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Page 9
DOUBLE INSULATION
Double insulation is a safety concept for electric power tools, which eliminates
the need for the usual three-wire grounded power cord. All exposed metal parts
are isolated from the internal metal motor components with protecting insulation.
Double insulated tools do not need to be grounded.
WARNING
The double insulated system is intended to protect the user from shock resulting from
a break in the tool’s internal wiring. Observe all normal safety precautions to avoid electrical shock.
IMPORTANT: Servicing a tool with double insulation requires extreme care and knowledge
of the system and should be performed only by a qualied service technician. Always use the
original factory replacement parts when servicing.
ELECTRICAL CONNECTION
The Angle Grinder has a precision-built electric motor. It should be connected to a power supply that
is 120V, 60Hz AC only (normal household current). Do not operate this tool on direct current (DC). A
substantial voltage drop will cause a loss of power and the motor to overheat. If your tool does not
operate when plugged into an outlet, double-check the power supply.
USE PROPER EXTENSION CORD. Make sure your extension cord is in good condition. When us-
ing an extension cord, be sure to use one heavy enough to carry the current your product will draw.
An undersized cord will cause a drop in line voltage resulting in loss of power and overheating. Table
1 shows the correct size to use depending on cord length and nameplate ampere rating. If in doubt,
use the next heavier gage. The smaller the gage number, the heavier the cord.
Table 1 Minimum gauge for cord
Rating Volts Total length of cord in feet
Ampere 120V 25ft. 50ft. 100 ft. 150 ft.
More Than Not More Than AWG
0
6
10
6
10
12
18
18
16
16
16
16
16
14
14
14
12
12
12 16 14 12 Not Recommended
CAUTION
Keep the extension cord clear of the working area. Position the cord so that it will not get
caught on lumber, tools or other obstructions while you are working with a power tool.
WARNING
Check extension cords before each use. If damaged replace immediately. Never use a tool
with a damaged cord since touching the damaged area could cause electrical shock resulting in serious
injury.
ELECTRICAL
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