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Subchapter 5. Electrical Safety Orders
Group 2. High-Voltage Electrical Safety Orders
ARTICLE 20. INTERRUPTING AND ISOLATING DEVICES
Circuit breakers shall comply with all the provisions of American National Standard ANSI/IEEE C37.04 -1979, Rating Structure for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis, which is hereby incorporated by reference, and shall be permitted to be single pole or multi-pole. They shall:
(a) Have an accessible mechanical or other approved means for manual tripping, independent of control power.
(b) Be release free (trip free).
(c) Have positive means to prevent unintended operation during inspection or maintenance.
(d) When operated manually while energized, open and close the main contacts independent of the speed of the manual operation.
(e) Be equipped with a mechanical position indicator to show the open or closed position of the main contacts.
(Title 24, Part 3, Section 710-21 (a) (4) a-e.)
<General Materials (GM) - References, Annotations, or Tables>
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code; and Section 18943(c), Health and Safety Code.
1. Amendment filed 2-1-83; effective thirtieth day thereafter (Register 83,
2. Editorial correction filed 11-2-83 (Register 83, No. 45).
3. Amendment filed 12-10-87; operative 1-9-88 (Register 88, No. 1).
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