2020 NEC Significant Code Changes Part 1

200 – Use and Identification of Grounded Conductors

210 – Branch Circuits

215 – Feeders

220 – Branch-Circuit, Feeder, and Service Load Calculations

225 – Outside Branch Circuits and Feeders

230 – Services

240 – Overcurrent Protection

242 – Overvoltage Protection

250 – Grounding and Bonding

300 – General Requirements for Wiring Methods and Materials

310 – Conductors for General Wiring

311 – Medium Voltage Conductors and Cable

312 – Cabinets, Cutout Boxes, and Meter Socket Enclosure

314 – Outlet, Device, Pull and Junction Boxes; Conduit Bodies; Fitting; and Handhole Enclosures

320 – Armored Cable: Type AC

330 – Metal-Clad Cable: Type MC