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EXTENSION CORDS
1.
Grounded
tools and equipment require a three wire extension cord.
2. 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 and
equipment damage. (See Figure B.)
3. 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.
(See Figure B.)
4. When using more than one extension cord to make up the total length, make
sure each cord contains at least the minimum wire size required.
(See Figure B.)
5. If you are using one extension cord for more than one tool or equipment, add the
nameplate amperes and use the sum to determine the required minimum cord
size. (See Figure B.)
6. If you are using an extension cord outdoors, make sure it is marked with the
suffix “W-A” (“W” in Canada) to indicate it is acceptable for outdoor use.
7. Make 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
electrician before using it. Protect your extension cords from sharp objects,
excessive heat, and damp or wet areas.
RECOMMENDED MINIMUM WIRE GAUGE FOR EXTENSION CORDS*
(120 VOLT)
NAMEPLATE
AMPERES
(At Full Load)
EXTENSION CORD LENGTH
25
FEET
50
FEET
75
FEET
100
FEET
150
FEET
0-2.0
18 18 18 18 16
2.1-3.4
18 18 18 16 14
3.5-5.0
18 18 16 14 12
5.1-7.0
18 16 14 12 12
7.1-12.0
16 14 12 10 -
12.1-16.0
14 12 10 - -
16.1-20.0
12 10 - - -
*Based on limiting the line voltage drop
to five volts at 150% of the rated amperes.
SKU 92775 For technical questions, please call 1-800-444-3353 PAGE 6
FIGURE B