Article 650 Pipe Organs
Informational Note: The typical pipe organ is a very large musical instrument that is built as part of a building or structure.
Informational Note: Most new electronic organs produce sound digitally and are called digital organs.
Pipe Organ. A musical instrument that produces sound by driving pressurized air (called wind) through pipes selected via a keyboard.
Pipe Organ Sounding Apparatus. The sound-producing part of a pipe organ, including, but not limited to, pipes, chimes, bells, the pressurized air (wind)-producing equipment (blower), associated controls, and power equipment.
Informational Note: One method of determining that cable is resistant to flame spread is by testing the cable to the VW-1 (vertical-wire) flame test in ANSI/UL 1581-2017, Reference Standard for Electrical Wires, Cables and Flexible Cords.
Informational Note: Access to the pipe organ sounding apparatus and the associated circuitry is restricted by an enclosure. In most pipe organ installations, exterior pipes form part of the enclosure. In other installations, the pipes are covered by mill-work that permits the passage of sound.