ARTICLE 660. X-RAY EQUIPMENT


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ARTICLE 660. X-RAY EQUIPMENT
ARTICLE 660. X-RAY EQUIPMENT660.1. Scope.‚ÄÉThis covers industrial or other nonmedical applications exclusively; health care provisions are covered in Art. 517, Part V. An x-ray tube of the hot-cathode type, as now commonly used, is a two-element vacuum tube in which a tungsten filament serves as the cathode. Current is supplied to the filament at low voltage. In most cases, unidirectional pulsating voltage is applied between the cathode and the anode. The applied voltage is measured or described in terms of the peak voltage, which may be anywhere within the range of 10,000 to 1 million V, or even more. The current flowing in the high-voltage circuit may be as low as 5 mA or may be as much as 1 A, depending on the desired intensity of radiation. The high …
Citation
Frederic P. Hartwell; Joseph F. McPartland; Brian J. McPartland: McGraw-Hill's National Electrical Code 2017 Handbook, 29th Edition. ARTICLE 660. X-RAY EQUIPMENT, Chapter (McGraw-Hill Professional, 2017), AccessEngineering Export