30 CFR § 75.1001-1 Devices for overcurrent protection; testing and calibration requirements; records.
(a) Automatic circuit interrupting devices that will deenergize the
affected circuit upon occurrence of a short circuit at any point in the
system will meet the requirements of §75.1001.
(b) Automatic circuit interrupting devices described in paragraph (a)
of this section shall be tested and calibrated at intervals not to exceed six
months. Testing of such devices shall include passing the necessary amount
of electric current through the device to cause activation. Calibration of
such devices shall include adjustment of all associated relays to ±15 percent
of the indicated value. An authorized representative of the Secretary may
require additional testing or calibration of these devices.
(c) A record of the tests and calibrations required by paragraph (b)
of this section shall be kept, and shall be made available, upon request, to
an authorized representative of the Secretary.
[38 FR 29998, Oct. 31, 1973, as amended at 47 FR 14706, Apr. 6, 1982; 60 FR
33719, June 29, 1995]