Article 545

Manufactured Buildings

  1. Scope. This article covers requirements for a manufac‐ tured building and building components as herein defined.
  2. Definitions.

Building Component. Any subsystem, subassembly, or other system designed for use in or integral with or as part of a struc‐ ture, which can include structural, electrical, mechanical, plumbing, and fire protection systems, and other systems affect‐ ing health and safety.

Building System. Plans, specifications, and documentation for a system of manufactured building or for a type or a system of building components, which can include structural, electrical, mechanical, plumbing, and fire protection systems, and other systems affecting health and safety, and including such varia‐ tions thereof as are specifically permitted by regulation, and which variations are submitted as part of the building system or amendment thereto.

Closed Construction. Any building, building component, assembly, or system manufactured in such a manner that all concealed parts of processes of manufacture cannot be inspec‐ ted after installation at the building site without disassembly, damage, or destruction.

Manufactured Building. Any building that is of closed construction and is made or assembled in manufacturing facili‐ ties on or off the building site for installation, or for assembly and installation on the building site, other than manufactured homes, mobile homes, park trailers, or recreational vehicles.

  1. Wiring Methods.
    1. Methods Permitted. All raceway and cable wiring meth‐ ods included in this Code and other wiring systems specifically intended and listed for use in manufactured buildings shall be permitted with listed fittings and with fittings listed and identi‐ fied for manufactured buildings.
    2. Securing Cables. In closed construction, cables shall be permitted to be secured only at cabinets, boxes, or fittings where 10 AWG or smaller conductors are used and protection against physical damage is provided.
  2. Supply Conductors. Provisions shall be made to route the service-entrance conductors, underground service conduc‐ tors, service-lateral, feeder, or branch-circuit supply to the serv‐ ice or building disconnecting means conductors.
  1. Installation of Service-Entrance Conductors. Service- entrance conductors shall be installed after erection at the building site.Exception: Where point of attachment is known prior to manufacture.
  2. Service Equipment. Service equipment shall be instal‐ led in accordance with 230.70.
  3. Protection of Conductors and Equipment. Protection shall be provided for exposed conductors and equipment during processes of manufacturing, packaging, in transit, and erection at the building site.
  4. Boxes.
    1. Other Dimensions. Boxes of dimensions other than those required in Table 314.16(A) shall be permitted to be installed where tested, identified, and listed to applicable standards.
    2. Not Over 1650 cm3 (100 in.3). Any box not over 1650 cm3 (100 in.3) in size, intended for mounting in closed construc‐ tion, shall be affixed with anchors or clamps so as to provide a rigid and secure installation.
  5. Receptacle or Switch with Integral Enclosure. A recep‐ tacle or switch with integral enclosure and mounting means, where tested, identified, and listed to applicable standards, shall be permitted to be installed.
  6. Bonding and Grounding. Prewired panels and build‐ ing components shall provide for the bonding, or bonding and grounding, of all exposed metals likely to become energized, in accordance with Article 250, Parts V, VI, and VII.
  7. Grounding Electrode Conductor. Provisions shall be made to route a grounding electrode conductor from the serv‐ ice, feeder, or branch-circuit supply to the point of attachment to the grounding electrode.
  8. Component Interconnections. Fittings and connectors that are intended to be concealed at the time of on-site assem‐ bly, where tested, identified, and listed to applicable standards, shall be permitted for on-site interconnection of modules or other building components. Such fittings and connectors shall be equal to the wiring method employed in insulation, temper‐ ature rise, and fault-current withstand and shall be capable of enduring the vibration and minor relative motions occurring in the components of manufactured buildings.