Pursuant to Section 5 of the NFPA Regulations Governing the Development of NFPA Standards, the National Fire Protection Association has issued the following Tentative Interim Amendment to NFPA 70®, National Electrical Code®, 2023 edition. The TIA was processed by Code-Making Panel 6 and the Correlating Committee on National Electrical Code, and was issued by the Standards Council on August 25, 2023, with an effective date of September 14, 2023.
1. Revise section 400.47 to read as follows:
400.47. Minimum Conductor Bending Radii Radius. The minimum bending radii for Pportable power feeder cables rated from 2000 volts to 5000 volts shall not exceed be bent to a radius less than six times the overall cable outer diameter. The minimum bending radii for Pportable power feeder cables rated from 5001 volts to 25,000 volts shall not exceed be bent to a radius less than eight times the overall cable outer diameter.
Note: A TIA is tentative because it has not been processed through the entire standards development process. It is interim because it is effective only between editions of the standard. A TIA automatically becomes a public input of the proponent for the next edition of the standard; as such, it then is subject to all of the procedures of the standards-making process.
