EXTENSION CORDS
Double insulated tools can use either a two or three wire extension cord. As the distance from the supply outlet increases, you must use
a heavier gauge extension cord. Using extension cords with inadequately sized wire causes a serious drop in voltage, resulting in loss of
power and possible tool damage.
The smaller the gauge number of the wire, the greater the capacity of the cord. For example, a 14-gauge cord can carry a higher current
than a 16-gauge cord. When using more than one extension cord to make up the total length, be sure each cord contains the minimum
wire size required. If you are using one extension cord for more than one tool, add the warning label amperes and use the sum to
determine the required minimum wire size. Refer to the table below to determine the required minimum wire size.
Guidelines for Using Extension Cords
If you are using an extension cord outdoors, be sure it is marked with the suffix "W-A" ("W" in Canada) to indicate that it is acceptable for
outdoor use.
Nameplate
Amperes
0 - 5
5.1 - 8
8.1 - 12
12.1 - 15
15.1 - 20
* Based on limiting the line voltage drop to five volts at 150% of the rated amperes.
Be sure your extension cord is properly wired and in good electrical condition. Always replace a damaged extension cord or have it
repaired by a qualified person before using it.
Protect your extension cords from sharp objects, excessive heat, and damp or wet areas.
Recommended Minimum Wire Gauge for Extension Cords*
25'
50'
16
16
16
16
14
14
12
12
10
10
EXTENSION CORD LENGTH
75'
100'
16
14
14
12
12
10
10
10
10
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4
150'
200'
12
12
10
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