Article 530 Motion Picture and Television Studios and Similar Locations
Informational Note: For methods of protecting against cellulose nitrate film hazards, see NFPA 40-2019, Standard for the Storage and Handling of Cellulose Nitrate Film.
Alternating-Current Power Distribution Box (Alternating-Current Plugging Box, Scatter Box). An ac distribution center or box that contains one or more grounding-type polarized receptacles that may contain overcurrent protective devices.
Motion Picture Studio (Lot). A building or group of buildings and other structures designed, constructed, or permanently altered for use by the entertainment industry for the purpose of motion picture or television production.
Spider (Cable Splicing Block). A device that contains busbars that are insulated from each other for the purpose of splicing or distributing power to portable cables and cords that are terminated with single-pole busbar connectors.
Stage Effect (Special Effect). An electrical or electromechanical piece of equipment used to simulate a distinctive visual or audible effect such as wind machines, lightning simulators, sunset projectors, and the like.
Stage Property. An article or object used as a visual element in a motion picture or television production, except painted backgrounds (scenery) and costumes.
Stage Set. A specific area set up with temporary scenery and properties designed and arranged for a particular scene in a motion picture or television production.
Television Studio or Motion Picture Stage (Sound Stage). A building or portion of a building usually insulated from the outside noise and natural light for use by the entertainment industry for the purpose of motion picture, television, or commercial production.
Exception: Communications circuits; audio signal processing, amplification, and reproduction circuits; Class 1, Class 2, and Class 3 remote-control or signaling circuits and power-limited fire alarm circuits shall be permitted to be wired in accordance with Articles 640, 725, 760, and 805.
Exception: Portable luminaires used as properties in a motion picture set or television stage set, on a studio stage or lot, or on location shall not be considered to be portable luminaires for the purpose of this section.
- The opening is of noncombnstible material.
- When in use, the penetration is sealed with a temporary seal of a listed firestop material.
- When not in use, the opening shall be capped with a material of equivalent fire rating.
|Portion of Stage Set Lighting Load to Which Demand Factor Applied (volt-amperes)||Feeder Demand Factor (percent)|
|First 50,000 or less at||100|
|From 50,001 to 100,000 at||75|
|From 100,001 to 200,000 at||60|
|Remaining over 200,000 at||50|
- Connection and disconnection of connectors are only possible where the supply connectors are interlocked to the source and it is not possible to connect or disconnect connectors when the supply is energized.
- Line connectors are of the listed sequential-interlocking type so that load connectors shall be connected in the following sequence:
- A caution notice shall be provided adjacent to the line connectors, indicating that plug connection shall be in the following order:
The warning sign(s) or label(s) shall comply with 110.21(B).