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90.2 Scope of the NEC |
This subsection was revised to group similar types of installations together and to make it easier to read. The first sentence was revised to read: . . . |
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90.2 Scope of the NEC |
The rule that exempts electric utilities from complying with the requirements of the NEC was revised to read: (B) Not Covered. (5) E . . . |
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90.4 Enforcement (Inspection) |
The first paragraph of this section was revised to read: This Code is intended to be suitable for enforcement by governmental bodies that ex . . . |
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Grounding Electrode Conductor |
The definition for “Grounding Electrode Conductors” was revised to read:Grounding Electrode Conductor. The conductor that . . . |
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Ground-Fault Circuit Interrupter |
The definition for “Ground-Fault Circuit Interrupter” was revised to read: Ground-Fault Circuit Interrupter. A device int . . . |
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Luminaire |
A new definition was added to replace the NEC terms “fixtures” and “lighting fixtures.” This definition reads: Lumi . . . |
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Qualified Person |
The definition of “Qualified Person” was revised to read: Qualified Person. A person who has the skill and knowledge re . . . |
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110.12 Mechanical Execution of Work |
This rule was revised to read: (A) Unused Opening. Unused cable or raceway openings in boxes, auxiliary gutters, cabinets, cuto . . . |
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110.14 Electrical Connections |
New text was added to clarify conductor sizing for terminals and it reads: (C)Temperature Limitations (1) Equipment Provisions. Th . . . |
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110.15 High-Leg Marking |
New rule added to cover the identification of the high-leg. This rule reads: On a 4-wire, delta-connected system where the midpoint of one p . . . |
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110.16 Flash Protection |
A new Code section and two FPN’s were added to provide requirements for marking equipment where arc fault hazards may be present. The new secti . . . |
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110.22 Identification of Disconnecting Means |
The text was revised to read: All installed disconnecting means must be legibly marked to indicate their purpose unless they are l . . . |
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110.26 Spaces About Electrical Equipment |
A new sentence was added, which addresses exit door requirements (panic hardware) for rooms containing large electrical equipment. This section now r . . . |
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110.26 Spaces About Electrical Equipment |
The intent of the requirements for "dedicated equipment space" located indoors was completely revised and the rule reads: (F) Dedicated Equ . . . |
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200.6 Means of Identifying Grounded (neutral) Conductor |
The term "natural" was deleted and a FPN was added to this section. It reads: (A) Identifying Grounded (neutral) Conductors 6 AWG or Small . . . |
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200.7 Use of Insulation of a White or Gray Color |
The term "natural" was deleted and a FPN added to this section to read: (C) Circuits Over 50V. The use of white or natural gray in . . . |
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210.63 Heating, Air-Conditioning, and Refrigeration Equipment Outlet |
The words “on rooftops and in attics and crawl spaces” and the exception were deleted so that this rule would coordinate with the mechanic . . . |
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210.7 Branch Circuit Receptacle Requirements |
New text clarifies the requirement for simultaneously disconnecting the ungrounded branch circuit conductors. (C) Multiple Branch Circuits. . . . |
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210.8 Ground-Fault Circuit-Interrupter Protection for Personnel |
New subsection was added to include boathouses.(A) Dwelling Units. GFCI protection must be provided for all 15 and 20A, single-phase . . . |
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210.8 Ground-Fault Circuit-Interrupter Protection for Personnel |
New subsection was added to include kitchens. (B) Other than Dwelling Units. All 15 and 20A, single-phase, 125V receptacles instal . . . |
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210.12 Arc-Fault Circuit-Interrupter (AFCI) Protection |
The word "receptacle" was deleted and the words “listed device that protects the entire branch circuit” were added. This subsection . . . |
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210.52 Dwelling Unit Receptacle Outlets |
The maximum distance the required receptacle for the counter surface can be above a dwelling unit kitchen counter surface was changed from 18 in. to 2 . . . |
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210.52 Dwelling Unit Receptacle Outlets |
