Functional Description; Extension Cords - Milwaukee 4270-20 Manual Del Operador

Line Lockout
The line lockout prevents the drill motor from start-
ing when line power is fi rst applied to the system or
after a momentary power loss. To reset tool, turn
magnet switch to "OFF" position and drill on/off
switch to "OFF" position.

FUNCTIONAL DESCRIPTION

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1. Drill motor
2. Slide
3. Wrench storage
(includes 3/32" and 3/16" hex keys)
4. Stop knob
5. Pinion
6. Hub
7. Handle screw
FEATURES
Motor/Magnet Interlock
The motor/magnet interlock is a feature that pre-
vents power from being applied to the drill motor
if the magnet is not energized. The motor magnet
interlock also prevents the magnet from being de-
energized while the motor is running.
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8. Feed handle 16. Support bracket
17. Cutting fl uid reservoir
9. Grip
10. Housing 18. Control panel
11. Cord 19. Magnet indicator light
12. Safety strap 20. Magnet switch
13. Magnetic base 21. Drill on/off switch
14. Spacer 22. Hand pump
15. Drill spindle
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GROUNDING
WARNING
Improperly connecting the
grounding wire can result in the risk of elec-
tric shock. Check with a qualifi ed 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 MILWAUKEE
service facility before use. If the plug will not
fi t the outlet, have a proper outlet installed by
a qualifi ed electrician.
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 break down, grounding provides a
low resistance path to carry electricity away from
the user, reducing the risk of electric shock.
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
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grounding system and must never be attached to
an electrically "live" terminal.
Your tool must be plugged into
an appropriate outlet, properly
installed and grounded in accord-
ance with all codes and ordinances.
The plug and outlet should look like
those in Figure A.
Double Insulated Tools:
Tools with Two Prong Plugs
Tools marked "Double Insulated" do not require
grounding. They have a special double insula-
tion system which satisfi es OSHA requirements
and complies with the applicable standards of
Underwriters Laboratories, Inc.,
the Canadian Standard Asso-
ciation and the National Elec-
trical Code. Double Insulated
tools may be used in either of
the 120 volt outlets shown in
Figures B and C.

EXTENSION CORDS

Grounded 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 extension cord. Using extension cords with
inadequately sized wire causes a serious drop in
voltage, resulting in loss of power and possible tool
damage. Refer to the table shown to determine the
required minimum wire size.
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
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 size.
Guidelines for Using Extension Cords
• If you are using an extension cord outdoors, be
sure it is marked with the suffi x "W-A" ("W" in
Canada) to indicate that it is acceptable for outdoor
use.
• 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
qualifi ed person before using it.
• Protect your extension cords from sharp objects,
excessive heat and damp or wet areas.
Recommended Minimum Wire Gauge
For Extension Cords*
Extension Cord Length
Fig. A
Nameplate
25'
Amperes
0 - 2.0 18
2.1 - 3.4 18
3.5 - 5.0 18
5.1 - 7.0 18
7.1 - 12.0 16
12.1 - 16.0 14
16.1 - 20.0 12
* Based on limiting the line voltage drop to fi ve volts at
150% of the rated amperes.
READ AND SAVE ALL
Fig. B Fig. C INSTRUCTIONS FOR FUTURE USE.
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50' 75' 100' 150'
18 18 18 16
18 18 16 14
18 16 14 12
16 14 12 12
14 12 10 --
12 10 -- --
10 -- -- --