Transcription
2011 National Electrical CodeChangesAlan Manche, P.E.Di t IndustryDirector,I d t StandardsSt d d2011 NEC Facts 5,016 public proposals,public commentsp 2,910 22 Certified Amending Motions at the NFPA Annual Meeting(7 were successful on the floor) 7 appeals to the Standards Council (all were denied) Issued by the NFPA Standards Council in August 2010 withan effective date of August 25, 2010 TimingTi i off ththe adoptiond ti off ththe NEC willill vary byb statet t andd locallljurisdictionSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201021
90.5(C) and (D) – Explanatory Material andAnnexes Fine Print Notes are nowInformational Notes FPN No.1 . Becomes . InformationalNote No. 1 Information only and not enforceable aspart of the code rules New (D) added for InformativeAnnexes Annexes A thru I are included forinformational purposes and are notenforceable as part of the code rulesSchneider Electric - Codes and Standards – 2011 NEC Changes – September 2010390.2(B)(5)(d) – Scope, Not Covered Revised to add reference to “writtenagreements” to permit exemption of utilityinstallations from code requirements Limited to: Purpose of communications, metering,generation, control, transformation,transmission, or distribution of electric energywhere legallyg y established easements or rightsgof-way cannot be obtained Federal lands, native American reservations,military bases, lands controlled by portauthorities and state agencies and lands ownedby railroadsSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201042
Article 100 – “Automatic”/ “Nonautomatic” Automatic PerformingP fi a ffunctioni withoutihthehnecessity of human intervention Non Automatic Requiring human intervention toperform a functionSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20105Article 100 - BathroomAn area consisting of a:ToiletUrinalPlus one ormore ofBasinTubShowerBidetSchneider Electric - Codes and Standards – 2011 NEC Changes – September 2010or similarplumbingfixture63
Article 100 – Service DefinitionsUnderground InstallationUtility ElectricSupply SystemService DropService Lateral(Article 100)(Article 100)Service Conductors – 230.9Overhead InstallationService PointUtility Conductors(Article 100)Premises WiringService Conductors,UndergroundService Conductors, Overhead(Article 230 Part II)(Article 230 Part III)Service EntranceConductorsConductors,Underground SystemService Entrance ConductorsConductors,Overhead System(Article 230 Part IV)(Article 230 Part IV)ServiceEquipmentArticle 230 Parts V, VI, VII and VIIISchneider Electric - Codes and Standards – 2011 NEC Changes – September 20107110.3(A)(1) – Examination of Equipment Informational Note revised toindicate that additionallimitations may be found in: Product instructions Included with the listing andlabeling informationSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201084
NEC 110.14 – Electrical Connections Connectors and terminals for conductors more finelystranded than Class B and Class C stranding as shown inChapter 9,9 Table 10,10 shall be identified for the specificconductor class or classes.Schneider Electric - Codes and Standards – 2011 NEC Changes – September 20109110.24 - Available Fault Current (A) Service equipment to be markedi theinh fifieldld withi h theh maximumiavailable fault current. Excludes Dwellings Must include date the fault currentcalculation was performed Sufficient durability to withstand theenvironment (B) Modifications Must verify or recalculate the value Adjust marking if necessarySchneider Electric - Codes and Standards – 2011 NEC Changes – September 2010105
110.28 Enclosure Types List of equipment to be marked with an enclosure-typeexpanded 110.28 relocated from 110.20 Enclosures of switchboards, panelboards, industrial controlpanels, motor control centers, meter sockets, enclosedswitches, transfer switches, power outlets, circuit breakers,adjustable-speed drive systems, pullout switches, portablepower distribution equipment,pq ptermination boxes, ggeneralpurpose transformers, fire pump controllers, fire pumpmotors, and motor controllers shall be marked with anenclosure-type number as shown in Table 110.28Schneider Electric - Codes and Standards – 2011 NEC Changes – September 201011110.31(A) – Electrical Vaults Where a vault is required or specifiedfor over 600V the section applies Construction Walls and roof – 3 hour construction Floors – not less than 4” thick, if constructedon upper floors must have a 3 hr rating Doors – tight fitting with 3 hr rating Can move to 1 hr rating if the vault isprotectedt t d withith automatictti firefi suppressioni Doors must be equipped with locks Transformer vaults must comply withArticle 450Schneider Electric - Codes and Standards – 2011 NEC Changes – September 2010126
