The provisions of Article 590 of NFPA 70 are adopted by reference with the following modifications:
1. Insert new Part II to read:
"Temporary Booths or Exhibits Inside of Buildings
590.10 Connections to Building Systems. No exhibitor shall make any electrical installation to, or alteration of the permanent wiring inside of a building.
590.11 Qualified Person. All electrical connections to the building electrical system or extensions thereto shall be made under the supervision and direction of a qualified person.
590.12 Extensions from the Building System. Extensions from the building electrical system shall be made by one of the approved wiring methods in Chapter 3, or shall be made by flexible multi-conductor cord, with grounding conductor, rated for extra-hard usage. All extensions shall comply with 590.6.
590.13 Terminations. Terminations of extensions to the building electrical system shall be enclosed in assemblies specifically approved for the purpose by the authority having jurisdiction.
590.14 Cords Above Floor Level. Cords rated a minimum of hard usage shall be permitted to be used above floor level.
590.15 Arrangement of Cords. All cords shall be arranged in lengths and patterns, in a workmanlike manner, to avoid excess cord hazards.
590.16 Grounding. All flexible multiconductor cords shall have a grounding conductor and be rated for extra- hard usage or hard usage as permitted in 590.12 and 590.14, unless the cord is a component of an approved assembly.
590.17 Traffic Area. No cord shall be run across any space where subject to traffic unless the cord is enclosed in a substantial enclosure specifically approved for the purpose.
590.18 Cord Overcurrent Protection. All cords shall be protected by a properly sized overcurrent device.
590.19 Approval. For the purposes of this Article, all electrical equipment or appliances connected to the building electrical system or extensions thereto in booths or displays shall be:
(1) Listed and labeled in accordance with 110.3; or
(2) Specifically approved by the authority having jurisdiction and subject to field inspection.
Informational Note: An unlisted foreign luminaire is an example of material which would require specific approval under (2) of this section.
590.20 Permanent Wiring. Wiring permanently installed on all booths or displays including prewired booths brought in for connection to the building electrical system shall be enclosed in a raceway as allowed by a wiring method recognized in Chapter 3. Where flexibility is necessary, such as between booth sections and at connection points to the building electrical system or supply points, properly rated cord in lengths not to exceed 1.83 m (6 ft) and equipped with approved attachment plugs shall be permitted to be utilized.
590.21 Splices. All splices and terminations shall be made in approved metal enclosures.
590.22 Supports. No electrical equipment shall be attached to or supported by either dividers or curtains.
590.23 Fastened in Place. All electrical equipment shall be securely fastened in place using a recognized method.
Informational Note: Velcro, glue, tape, or similar methods are not suitable as a means of attachment.
590.24 Live Parts. There shall be no exposed energized current-carrying metal parts.
590.25 Exposed Metal Parts. All exposed noncurrent-carrying parts of the installations shall be effectively grounded in accordance with Article 250 of this Code.
590.26 Combustible Material. No electrical equipment or appliance which, under normal operating conditions, attains a surface temperature in excess of 90°C (194°F) shall be mounted on or supported from any combustible material, unless separated therefrom by a substantial noncombustible material.
590.27 Lighting Fixtures. Lighting fixtures or other appliances or equipment having other than a cord as outlined in 590.12 through 590.15 shall be permitted to be accepted provided the complete assembly, including the cord, is listed and labeled in accordance with 110.3.
590.28 Custom Displays. Unlabeled custom-made light fixtures and displays shall be permitted when fabricated using all listed and labeled components. Fabrication shall be by an electrical contractor. All equipment of this type shall be specifically approved by the authority having jurisdiction and shall be subject to field inspection.
590.29 Overcurrent Protection. All show wiring and related electrical equipment shall be provided with proper overcurrent protection as required in this Code.
590.30 Class 2 Wiring. All open class 2 wiring shall conform to Articles 725 of this Code and shall be fed from an approved Class 2 power source. For the purposes of this section only, a required non-interchangeable overcurrent device allowed to establish a Class 2 circuit shall be as follows:
0 - 15 volts – 5 amperes
15 - 30 volts – 3 amperes
30 - 60 volts – 1-1/3 amperes.
590.31 Low-Voltage Wiring. All wiring and equipment not conforming to 590.30 shall be wired in accordance with 590.20 through 590.29 and Article 411 of this Code."
2. Insert new Part III to read:
"Signs
590.40 Disconnect. All signs shall have a readily accessible disconnect.
590.41 Transformers and Cords. Transformers and cords shall be approved in accordance with 110.3.
590.42 Enclosures. All splices between supply conductors and transformer primary leads shall be enclosed in a listed enclosure. If the display is custom made, the enclosure shall be a minimum No. 12 gauge sheet metal or the equivalent and shall be free from sharp edges. All custom made enclosures are subject to field inspection.
590.43 Splices. Splices between secondary transformer leads and neon tube conductor shall be adequately insulated and enclosed in a listed metal enclosure.
590.44 Protective Enclosure. Neon sign displays which are erected at a height of 2.4 m (8 ft) or below shall be provide with a protective plexiglass shield. The protective shield shall be mounted and arranged to provide adequate ventilation.
Exception: The required shield shall be permitted to be omitted when in the opinion of the authority having jurisdiction, equivalent means of protection are provided.
590.45 Grounding. Grounding and bonding shall comply with the requirements of Article 250."