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2005

Permission To Use Graphics: To receive permission to use any of the following graphics in a newsletter or other publication simply click the graphic link that you are interested in and fill out the request form. [ You Need Only Complete the Form One Time ] These graphics are based on the 2005 NEC.

NOTE: The images on this page have been extracted from Mike's textbooks.


  90.2 Scope of NEC  New FPN identifies the type of organizations that may be exempt from the NEC requirements. (B) What Isn’t Covered. The < . . .  
  Handhole Enclosure  New definition “handhole enclosure” was added because the term will be used in the following:
  • Enclosure not required for splices, . . .  
  Qualified Person  FPN was added to the definition of ”qualified person” to give examples of the type of safety training required for a person to be considered qu . . .  
  Separately Derived System  The definition for a “separately derived system” was revised by eliminating the list of electric energy power sources that constitute a separat . . .  
  Supplementary Overcurrent Protective Device  The new term “supplementary overcurrent protection device’ clarifies the difference between “supplementary overcurrent protective device” a . . .  
  System Bonding Jumper  A new term “system bonding jumper” was added for use with separately derived systems. Previously the term “main bonding jumper” was used to . . .  
  Device  The definition of the term “device” was revised to clarify that electronic and electromechanical equipment used to control electric energy is c . . .  
  Dwelling Unit  The definition of a “dwelling unit” was revised to make it consistent with other NFPA standards, like NFPA 101, Life Safety Code, withou . . .  
  Solidly Grounded  The term “solidly grounded” was contained in 230.95, but it was relocated to Article 100 because it’s used in at least eleven articles. . . .  
  Grounding Electrode  A new term “grounding electrode” was added to Article 100 because it’s used in twenty-three articles from Article 250 through Article 830.
  Grounding Electrode Conductor  The definition for “grounding electrode conductor” was reworded to clarify that the conductor that connects the building or structure disconnec . . .  
  Guest Room  The new term “guest room” was added because it’s used in Articles 210, 220, and 240. The definition matches the term found in NFPA 101, Li . . .  
  110.16 Flash Protection Warning  The term “meter socket enclosures” was added to the list of equipment on which field marking is required to warn qualified persons of potential . . .  
  110.26 Spaces About Electrical Equipment  Part II. 600V, Nominal or Less Revised text allows the area housing electrical equipment to be controlled by locks of any type, including a comb . . .  
  200.6 Means of Identifying Grounded Neutral Conductors  The means of identification of grounded neutral conductors larger than 6 AWG was revised to allow gray as well as white markings at terminations.
  200.7 Use of White or Gray Color  New sentence added to remove confusion and misinterpretation in the field on the requirements for reidentifying white conductors in cable assemblie . . .  
  210.52 Dwelling Unit Receptacle Outlets  Part III. Required Outlets New exception and diagram added to clarify that a countertop receptacle outlet isn’t required on a wall directly be . . .  
  210.52 Dwelling Unit Receptacle Outlets  A new exception permits the required bathroom receptacle outlet to be mounted on the basin cabinet. This exception provides an alternative location . . .  
  210.52 Dwelling Unit Receptacle Outlets  New rule requires at least one outdoor receptacle outlet for each grade level dwelling unit with an individual entrance. This will help remove the . . .  
  210.63 Heating, Air-Conditioning, and Refrigeration Equipment (HACR)  New exception clarifies that a receptacle outlet isn’t required within 25 ft of evaporative coolers at one- and two-family dwellings.
  210.70 Lighting Outlets Required  Revised text and two new exceptions clarify that lighting outlets in guest rooms or guest suites provided with permanent provisions for cooking mus . . .  
  210.4 Multiwire Branch Circuits  Part I. General Provisions New FPN alerts the Code user to ensure that the continuity of the grounded neutral conductor of a multiwire ci . . .  
  210.5 Identification for Branch Circuits  The requirement for branch-circuit identification was relocated from 210.4(D) to 210.5(C) and the text expanded to require circuit identification f . . .  
