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No overload protection will be required for drilling rigs using railroad locomotive power systems for the draw works, rotary table and mud pumps.
NOTE: In this electrical system, generators, generator power leads, and DC motors are automatically protected against overload by inherent characteristics of compound and differential field windings in the DC motor and generator, respectively.
NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code; and Section 18943(c), Health and Safety Code.
1. Editorial correction of NOTE filed 11-2-83 (Register 83, No. 45).
2. Amendment filed 8-27-86; effective thirtieth day thereafter (Register 86, No. 37).