Electrical – RIDGID R2611 User Manual
Page 7

7
DOUBLE INSULATION
Double insulation is a concept in safety in 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 protect-
ing 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.
NOTE: Servicing of a tool with double insulation requires 
extreme care and knowledge of the system and should be 
performed only by a qualified service technician. For service, 
we suggest you return the tool to your nearest authorized 
service center for repair. Always use original factory replace-
ment parts when servicing.
ELECTRICAL CONNECTION
This tool has a precision-built electric motor. It should be 
connected to a 
power supply that is 120 volts, 60 Hz, 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 will overheat. If your tool does 
not operate when plugged into an outlet, double-check the 
power supply.
EXTENSION CORDS
When using a power tool at a considerable distance from 
a power source, be sure to use an extension cord that has 
the capacity to handle the current the tool will draw. An 
undersized cord will cause a drop in line voltage, resulting in 
overheating and loss of power. Use the chart to determine 
the minimum wire size required in an extension cord. Only 
round jacketed cords listed by Underwriter’s Laboratories 
(UL) should be used.
When working outdoors with a tool, use an extension 
cord that is designed for outside use. This type of cord is 
designated with “WA” on the cord’s jacket.
Before using any extension cord, inspect it for loose or 
exposed wires and cut or worn insulation.
**Ampere rating (on tool data plate)
0-2.0
2.1-3.4
3.5-5.0 5.1-7.0 7.1-12.0 12.1-16.0
Cord Length
Wire Size (A.W.G.)
25'
16
16
16
16
14
14
50'
16
16
16
14
14
12
100'
16
16
14
12
10
—
**Used on 12 gauge - 20 amp circuit.
NOTE: AWG = American Wire Gauge
WARNING:
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. Failure to do so can 
result in serious personal injury.
WARNING:
Check extension cords before each use. If 
damaged replace immediately. Never use tool with 
a damaged cord since touching the damaged area 
could cause electrical shock resulting in serious 
injury.
ELECTRICAL