  210.7 Branch-Circuit Requirements  Changing the word “receptacle” to “device or equipment” was intended to bring 210.7 in line with other NEC sections to create more c . . .  
  210.8 GFCI Protection  Revised text to require all 15 and 20A, 125V receptacles within 6 ft of the dwelling unit laundry or utility sink to be GFCI protected. This is bec . . .  
  210.8 GFCI Protection  The GFCI protection requirement for commercial kitchens was clarified by adding a definition of a kitchen. New requirement expands the GFCI protect . . .  
  210.12 Arc-Fault Circuit-Interrupter Protection  Revised text to require, after January 1, 2008 that all dwelling unit bedroom branch-circuit AFCI protection devices must be listed as a “Combina . . .  
  215.2 Minimum Rating and Size  New sentence requires the feeder grounded neutral conductor to be sized so that it has adequate fault-current capacity, in the event a short circui . . .  
  215.12 Identification for Feeders.  New section contains the identification requirements for feeder conductors so that they are similar with the branch-circuit identification requirem . . .  
  225.17 Masts as Supports  Part I General Requirements Overhead feeder and branch-circuit final spans are sometimes attached to the building through the use of masts. This . . .  
  230.71 Number of Disconnects  Part VI. Service Equipment – Disconnecting Means The disconnecting means for transient voltage surge suppressors (TVSS) are not counted as a s . . .  
  230.82 Equipment on the Supply Side  New subsection permits the installation of a meter disconnect switch ahead of the service disconnect. Electrical equipment must not be . . .  
  240.20 Ungrounded Conductors  Part II. Location The word “approved” was replaced with “identified for the purpose.” The result… nails, screws, or wire are no longer . . .  
  240.21 Overcurrent Protection Location in Circuit  New sentence confirms that the “next size up” protection device rule of 240.4(B) doesn’t apply to feeder tap conductors. (B) Fee . . .  
  240.21 Overcurrent Protection Location in Circuit  New text clarifies that an individual transformer can supply more than a single load and the “next size up” protection of conductor rule contai . . .  
  240.24 Location of Overcurrent Protection Devices  New text specifies the maximum height that an overcurrent device can be installed, and still be considered “readily accessible.” New text coord . . .  
  240.24 Location of Overcurrent Protection Devices in Premises  Overcurrent devices must not be located in bathrooms of guest suites, as well as guest rooms of hotels and motels. (E) Not in Bathroom . . .  
  250.34 Generators – Portable and Vehicle-Mounted  Revision clarifies when portable and vehicle-mounted generators are not required to be grounded to a grounding electrode. (A) Portable . . .  
  250.50 Grounding Electrode System  Part III. Grounding Electrode System and Grounding Electrode Conductor The words “if available” have been replaced with “are present.” T . . .  
  250.52 Grounding Electrodes  The language in the 2002 NEC was vague and subject to wide interpretation as it described when the metal frame of a building or structure co . . .  
  250.52 Grounding Electrodes  New FPN reminds the Code user that gas piping that is likely to become energized must be ”bonded” in accordance with the 250.104(B). < . . .  
  250.54 Supplementary Electrodes  Revision to help the Code user understand that an equipment grounding (bonding) conductor is intentionally constructed to assist in clearing . . .  
  250.64 Grounding Electrode Conductor Installation  New text permits the grounding electrode conductors and bonding jumpers to terminate to a busbar as an alternative method. (C) Continu . . .  
  250.64 Grounding Electrode Conductor Installation  The revisions clarify when the raceway for the grounding electrode conductor must be bonded at each raceway/cable termination between the service e . . .  
  250.100 Bonding – Hazardous (Classified) Locations  Part V. Bonding The text was revised to clarify the bonding requirements of metal raceways that enter a hazardous (classified) location. An addi . . .  
  250.104 Bonding of Piping Systems and Exposed Structural Metal  The words “that may become energized” were replaced with “is likely to become energized” to editorially clarify when the metal piping syste . . .  