This section was revised to read: (D) Bathrooms. In dwelling units, at least one 15 or 20A, single-phase, 125V receptacle outlet . . . |
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210.52 Dwelling Unit Receptacle Outlets |
This section was revised to read: (G) Basements and Garages. For a one-family dwelling, at least one 15 or 20A, single-phase 125V . . . |
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225.32 Disconnecting Means Location |
Exception No. 1 was revised to read: The disconnecting means for a building or structure must be installed either inside or outside of the . . . |
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230.10 Vegetation as Support |
A new rule was added, which reads:Vegetation such as trees cannot be used for the support of overhead service conductors. Figure 230-1< . . . |
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230.50 Protection of Cables Against Damage – Above Ground |
Item (3) was revised from “rigid nonmetallic conduit” to Schedule 80 rigid nonmetallic conduit, so that this section reads: |
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230.70 Service Disconnect - General |
New text was added and it reads: (A) Location of Service Disconnecting Means (3) Remote Control. Where a remote con . . . |
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240.2 Definitions |
The following definitions were added for Article 240: Current-Limiting Over current Protective Device. A current-limiting over current . . . |
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240.21 Location in Circuit |
A new subsection was added to read: (C) Transformer Secondary Conductors (6) Secondary Conductors Not Over 25 ft. Secondary conductor . . . |
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240.33 Vertical Position |
This section was revised to read: Enclosures for over current devices must be mounted in a vertical position unless it is impracticable. Cir . . . |
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240.83 Marking |
This subsection was revised and it reads: (D) Used as Switches. Circuit breakers used to switch 120V or 277V fluorescent lighting . . . |
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240.85 Applications |
The second paragraph was revised and a FPN was added to read: A circuit breaker with a straight voltage rating (240V or 480V) can be used o . . . |
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240.85 Applications |
Author’s Comment: A 120/240V slash circuit breaker cannot be used on the high-leg of a solidly-grounded 120/240V delta system, because . . . |
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250.2 Definitions |
The following definitions were added to Article 250: Effective Ground-Fault Current Path. An intentionally constructed, permanent, . . . |
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250.4 General Requirements for Grounding and Bonding |
Section 250-2 in the 1999 NEC was revised and relocated to 250.4. It now reads: (A) Grounded Systems. (2) Grounding of Electrical Equip . . . |
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250.4 General Requirements for Grounding and Bonding |
Section 250-2 in the 1999 NEC was revised and relocated to 250.4. It now reads: (A) Grounded Systems. (3) Bonding of Electrical Equipment . . . |
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250.4 General Requirements for Grounding and Bonding |
Section 250-2 in the 1999 NEC was revised and relocated to 250.4. It now reads: (A) Grounded Systems. (4) Bonding of Electrically Conductive . . . |
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250.4 General Requirements for Grounding and Bonding |
(A) Grounded Systems. (5) Effective Ground-Fault Current Path. Electrical equipment and other electrically conductive mate . . . |
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250.30 Grounding Separately Derived Alternating-Current Systems |
This Subsection was reworded and additional requirements added to contain the requirements for grounding multiple separately derived systems. This summary . . . |
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250.32 Buildings or Structures Supplied with Feeder |
This subsection added a new requirement and it reads: (B) Grounded Systems (2) Grounded (neutral) Conductor. Where (1) an equipment . . . |
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250.32 Two or More Buildings or Structures Supplied with Feeder |
The rule now reads: (E) Grounding Electrode Conductor. The size of the grounding electrode conductor for a building . . . |
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250.50 Grounding Electrode System |
This section was completely revised to read: If available on the premises at each building or structure, all of the electrodes identified i . . . |
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250.54 Supplementary Grounding Electrodes |
This section was revised to read: Supplementary grounding electrodes can be installed and they can be connected to the equipment grounding . . . |
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250.102 Equipment Bonding Jumpers |
A new exception was added to this subsection and this subsection now reads: (E) Installation. The equipment bonding jumper can be installed . . . |
