// CODE SNIPPET
430.89 Speed Limitation
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Machines of the following types shall be provided with speed-limiting devices or other speed-limiting means:
- Separately excited dc motors
- Series motors
- Motor-generators and converters that can be driven at excessive speed from the dc end, as by a reversal of current or decrease in load
Exception: Separate speed-limiting devices or means shall not be required under either of the following conditions:
- Where the inherent characteristics of the machines, the system, or the load and the mechanical connection thereto are such as to safely limit the speed
- Where the machine is always under the manual control of a qualified operator
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