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SKU 4095 For technical questions, please call 1-800-444-3353. PAGE 8
DOUBLE INSULATED TOOLS: TOOLS WITH TWO PRONG PLUGS
Tools marked “Double Insulated” do not require grounding. They have a special 4.
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.)
Double insulated tools may be used in either of the 120 volt outlets shown in the 5.
following illustration. (See Figure B.)
EXTENSION CORDS
Grounded1. tools require a three wire extension cord. 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 2.
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.)
The smaller the gauge number of the wire, the greater the capacity of the cord. 3.
For example, a 14 gauge cord can carry a higher current than a 16 gauge cord.
(See Figure C.)
When using more than one extension cord to make up the total length, make 4.
sure each cord contains at least the minimum wire size required. (See Figure C.)
If you are using one extension cord for more than one tool, add the nameplate am-5.
peres and use the sum to determine the required minimum cord size. (See Figure
C.)
FIGURE B