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250.104 Bonding of Piping Systems and Exposed Structural Steel |
The word “interior” was deleted in this section. This section now reads: (A) Metal Water Piping (1) General Requirements. |
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250.104 Bonding of Piping Systems and Exposed Structural Steel |
An exception was added to this section. This section now reads: (A) Metal Water Piping (4) Separately Derived Systems. To prevent . . . |
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250.104 Bonding of Piping Systems and Exposed Structural Steel |
The word “interior” was deleted in this section. This section now reads: (B) Other Metal Piping Systems. Interior Me . . . |
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250.104 Bonding of Piping Systems and Exposed Structural Steel |
The word “interior” was deleted and the sizing of the bonding jumper was changed from 250.122 to 250.66. This section now reads: . . . |
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250.118 Types of Equipment Grounding Conductors |
This subsection was completely revised to read: (11) MC Cable. The outer metal sheath of smooth or corrugated tube type MC cable can serve . . . |
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250.146 Connecting Receptacle Grounding Terminal to Box |
The first sentence of this rule in the 1999 NEC was revised to delete the words “or at.” This section now reads: (A) Surface M . . . |
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250.148 Continuity and Attachment of Equipment Grounding Conductors to Metal Boxes |
This section was completely reworded to read: Where circuit conductors are spliced, or terminated on equipment within a box, any separate . . . |
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285.1 Scope |
This Article covers the installation and connection requirements for TVSS that are permanently installed on premises wiring systems. Figure 285 . . . |
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285.21 Connection |
Where a TVSS is installed, it must be connected as follows: (A) Location. (1) Service Supplied Building or Structure. A TVSS can be . . . |
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300.4 Protection Against Physical Damage |
The word “listed” was added so that this subsection now reads: (B) Through Metal Framing Members. (1) Nonmetallic-Sheathed Ca . . . |
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300.5 Underground Installations |
Replace the word “service laterals” with “service conductors,” so that this section now reads: (D) Protection from . . . |
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300.7 Raceways Exposed to Different Temperatures |
The requirement for sealing against the flow of warm air to a colder section was completely reworded to read: (A) Sealing. Where po . . . |
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300.15 Boxes, Conduit Bodies, or Fittings – Where Required |
This subsection was completely revised to read: (I) Enclosures. A box or conduit body is not required where a splice is made in a . . . |
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310.8 Locations |
The text was revised to read: (D) Locations Exposed to Direct Sunlight. Insulated conductors and cables used where exposed to dir . . . |
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310.15 Ampacities for Conductors |
A new exception was added and it reads: (B) Table 310.16 Ampacity (2) Adjustment Factors. (a) More than Three Current-Carrying Conductors . . . |
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314.22 Exposed Surface Extensions |
The text was revised to read: Surface extensions from a flush-mounted box must be made by mounting and mechanically securing . . . |
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314.27 Outlet Boxes |
The exception to the rule that required boxes used at luminaire or lamp holder outlets be designed for the purpose was revised to read: (A) . . . |
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314.27 Outlet Boxes |
A new subsection was added and it reads: (B) Maximum Luminaire Weight. Outlet boxes that are properly supported in accordance with . . . |
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314.27 Outlet Boxes |
This subsection was revised to read: (D) Boxes for Ceiling Paddle Fan. Where a box is used as the sole support for a ceiling paddle . . . |
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320.17 Through or Parallel to Framing Members |
The text was revised to read: AC cable installed through or parallel to framing members must be protected against physical damage f . . . |
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320.30 Securing and Supporting |
The text was revised to read: (B) Unsupported. AC cable can be unsupported where the cable is: (1) Fished between concealed access . . . |
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334.10 Uses Permitted |
This subsection was completely revised to read: Type NM and NMC cables can be used in any of the following occupancies: (1) One and Two-Fa . . . |
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334.12 Uses Not Permitted |
