RIDGID SP6490 manual Motor Safety Protection, Wire Sizes, Extension Cord Gauge Length 25-50

Motor Safety Protection

IMPORTANT: To avoid motor damage, this motor should be blown out or vacu- umed frequently to keep sawdust from interfering with normal motor ventilation.

1.Connect this tool to a power source with the appropriate voltage for your model and a 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, turn the switch off immediately and unplug the tool. Check the quill to make sure it turns freely. If the quill is free, try to start the motor again. If the motor still does not start, refer to the "Motor Troubleshooting Chart."

3.Fuses may "blow" or circuit breakers may trip frequently if:

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 should not be more than 10% above or below the nameplate voltage. For heavy loads, however, the voltage at motor terminals must equal the voltage specified for your model.

c. Improper or dull drill bit is used.

4.Most motor troubles may be traced to loose or incorrect connections, overload, low voltage (such as small size wire in the supply circuit) or to overly long sup- ply circuit wire. Always check the con- nections, the load and the supply circuit whenever motor doesn't work well. Check wire sizes and length with the Wire Size Chart shown.

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 min- imum and to prevent overheating and motor burnout, use the table at right to determine the minimum wire size (A.W.G.) extension cord.

Use only 3-wire extension cords which have 3-prong grounding type plugs and 3-

pole receptacles which accept the tools plug.

Extension Cord	Gauge
Length	(A.W.G.)
0-25	16
25-50	14

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