FAQ

Material taken from the National Electric Code

is reprinted with permission

from NFPA 70

, 2023 edition. National Electrical Code

NEC

Text

continued from page 57

245.2 Reconditioned Equipment.

245.21 Circuit-Interrupting Devices.

245.26 Feeders and Branch Circuits.

245.27 Additional Requirements for Feeders.

Article 305 General Requirements for Wiring Methods

and Materials for Systems Rated Over 1000 Volts ac,

1500 Volts dc, Nominal

305.1 Scope.

305.3 Other Articles.

305.4 Conductors of Different Systems.

305.5 Conductor Bending Radius.

305.6 Protection Against Induction Heating.

305.7 Covers Required.

305.8 Raceways in Wet Locations Above Grade.

305.9 Braid-Covered Insulated Conductors - Exposed

Installation.

305.10 Insulation Shielding.

305.11 Moisture or Mechanical Protection for Metal-

Sheathed Cables.

305.12 Danger Signs.

305.15 Underground Installations.

Expert Analysis

New articles have been added to address the

requirements for overcurrent protection for systems

rated over 1000 volts ac, 1500 volts dc.

Many consider these voltage levels as medium voltage

(MV) and these articles provide guidance to the electrical

industry, including inspectors, with more guidance in

terms of medium voltage installations.