The 2011 North Carolina Electrical Code became effective July 3, 2012.
110.24 Available Fault Current
A new section requires some equipment to be marked with the available fault current and requires updating of that marking if modifications of the electrical system occur.
210.8 GFCI Protection
There were several changes made to this section of the Code, addressing accessibility and location issues. A new requirement addresses the accessibility of the test and reset functions of GFCI devices.
210.12 Arc-Fault Circuit-Interrupter Protection for Dwelling Units
Changes have been made to this section to address fire alarm circuiting, Type MC Cables, concrete-encased raceways, and branch circuit extensions or modifications.
210.52 Dwelling Unit Receptacle Outlet Requirements
A change to the wall spacing requirements has been made to address fixed cabinets, and the wall spacing requirements have been clarified.
A 15A or 20A, 125V receptacle is now required in dwelling unit accessory buildings that have electric power.
250.30 Grounding Separately, Derived Systems
This section has been reorganized and includes many revisions and notes to clarify the grounding and bonding requirements of separately derived systems.
250.52(A) Electrodes Permitted for Grounding
The rule explaining when a structural metal frame can serve as a grounding electrode has been changed again, and the requirements for concrete encased electrodes, ground rods, and ground plates have been clarified.
250.53(A) Rod, Pipe, and Plate Electrodes
The 25-ohm rule has been relocated and greatly clarified. Editorial changes to this section have also been made, and the Informational Note has been revised.
250.121 Use of Equipment Grounding Conductors
A new section was added to prohibit the use of the equipment grounding conductor as a grounding electrode conductor.
300.4 Protection Against Physical Damage
This rule has been revised to be more technically accurate.
300.5 Underground Installations
Type MI and Type MC Cables are now allowed to be installed under buildings without a raceway. This change clarifies the use of single conductor cables installed in parallel.
300.11(A)(2) Non Fire-Rated Ceiling Assemblies
The rule requiring identification of electrical ceiling support wires has been expanded.
300.22 Wiring in Ducts and Other Spaces for Environmental Air (Plenums)
Extensive revisions have been made to the language of this section, and a new subsection was added addressing cable trays.
310.15 Conductor Ampacity
This section, dealing with the ampacity of conductors, has been extensively revised.
404.2(C) Switches Controlling Lighting
A new rule will require a neutral conductor at nearly every switch point.