*Based on limiting the line voltage drop to five volts at 150" of the rated amperes.
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. When using more
than one extension on cord to make up the total length, be sure each cord contains at
least the minimum wire size required. 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 wire
Guidelines for Using Extension Cords
If you are using an extension cord outdoors, be sure it is marked with the
suffix "W-A" ("W" in Canada) to indicate that it is acceptable for
Be 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 person before
Protect your extension cords from sharp objects, excessive heat, and damp or wet
(Grounded Tools: Tools with Three Prong Plugs )
Tools marked "Grounding Required' have a three wire cord and three prong
grounding plug. The plug must be connected to a properly grounded outlet. (see Figure A)
If the tool should electrically malfunction or breakdown, grounding provides a low
resistance path to carry electricity away from the user, reducing the risk of electric
The grounding prong in the plug is connected through the green wire inside the
cord to the grounding system in the tool. The green wire in the cord must be the only wire
connected to the tool's grounding system and must never be attached to an electrically
Your tool must be plugged into an appropriate outlet, properly installed and
grounded in accordance with all codes and ordinances. The plug and outlet should look like
those in Figure A.
Figure B illustrates a temporary adapter available for connecting grounded plugs
(Figure A) to two prong outlets. The green rigid ear or lug extending from the adapter
must be connected to a permanent ground such as a properly grounded outlet box or
receptacle. Simply remove the center screw from the outlet, insert the adapter and
reattach the screw through the green grounding ear to the outlet if in doubt of proper
grounding, call a qualified electrician. A temporary adapter should only be used until a
properly grounded outlet can be installed by a qualified electrician. The Canadian
Electrical Code prohibits the use of temporary adapters.
WARNING! Improperly connecting the grounding wire can
result in the risk of electric shock. Check with a qualified electrician if you are in
doubt as to whether the outlet is properly grounded. Do not modify the plug provided with
the tool. Never remove the grounding prong from the plug. Do not use the tool if the cord
or plug is damaged. If damaged, have it repaired by a service facility before use. If the
plug will not fit the outlet, have a proper outlet installed by a qualified electrician.