200.4 – Neutral Conductors Prohibits a single neutralconductor for: More than one branch circuit More than one multi-wire branchcircuit More than one set ofungrounded feeder conductorsunless specifically permittedelsewhere in the codeSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201013200.7(C)(1) – White Conductor Identification 3 or 4-Way Switch Loop Reidentified white conductor incable assembly shall only beused to supply the switch Prohibited as the returnconductor from the switch tooutletSchneider Electric - Codes and Standards – 2011 NEC Changes – September 2010147
210.8 – GFCI Accessibility The GFCI shall be installed in areadily accessible location Circuit breaker GFCIs are, bydefault, readily accessible becauseof requirements in 240.24(A) Caution must be used in placingGFCI receptacles where they maybe blocked by items such as:GFCI behindvendingmachine wouldnot be readilyaccessible Furniture Refrigerators Vending machinesSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201015210.8(A)(7) – Sinks (Dwelling Units) GFCI protection is requiredfor all receptacles installedwithin 6’ of any sink Kitchens are still covered by210.8(A)(6) No exceptions for fixedequipment of special loadsBedroomGFCI requiredSchneider Electric - Codes and Standards – 2011 NEC Changes – September 2010168
210.8(B) – GFCI Additions (other than dwellingunits)( ) Indoor wet Locations(6)(7) Locker rooms withassociated showeringfacilities(8) Garages, service bays,and similar areas whereelectrical diagnosticequipment, electrical handtools, or portable lightingequipment are to be usedSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201017210.12(A) Ex #1 and #2– AFCI at the 1st OutletWiring from panel tofi outletfirstl must bbeinstalled in RMC, IMC,EMT, MC or steeljacketed AC cable.Must also have metaloutlet and junctionboxes.Also permitsnonmetallic conduitwhere encased in 2”of concreteProvides protection for:Install outletbranch circuit AFCIat the first outletSchneider Electric - Codes and Standards – 2011 NEC Changes – September 2010189
210.12(B) – Branch Circuit Extensions orInstallModifications (dwelling units)combinationAFCI Requires that AFCI protection beprovided where: Branch circuit wiring is modified,replaced or extended Applies to branch circuits in any of theareas specified in 210.12(A) The protection can be acombination AFCI at the origin ofthe branch circuitcircuit, or; It can be an Outlet Branch CircuitAFCI at the first receptacle outletof the branch circuitorInstall outletbranch circuitAFCIBranch circuit extensionSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201019210.52(A)(2)(1) – Wall Space Permits exclusion of fixedcabinets from wall spacedeterminationSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20102010
210.52(A)(4) – Countertop ReceptaclesProhibits using countertopreceptacle to meet the210.52(A) requirements forwall spaceKitchen counterWall space 2’Schneider Electric - Codes and Standards – 2011 NEC Changes – September 201021210.52(E)(3) – Balconies, Decks and Porches Removes exceptionfor small balconies,decks or porches At least onereceptacle isrequired to beinstalledSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20102211
210.52(G) – Accessory Buildings (one familydwellings) A receptacle is required tobe installed in an accessorybuilding if electric power isprovided to the accessorybuildingSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201023210.52(I) - Foyers Requires receptacles to beinstalled in foyers: Foyer area greater than 60 sq ft Foyer is not part of a hallway Required at each wall space 3’ ormore in width (unbroken bydoorways, floor to ceiling windows,etc.)Schneider Electric - Codes and Standards – 2011 NEC Changes – September 20102412
220.43(B) Exception – Track Lighting Example: 100’ of 120V tracklighting protected by a 20Aovercurrent device 2008 NEC Feeder Load (100/2ft) x 150VA 7,500VA 2011 NEC Feeder Load 20A x 120V 2,400VACalculation permitted to be based on the device that limits current to the track –could be the branch protective device or a supplemental device.Schneider Electric - Codes and Standards – 2011 NEC Changes – September 201025225.27 – Raceway Seal Raceways entering a building froman underground distribution systemshall be sealed Spare raceways must also be sealed Sealant to be identified for use with cableSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20102613
