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Subchapter 5. Electrical Safety Orders
Group 2. High-Voltage Electrical Safety Orders
Article 28. Rotating Machinery and Its Control Apparatus (Formerly Article 77)
If specified in this article that one piece of equipment shall be “within sight of” another piece of equipment, the piece of equipment shall be visible and not more than 50.0 ft. (15.24 m) from the other.
(1) Each motor shall be provided with a means for starting and stopping. The switching means shall meet the requirements of Sections 2833 and 2837. A properly coordinated and rated combination of current-limiting fuses and contactor will meet these requirements.
(c) Disconnecting Means.
(1) An individual disconnecting means shall be provided for each controller. A disconnecting means shall be located within sight of the controller location.
EXCEPTIONS to (c)(1):
1. A single disconnecting means may be located adjacent to a group of coordinated controllers mounted adjacent to each other on a multi-motor continuous process machine.
2. The controller disconnecting means for motor branch circuits over 600 volts, nominal, shall be permitted to be out of sight of the controller, if the controller is marked with a warning label giving the location and identification of the disconnecting means which is to be locked in the open position.
(2) Isolation. A means shall be installed to isolate each motor and its controller from all sources of potential. The isolating means shall meet requirements of Section 2835(b).
(3) The disconnecting means shall disconnect the motor and the controller from all ungrounded supply conductors and shall be so designed that no pole can be operated independently.
(4) The disconnecting means shall plainly indicate whether it is in the open (off) or closed (on) position.
(5) The disconnecting means shall be readily accessible. If more than one disconnect is provided for the same equipment, only one need be readily accessible.
(d) General Application-Motors.
(1) Several Motors Served by a Single Disconnecting Means. An individual disconnecting means shall be provided for each motor.
EXCEPTION to (d)(1): A single disconnecting means may be used for a group of motors under any one of the following conditions:
1. A number of motors driving the several parts of a single machine, where the construction or use of the machine is such that it would be impractical to attempt to repair the motor, controller, or machine while any part of the machine is in operation.
2. If a group of motors is under the protection of one set of branch-circuit protective devices; or
3. If a group of motors is in a single room within sight of the location of the disconnecting means.
(2) Motors, motor-control apparatus, and motor branch-circuit conductors shall be protected against overheating due to motor overloads or failure to start, and against short-circuits or ground faults. These provisions do not require overload protection that will stop a motor where a shutdown is likely to introduce additional or increased hazards, as in the case of fire pumps, or where continued operation of a motor is necessary for a safe shutdown of equipment or process and motor overload sensing devices are connected to a supervised alarm.
(3) Control Circuits. High-voltage portions of control circuits shall be protected against fault currents as provided in Section 2883.
1. Renumbering of former section 2882 to new section 2882.1, including amendment of section heading, section and Note, filed 4-1-2009; operative 4-1-2009. Submitted to OAL for printing only pursuant to Labor Code section 142.3 (Register 2009, No. 14).