Harbor Freight Tools 93781 - Manual (Page 5)

SKU 93781 For technical questions please call 1-800-444-3353. Page 5
dOUBLE INSULATEd APPLIANCES: APPLIANCES WITH TWO PRONG PLUGS
Note: The Battery Charger has a Two Prong Plug.
1. Appliances marked “Double Insulated” do not require grounding. They have a special double
insulation system which satisfies OSHA requirements and complies with the applicable
standards of Underwriters Laboratories, Inc., the Canadian Standard Association, and the
National Electrical Code. (See Figure B.)
2. Double insulated tools may be used in either of the 120 volt outlets shown in the following
illustration. (See Figure B.)
Figure B
EXTENSION CORdS
1. Grounded appliances require a three wire extension cord. Double Insulated products 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, next page.)
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.)
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 C.)
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.)
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.