  250.104 Bonding of Piping Systems and Exposed Structural Metal  The words “that may become energized” were replaced with “is likely to become energized” to editorially clarify when structural metal must . . .  
  250.2 Definitions  Part I. General Additional text helps the Code user understand that the purpose of the effective ground fault current path is to help cle . . .  
  250.104 Bonding of Piping Systems and Exposed Structural Metal  The structural metal member bonding requirements that were located in 250.30(A)(3)(d) and 250.104(A)(1) were combined and relocated to 250.104(D) t . . .  
  250.118 Types of Equipment Grounding (Bonding) Conductors  Part VI. Equipment Grounding (Bonding) and Equipment Grounding (Bonding) Conductors New text specifies when an equipment (bonding) conductor is . . .  
  250.119 Identification of Equipment Grounding (Bonding) Conductor  New sentence to make it clear that conductors that have an outer finish that is green or green with one or more yellow stripes cannot be used for u . . .  
  250.122 Sizing Equipment Grounding (Bonding) Conductor  New rule describes how the equipment grounding (bonding) conductors for feeder taps are to be sized. (G) Feeder Tap Conductors.
  250.140 Grounding (Bonding) – Ranges, Ovens, and Clothes Dryers  Part VII. Methods of Equipment Grounding (Bonding) The section on grounding (bonding) of ranges, ovens, and clothes dryers was rewritten to make . . .  
  250.146 Receptacle Grounding (Bonding)  New sentence clarifies how to ensure direct metal-to-metal contact between the metal mounting yoke of a receptacle and the metal box when a bonding . . .  
  250.4 General Requirements for Grounding and Bonding  Change clarifies that swift operation of an overcurrent protection device in the presence of a ground-fault depends upon the existence of an effect . . .  
  250.8 Termination of Grounding and Bonding Conductors  Revised text clarifies that terminals for grounding conductors or bonding jumpers must be attached to enclosures in a suitable method to ensure an . . .  
  250.24 Grounding and Bonding at Service Equipment  Part II. System Grounding (Bonding) Editorial - the term “neutral conductor” was replaced with “grounded conductor.” According to the IE . . .  
  250.28 Main Bonding Jumper and System Bonding Jumper  To avoid confusion when dealing with bonding jumpers, the requirement for the system bonding jumper was added to this section. System . . .  
  250.30 Grounding and Bonding of Separately Derived AC Systems  Text clarifies the method of sizing equipment bonding jumpers when the separately derived system conductors are run in parallel. And the text relat . . .  
  250.32 Buildings or Structures Supplied by a Feeder or Branch Circuit.  A new sentence was added to the exception to clarify that a grounding electrode isn’t required at a remote building or structure supplied by a si . . .  
  300.4 Protection Against Physical Damage  Part I. General Requirements Text expands the requirements to furring strips when 11/4” clearance is required for cables run parallel to frami . . .  
  300.6 Protection Against Corrosion and Deterioration  This section was rewritten to ensure that raceways and fittings are properly protected against corrosion and deterioration. In addition, this secti . . .  
  300.11 Securing and Supporting  Wording added to clarify that independent support wires for electrical equipment and wiring can be attached to the ceiling grid. (A) S . . .  
  300.18 Inserting Conductors in Raceways  New exception clarifies when raceways aren’t required to be complete before the installation of circuit conductors. (A) Complete Run . . .  
  310.8 Locations  This subsection was reorganized in a list format to clarify the requirements for protecting conductors against ultraviolet (UV) rays from direct su . . .  
  310.10 Insulation Temperature Limitation  New FPN alerts the designer to consider elevated ambient temperatures when raceways are installed outdoors in direct sunlight in close proximity to . . .  
  310.15 Conductor Ampacity  Text added to clarify how each current-carrying conductor of a parallel conductor set is to be treated when applying the ampacity adjustment factor . . .  
