Motor Safety Protection; Wire Sizes - RIDGID MS1250 Owner's Manual

Motor Specifications and Electrical Requirements (con't.)

Motor Safety Protection

1. Connect this tool to a 120v, 15-amp branch circuit with
a 15-amp time delay fuse or circuit breaker. Using the
wrong size fuse can damage the motor.
2. If the motor won't start, release the trigger switch
immediately. Unplug The Tool. Check the saw blade
to make sure it turns freely. If the blade is free, try to
start the motor again. If the motor still does not start,
refer to the "Motor Trouble-Shooting Chart."
3. If the motor suddenly stalls while cutting wood, release
the trigger switch, unplug the tool, and free the blade
from the wood. The motor may now be restarted and
the cut finished.
4. Fuses may "blow" or circuit breakers may trip fre-
quently if:

Wire Sizes

NOTE: Make sure the proper extension cord is used and
is in good condition. The use of any extension cord will
cause some loss of power. To keep this to a minimum
and to prevent overheating and motor burn-out, use the
table below to determine the minimum wire size A.W.G.)
extension cord.
For circuits that are farther than 100 feet away from elec-
trical service box, the wire size must be increased pro-
portionately in order to deliver ample voltage to the saw
motor.
a. Motor Is Overloaded-Overloading can occur if you
feed too rapidly or make too many start/stops in a
short time.
b. Line voltages are more than 10% above or below the
nameplate voltage. For heavy loads, however, the
voltage at motor terminals must equal the voltage
specified on nameplate.
c. Improper or dull saw blades are used.
5. Most motor troubles may be traced to loose or incor-
rect connections, overload, low voltage (such as small
size wire in the supply circuit) or to overly long supply
circuit wire. Always check the connections, the load
and the supply circuit whenever motor doesn't work
well. Check wire sizes and length with the Wire Size
Chart below.
Extension Cord
Length
110-120V
0-25 Ft.
26-50 Ft.
8
Wire Sizes Required for
120V (A.W.G.)
14
12