The following text was added. (A) Types NM, NMC, and NMS. Types NM, NMC, and NMS cables shall not be used as open runs in dropped o . . . |
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334.17 Through or Parallel to Framing Members |
The text was revised to read: NM cable installed through or parallel to framing members must be protected against physical damage from penet . . . |
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338.10 Uses Permitted |
The text was revised to read: (B) Branch Circuits or Feeders (4) Installation Methods for Branch Circuits and Feeders. (a) Interior Installation . . . |
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342.30 Securing and Supporting |
This subsection was revised to read: (B) Supports (3) Vertical Risers. Exposed vertical risers for industrial machinery . . . |
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354.6 Listing Requirement |
This new section reads: NUCC and its associated fittings must be listed for the purpose. Figure 354–1Intent: . . . |
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362.10 Uses Permitted |
A new exception was added and it reads: (2) In buildings exceeding three floors. ENT must be installed concealed in walls, floors, . . . |
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362.10 Uses Permitted |
An exception was added and it reads: (5) Above Suspended Ceiling. ENT can be installed above a suspended ceiling if the suspended ceiling . . . |
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376.23 Wire way Sizing |
This section was revised to read: (A) Bending Radius. Where conductors are bent within a wire way, the wire way must be sized to meet . . . |
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376.23 Wire way Sizing |
This section was revised to read: (B) Wire way Used as Pull Box. Where insulated conductors 4 AWG or larger are pulled through . . . |
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392.3 Uses Permitted |
This section was revised to read: Cable trays can be used as a support system for services, feeders, branch circuits, communication . . . |
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392.6 Installation |
This section was revised to read: (J) Raceways, Cables, and Boxes Supported from Cable Trays. In industrial facilities where conditions . . . |
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400.7 Uses Permitted |
The word “stationary” was replaced with “utilization.” The subsection was revised to read: (A) Uses Permitted. |
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400.8 Uses Not Permitted |
This subsection was revised to read: Unless specifically permitted in 400.7, flexible cords and cables cannot be used for the following: ( . . . |
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404.8 Accessibility and Grouping |
The text to this section was revised to read: (B) Voltage Between Adjacent Devices. Snap switches shall not be grouped or ganged i . . . |
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404.9 Provisions for Grounding Switch Faceplates |
The text to this subsection was revised to read: (B) Grounding. Snap switches, including dimmer and similar control switches . . . |
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404.14 Rating and Use of Switches (including Dimmers) |
This new subsection reads: (E) Dimmer. General use dimmer switches must only be used to control permanently installed incandescent . . . |
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406.8 Receptacles in Damp or Wet Locations |
Parts of this section were revised to read: (B) Wet Locations (1) 15 and 20A Outdoor Receptacles. 15 and 20A, 125 and 250V receptacle . . . |
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406.8 Receptacles in Damp or Wet Locations |
Parts of this section were revised to read: (B) Wet Locations (2) Other Receptacles. All other receptacles installed in a wet . . . |
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408.21 Grounded Conductor Terminations |
Intent: This new section should ensure that grounded (neutral) conductors terminate within the panel board to an individual terminal. This has b . . . |
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408.21 Grounded Conductor Terminations |
Author’s Comment: If two grounded (neutral) conductors are connected to the same terminal, and someone removes one of the neutrals, . . . |
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430.52 Branch Circuit Short-Circuit Protection Device Rating |
Table 430-152, which contains the maximum rating or setting of motor branch-circuit short-circuit and ground-fault protective devices, was relocated t . . . |
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430.62 Feeder Protection Device Rating |
The first paragraph was revised to read: (A) Motors Only. A feeder supplying a specific fixed motor load(s) and consisting of conductors . . . |
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430.102 Disconnect Means Location |
This subsection and its exception were revised, and two Fine Print Notes were added. This subsection now reads: (B) Motor Disconnect. |
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440.14 Location |
A sentence was added to this section so that it now reads: Disconnecting means must be located within sight (within 50 ft) from and readily . . . |