  312.4 Repairing Gaps in Plaster, Drywall, or Plasterboard  New rule added to require the sealing of gaps or open spaces around cabinets or cutout boxes having a flush-type cover, as is required around outle . . .  
  314.1 Scope  Part I. Scope and General The scope of Article 314 was expanded to include the requirements for handhole enclosures. See 314.30 for details. . . .  
  314.16 Number of 6 AWG and Smaller Conductors in Boxes and Conduit Bodies  Part II. Installation New sentence requires conductor volume calculations to be increased in size when conductors are looped or run unbroken thr . . .  
  314.20 Boxes Recessed in Walls or Ceilings  Additional text clarifies the setback requirements for plaster rings, extension rings, or listed extender, as well as boxes from combustible surfac . . .  
  314.21 Repairing Gaps Around Boxes  Additional text clarifies when gaps around boxes must be repaired. Gaps around boxes recessed in plaster, drywall, or plasterboard h . . .  
  314.27 Outlet Boxes  The support requirements for a ceiling paddle fan previously contained in 422.18 were relocated to 314.27(D). This makes it unnecessary to use two . . .  
  314.30 Handhole Enclosures  New section contains the requirements for handhole enclosures. Handhole enclosures must be designed and installed to withstand all l . . .  
  320.30 Secured and Supported  Part II. Installation This section was reorganized with editorial changes to add clarity and uniform interpretation. New subsection (A) General, . . .  
  320.80 Conductor Ampacities  Changes clarify when the 90°C conductor insulation ampacity as listed in Table 310.16, can be used for conductor ampacity adjustment or correction . . .  
  330.30 Secured and Supported  Part III. Construction Specifications This section was reorganized with editorial changes to add clarity and uniform interpretation. New subsect . . .  
  330.108 Equipment Grounding (Bonding)  Section rewritten to clarify when Type MC cable is permitted to serve as an equipment grounding (bonding) path. Where MC cable is us . . .  
  334.15 Exposed  Part II. Installation New rule permits NM cable in an unfinished basement to be installed into a raceway when coming down a wall, but the cable . . .  
  334.30 Secured or Supported  New paragraph clarifies that NM cables installed within a raceway [334.15(C)] isn’t required to be secured within the raceway. Typ . . .  
  334.80 Ampacity  A new paragraph requires conductors to have their ampacity adjusted, when more than one NM cable is bundled together as they pass through a fire- o . . .  
  348.30 Secured and Supported  Part II. Installation Revisions to Exception No. 2 relax the requirements for securing flexible metal conduit at terminations where flexibility . . .  
  376.23 Wireway Sizing  Part II. Installation Revisions to this rule should clear up the issue regarding the sizing of metal wireways as it relates to conductor bending . . .  
  400.5 Ampacity of Flexible Cords  New rule requires conductor ampacity correction when flexible cords are used in an ambient temperature above 86°F. Tables 400.5(A) and . . .  
  404.9 Switch Cover Plates  Exception revised to permit metal switch cover plates at an outlet box where a grounding (bonding) means doesn’t exist, but only where the circui . . .  
  406.4 Receptacle Mounting  Text added to recognize the generally accepted practice, that receptacles mounted in boxes supported by a pendant flexible cord is permitted. . . .  
  406.8 Receptacles in Damp or Wet Locations  The word “outdoors” was deleted from this rule. The effect? All 15 and 20A 125V and 250V receptacles installed in a wet location (indoor or out . . .  
  406.8 Receptacles in Damp or Wet Locations  Revised wording clarifies where a receptacle isn’t permitted in a bathroom. (C) Bathtub and Shower Space. Receptacles must . . .  
  408.4 Circuit Directory or Circuit Identification  Part I. General This section on circuit identification was rewritten to improve safety by ensuring that workers don’t have to guess which brea . . .  
  408.7 Unused Openings  New section specifies that unused openings for circuit breakers and switches must be closed in a manner approved by the authority having jurisdicti . . .  
  410.110. Listing of Decorative Lighting  XVI. Decorative Lighting and Similar Accessories Decorative lighting is now required to be listed for the purpose. Decor . . .  
