Extension cords – Harbor Freight Tools ROTARY HAMMER 94944 User Manual
Page 7
SKU 94944
PAGE 7
EXTENSION CORDS
1.
Grounded tools require a three wire extension cord. Double Insulated tools
can use either a two or 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 damage.
(See Figure C)
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 C, and Figure D.)
4.
If using more than one extension cord to make up the total length, make sure
each cord contains at least the minimum wire size required.
5.
If you are using one extension cord for more than one tool, add the nameplate
amperes and use the sum to determine the required minimum cord size.
(See Figure C, and Figure D.)
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.
8.
Protect your extension cords from sharp objects, excessive heat, and damp or
wet areas.
FIGURE C
RECOMMENDED MINIMUM WIRE GAUGE FOR EXTENSION CORDS*
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
18
14
12
10
-
12.1 - 16.0
14
12
10
-
-
16.1 - 20.0
12
10
-
-
-
FIGURE C
* Based on limiting the line voltage drop to five volts at 150% of the rated amperes.