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445.13 Ampacity of Generator Conductors |
The first sentence of this section was revised: The ampacity of the conductors from the generator terminals to the first distribution device . . . |
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500.2 Definitions |
A new definition for Electrical and Electronic Equipment was added and it reads: Electrical and Electronic Equipment. Materials, f . . . |
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500.8 Equipment |
Additional text was added to this subsection on the suitability of equipment and it reads: (A) Approval for Class and Properties. (1) Com . . . |
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501.5 Sealing and Drainage |
A new exception No. 2 was added to read: (A) Conduit Seals, Class I, Division 1 (4) Boundary Seal. A sealing fitting must be installed . . . |
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505.21 Multi wire Branch Circuits |
A new section covering the requirements for multi wire branch circuits located in Zone-classified systems reads: Multi wire Branch Circuits. . . . |
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511.3 Classifications of Locations |
This exception was revised to read: (B) Classified Locations (1) Up to 18 inches Above the Floor. For each floor, the entire are . . . |
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511.3 Classifications of Locations |
New subsection added for compressed natural gas and it reads: (B) Classified Locations (2) Within 18 in. of the Ceiling. Where C . . . |
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514.13 Disconnect for Maintenance and Service of Dispensing Equipment |
This section was revised to read: Each dispensing device must be provided with a means to remove all external voltage sources, including fe . . . |
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517.13 Grounding of Receptacles and Fixed Electric Equipment in Patient Care Areas |
The section was completely revised to read as follows: (B) Insulated Equipment Grounding Conductor. In areas used for patient care . . . |
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517.30 Essential Electrical Systems for Hospitals |
A new subsection was added and it reads: (E) Receptacle Identification. The cover plates for receptacles, or receptacles supplied . . . |
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525.32 Grounding Conductor Continuity Assurance |
A new requirement was added to require testing of the equipment grounding conductor. This new section reads: The continuity of the grounding . . . |
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527.3 Time Constraints |
The word “Christmas” was replaced with “holiday” so this section now reads: (B) 90-Day Rule. Temporary ele . . . |
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527.4 General |
A new sentence was added to this subsection, which reads: (J) Supports. Vegetation cannot be used for support of overhead spans of . . . |
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547.2 Definitions |
The definition for an Equipotential Plane was revised to read: Equipotential Plane. An area where wire mesh or other conductive el . . . |
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547.5 Wiring Methods |
This section was revised to require equipment enclosures, boxes, conduit bodies, and fittings installed in agricultural buildings to comply with the f . . . |
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547.5 Wiring Methods |
The GFCI requirements for agricultural buildings were revised to read: (G) Receptacles. All 15 and 20A, single-phase 125V general- . . . |
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550.25 Arc-Fault Circuit Interrupter Protection |
A new subsection was added and it reads: (B) Bedrooms of Mobile Homes and Manufactured Homes. All branch circuits that supply 15 an . . . |
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555.2 Definitions |
A new definition for Electrical Datum Plane was added and it reads: Electrical Datum Plane. The electrical datum plane is defined as . . . |
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555.17 Boat Receptacle Disconnecting Means |
The requirement for the boat disconnecting means was completely revised to read: (B) Location. The disconnecting means for a boat . . . |
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555.19 Boat Receptacle |
New text was added and it reads: (A) Boat Receptacles (4) Ratings. Receptacles that provide shore power for boats must be rated n . . . |
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600.21 Ballasts, Transformers, and Electronic Power Supplies |
This subsection was revised to read: (F) Suspended Ceilings. Ballasts, transformers, and electronic power supplies are permitted to . . . |
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604.6 Construction |
This section was completely revised to read: (E) Support. Manufactured wiring systems must be supported in accordance with the re . . . |
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640.6 Mechanical Execution of Work/Cable Support |
The text to this sec
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