  410.1 Scope  Part I. General The scope of Article 410 has been expanded to include decorative lighting products, lighting accessories for temporary seasonal . . .  
  410.4 Luminaires in Specific Locations  Part II. Luminaire Locations The text was modified to clarify the types of luminaires not permitted within 3 ft horizontally and 8 ft vertically . . .  
  410.4 Luminaires in Specific Locations  New subsection added to clarify when a lamp shield for mechanical protection is required for mercury vapor or metal halide lamps.
  410.14 Connection of Electric-Discharge Luminaires  Part III. Luminaire Outlet Boxes and Covers Additional text clarifies that the branch-circuit wiring must be accessible when electric-discharge . . .  
  410.30 Cord-Connected Luminaires  Part VI. Wiring of Luminaires Additional text clarifies that flexible cords with manufactured wiring system connectors (Relox®) can be used for . . .  
  410.73 General  Part XIII. Electric-Discharge Lighting (1,000V or Less) New rule specifies when luminaires with metal halide lamp are to be provided with a meth . . .  
  422.13 Storage Water Heaters  Part II. Branch-Circuit Requirements Text was revised to specify that a fixed storage water heater of 120 gallons or less is to be considered a . . .  
  422.16 Flexible Cords  New rule allows range hoods to be cord-and-plug connected, if they comply with new stringent requirements. (B) Specific Appliances.< . . .  
  424.3 Branch Circuits  Part I. General Editorial change to clarify that fixed electric space-heating equipment is a continuous load for branch circuit conductor sizing . . .  
  430.32 Overload Sizing – Continuous-Duty Motors  Part III. Overload Protection Text revised to clarify that overload protection is required for continuous duty motors rated more than 1 hp, but . . .  
  445.18 Disconnecting Means  Change permits a single generator to have multiple disconnecting means to allow flexibility and to provide a safer environment when maintenance is . . .  
  501.15 Sealing and Drainage  Part II. Wiring Text revisions clarify that when a conduit leaves a Class I, Division 2 location to an unclassified location, the required bound . . .  
  511.3 Classification of Hazardous Areas  This section was reorganized so that text related to unclassified locations is now located in 511.3(A) and text related to classified locations is . . .  
  511.3 Classification of Hazardous Areas - Continued  (6) Flammable Liquids Having Flash Points Below 100 degrees F. Areas where flammable liquids having a flash point below 100°F, such as gasoline . . .  
  513.12 GFCI Protected Receptacles  New section requires GFCI protection for 15 and 20A, 125V receptacles where aircraft might undergo service, repairs, or alterations.
  514.8 Underground Wiring  Note added to Table 514.3 to identify the hazardous (classified) area around fuel dispensing facilities on floating docks. Text revised to clari . . .  
  517.18 General Care Areas  Part II. Wiring and Protection Additional text expands the required use of tamper resistant receptacles or tamper resistant covers in pediatric . . .  
  525.23 GFCI Protection  This section was extensively rewritten to clarify where GFCI protection is required, where GFCI protection is not required, and where GFCI protecti . . .  
  547.5 Wiring Methods  The rules for GFCI protection of receptacles were relocated from 547.10(B) to 547.5(G). In addition, general-purpose receptacles located in dirt co . . .  
  547.10 Equipotential Planes and Bonding of Equipotential Planes  Section revised to clarify when an equipotential plane is required in livestock buildings. Previous Codes required an equipotential plane where met . . .  
  551.71 Type of Receptacles Required  VII. Recreational Vehicle Parks Text revised to increase the number of 50A, 125/250V receptacle recreational vehicle sites from 5 percent to 20 . . .  
  555.22 Repair Facilities  Electrical wiring and equipment at facilities used to repair marine craft must now comply with the installation requirements of Article 511 Commerc . . .  
  590.4 General  Revised text clarifies that Type NM cable used for temporary feeder installations isn’t limited by building height, construction type, or conceal . . .  
