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1. Scope Section A - Transformers for Luminous-Tube Signs A1.1 This section applies to transformers for luminous-tube signs of portable and stationary types, for potentials up to and includ ing 600 volts low-potential, and l5,000 volts open-circuit

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1.1 This specification covers the construction of standard and custom-built interior steel doors and frames for ships including U.S. Coast Guard certificated vessels. 1.2 Doors and frames are to be hollow metal construction with the door insulated for sound or fire. 1.3 The doors are intended for use in staterooms, lavatories, passageways, and other protected areas. 1.4 Values stated in inch-pound units are to be regarded as the standard. 1.5 The metric equivalents, given in parentheses, are provided for information only.

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