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Electrical requirements and safety, Warning, Grounding instructions – Craftsman 137.21241 User Manual

Page 7: Guidelines for extension cords

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ELECTRICAL REQUIREMENTS AND SAFETY

GROUNDING INSTRUCTIONS

IN THE EVENT OF A MALFUNCTION OR

BREAKDOWN, grounding provides a path of

least resistance for electric currents and reduces

the risk of electric shock. This tool is equipped

with an electrical cord that has an equipment-

grounding conductor and a grounding plug. The

plug must be plugged into a matching receptacle

that is properly installed and grounded in

accordance with all local codes and ordinances.
DO NOT MODIFY THE PLUG PROVIDED.

If it will not fit the receptacle, have the proper

receptacle installed by a qualified electrician.
IMPROPER CONNECTION of the equipment

grounding conductor can result in risk of electric

shock. The conductor with the green insulation

(with or without yellow stripes) is the equipment

grounding conductor. If repair or replacement of

the electrical cord or plug is necessary, do not

connect the equipment grounding conductor to a

live terminal.
CHECK with a qualified electrician or service

person if you do not completely understand the

grounding instructions, or if you are not certain

the tool is properly grounded.
USE only three-wire extension cords that have

three-pronged grounding plugs with three-pole

receptacles that accept the tool’s plug. Repair or

replace damaged or worn cords immediately.

GUIDELINES FOR EXTENSION

CORDS

USE THE PROPER EXTENSION CORD. Make

sure your extension cord is in good condition.

Use an extension cord 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, overheating and burning out

of the motor. The table on the right shows the

correct size to use depending on cord length

and nameplate ampere rating. If in doubt, use

the next heavier gauge. The smaller the gauge

number, the heavier the cord.

Make sure your extension cord is properly

wired and in good condition. Always replace a

damaged extension cord or have it repaired by a

qualified technician before using it. Protect your

extension cords from sharp objects, excessive

heat and damp or wet areas.

Use a separate electrical circuit for your tool. This

circuit must not be less than #12 wire with a 20 A

time-lag fuse or a #14 wire with a 15 A time-lag

fuse.

NOTE: When using an extension cord on a

circuit with a #14 wire, the extension cord must

not exceed 25 feet in length. Before connecting

the motor to the power line, make sure the switch

is in the off position and the electric current is

rated the same as the current stamped on the

motor nameplate. Running at a lower voltage

will damage the motor. This tool is intended for

use on a circuit that has a receptacle like the one

illustrated in Fig. 1.

Fig. 1 shows a three-pronged electrical plug and

receptacle that has a grounding conductor. If a

properly grounded receptacle is not available,

an adapter (Fig. 2) can be used to temporarily

connect this plug to a two-contact grounded

receptacle. The adapter (Fig. 2) has a rigid lug

extending from it that MUST be connected to

a permanent earth ground, such as a properly

grounded receptacle box.

In all cases, make certain the receptacle is

properly grounded. If you are not sure, have a

qualified electrician check the receptacle.

This tool is for indoor use only. Do not

expose to rain or use in damp locations.

Fig. 1

Fig. 2

Three-Pronged Plug

Grounding Prong

Properly Grounded

Three-Pronged

Receptacle

Grounding Lug

Make sure this

is connected

to a known

ground.

Two-Pronged

Receptacle

Adapter

This tool must be grounded while in use to

protect the operator from electric shock.

MINIMUM GAUGE FOR EXTENSION CORDS (AWG)

(When using 120 volts only)

Ampere Rating

Total length of Cord

More Than Not More Than 25ft. 50ft. 100ft. 150ft.
0 6

18 16 16 14

6 10

18 16 14 12

10 12

16 16 14 12

12 16

14 12

Not Recommended

WARNING

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WARNING

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WARNING

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