  590.4 General  New exception recognizes that in many cases the only available support for holiday branch circuit lighting is live vegetation (trees). < . . .  
  604.6 Construction  The title and text of this section were changed to require manufactured wiring systems to be secured, as well as supported, in accordance with the . . .  
  680.26 Equipotential Bonding  Equipotential grid now required in or under the permanently installed pool, outdoor spa, and outdoor hot tub deck to help mask stray voltage from u . . .  
  680.32 GFCI Protected Receptacles  Part III. Storable Swimming Pool Additional text requires GFCI protection for receptacles located within 20 ft of a storable pool.
  680.34 Receptacle Locations  Additional text to specify the minimum distance a receptacle is permitted from a storable pool. Receptacles must not be located less . . .  
  680.58 GFCI Protected Receptacles  Part V. Fountains The GFCI protection requirement for 15 or 20A receptacles within 20 ft of fountains was relocated to this section from 680.22( . . .  
  680.12 Maintenance Disconnecting Means  This rule was revised to clarify that the permanently installed pool, storable pool, outdoor spa and hot tub, or fountain equipment maintenance dis . . .  
  680.22 Area Lighting, Receptacles, and Equipment  Text added to clarify that GFCI protection is only required for 15 and 20A, 125V receptacles located within 20 ft of the inside walls of a permanen . . .  
  680.26 Equipotential Bonding  Change requires an equipotential bonding grid be installed to reduce voltage gradients in and around permanently installed pools, outdoor spas, and . . .  
  695.6 Power Wiring  The text was revised to alert the Code user that the branch circuit conductors for a fire pump motor are sized in accordance with 430.22. In . . .  
  725.3 Other Articles  Part I. General Text revised to specify that accessible portions of abandoned Class 2, Class 3, and PLTC cables must be removed. . . .  
  725.3 Other Articles  Changes clarify the types of cables and raceways permitted in ducts, plenums, and other space used for environmental air. (C) Ducts, . . .  
  725.61 Applications of Class 2 and Class 3 Cables  New sentence identifies the type of nonmetallic raceway containing Class 2 or Class 3 cables that is permitted in “other spaces used for environm . . .  
  725.82 Listing and Marking of Class 2 and Class 3 Cables  Part VI. Listing Requirements New subsections added to recognize the use of raceways designed for Class 2 and Class 3 cables. . . .  
  760.3 Other Articles  Part I. General Text revised to specify that accessible portions of abandoned fire alarm cables must be removed. Only those sectio . . .  
  760.21 GFCI and AFCI Protection  Part II. Nonpower-Limited Fire Alarm (NPLFA) Circuits New rule prohibits AFCI protection of the 120V circuit that supplies power for a nonpower- . . .  
  770.3 Other Articles  Part I. General Text revised to specify that the accessible portion of abandoned optical fiber cables must be removed. (A) Spread . . .  
  800.3 Other Articles  Part I. General Text revised to specify that the accessible portion of communications cables must be removed. (C) Spread of Fire . . .  
  800.100 Cable and Primary Protector Grounding  Part IV. Grounding Methods New FPN alerts the Code user that limiting the length of the grounding conductor for the primary protector sho . . .  
  810.21 Grounding Conductors  Part II. Receiving Equipment − Antenna Systems New subsection clarifies the type of grounding electrode termination fitting that is suitab . . .  
  820.3 Other Articles  Part I. General Text revised to clarify that the accessible portion of abandoned coaxial cables must be removed. (A) Spread of Fi . . .  
  820.100 Cable Grounding  Part IV. Grounding Methods New FPN alerts the Code user that limiting the length of the grounding conductor should reduce voltages that m . . .  
  820.182 CATV Raceways  Part VI. Listing Requirements New subsections added to recognize the use of raceways designed for coaxial cables. (A) P . . .  
  830.1 Scope  Part I. General Article 830 contains the installation requirements for network-powered broadband communications circuits that provide voice, aud . . .