Double Insulated Tools: Tools
with Two Prong Plugs
1.Tools 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 Labora- tories, Inc., the Canadian Standard Association, and the National Electri- cal Code. (See Outlets for
Plug.)
2.Double insulated tools may be used in either of the 120 volt outlets shown in the preceding illustration. (See
Outlets for 2-Prong Plug.)
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 exten- sion cords with inadequately sized wire causes a serious drop in voltage, resulting in loss of power and pos- sible tool damage.
(See Table A.)
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 Table A.)
4.When using more than one exten- sion cord to make up the total length, make sure each cord contains at least the minimum wire size required.
(See Table A.)
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 Table A.)
6.If you are using an extension cord outdoors, make sure it is marked with the suffix
7.Make sure the extension cord is prop- erly wired and in good electrical con- dition. Always replace a damaged extension cord or have it repaired by a qualified electrician before using it.
8.Protect the extension cords from sharp objects, excessive heat, and damp or wet areas.
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