Article 398 Open Wiring on Insulators

I. General

398.1	Scope
398.2	Definition

This type of wiring is exposed with a single insulated conductor using an insulator (knob, cleat, tube, or flexible tubing) for protection and support.

II. Installation

398.10

Uses Permitted

This type of wiring can be used only where the nominal voltage does not exceed 600 V, in industrial or agricultural structures, both indoors and outdoors, both wet and dry locations, for services, and where corrosive vapors are present.

398.12

Uses Not Permitted

Cannot be used if concealed by the building structure.

398.15	Exposed Work
398.17	Through or Parallel to Framing Member
398.19	Clearances
398.23	In Accessible Attics
398.30	Securing and Supporting
398.42	Devices

 

III. Construction Specifications

398.104

Conductors