
/100m
mm
2
No.
A
1A
3A
5A
8A 10A 12A 15A
0.75
18
7
30/0.18
2.477
2.5V 8V 12.5V
─
─
─
─
Voltage drop
1.27
16
12
50/0.16
1.486
1.5V 5V 7.5V 12V 15V 18V
─
2.0
14
17
37/0.26
0.952
1V
3V
5V
8V 10V 12V 15V
3.5
12 to 10
23
45/0.32
0.517
─
1.5V 2.5V 4V
5V 6.5V 7.5V
5.5
10 to 8
35
70/0.32
0.332
─
1V
2V 2.5V 3.5V 4V
5V
19