230.40 Exception No.1 – Number of ServiceEntrance Conductor Sets Buildings with more than one occupancy can have serviceentrance conductors run to each occupancy If the number of disconnect locations does not exceed six: 230.2(E) applies (plaques or directory at each service disconnectlocation) If number of disconnect locations exceeds six: All service along with any feeder or branch supplies must be clearlydescribed using suitable graphics, text or both. Plaque must be located in an approved, readily accessible location onthe building or structure Near as practicable to the point of attachment or entries for eachservice drop or lateral and for each set of overhead orunderground service conductorsSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201027230.40 – Exception No. 1Top ViewEnd of building viewOccupancy#1Occupancy Occupancy#2#3Occupancy#4Occupancy#5Occupancy Occupancy#6#7Occupancy#8Meters for eachoccupancyPlaqueService Disconnect(s) in each occupancyIncoming service lateralSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20102814
240.87 - Non-instantaneous Trip Requires additional measures beinstalled where a circuit breakerwithout an instantaneous tripfunction is used Requires one of the following or anapproved equivalent: (1) Zone-selective interlocking (2) Differential relaying (3) Energy-reducing maintenanceswitching with a local status indicatorSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201029240.91(B) – Devices Rated Over 800 Amperes Applies in Supervised Industrial Locations Only Permits rounding up of overcurrent devices rated over800A where: The ampacity of the conductors protected by the device are 95%or greater of the rating of the device The conductors are protected within recognized time vs. currentlimits for short circuit currents All equipment in which the conductors terminate is listed andmarked for the application Issues:I There are no products for this application There are no standards developed to support the listing andmarking Utilization of smaller conductors raises the operatingtemperature of the equipmentSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20103015
250.2 – Supply Side Bonding JumperTransformer for SeparatelyDerived SystemPanelboardEquipmentGround BarSupply side bonding jumperInstalled on supply side of service or within a service equipmentenclosure or for a separately derived systemSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201031250.21(C) – Marking (ungrounded systems) Marking for ungroundedsystems: Be marked “Ungrounded System” At the source or firstdisconnecting means of thesystem Sufficient durability to withstandthe environmentSchneider Electric - Codes and Standards – 2011 NEC Changes – September 2010UngroundedSystem3216
250.30(C) – Outdoor Source If source of separately derived system islocated outside building or structure: Grounding electrode connection must bemade at the source location Grounding electrode must comply with250.50Schneider Electric - Codes and Standards – 2011 NEC Changes – September 201033250.32(B) – Two or More Buildings/StructuresService Equip - Bldg #1Ex: Existing Installations still permitbonding of grounded conductor atsecond building meeting 3 conditionsSchneider Electric - Codes and Standards – 2011 NEC Changes – September 2010Bldg #21) No EGC2) No continuous metal path3) GFPE not installed on supply side3417
250.52(A)(2) – Metal Frame of Building orStructureTwo methods forbuilding steel to qualifyas a groundingelectrodeHold down boltsconnected to aconcrete encasedelectrode by welding,steel tie wires orother approvedmeans10’10’ or more in direct contact with the earthSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201035250.121 – Use of Equipment GroundingConductorsNeutralNeutralBarService PanelSubpanelProhibited touse equipmentgroundingconductor as agroundingelectrodeconductorFeeder EquipmentGrounding ConductorSchneider Electric - Codes and Standards – 2011 NEC Changes – September 2010Grounding ElectrodeConductor3618
300.4(E) – Raceways Under Roof Decking Requires a cable, raceway, or box to be installed notless than 38 mm (1½ in.) from the nearest surface ofthe metal-corrugated sheet roof decking.1-1/2 in.minimumRMC and IMC are not required to comply with the spacingSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201037300.4(H) – Structural JointsStructural join intended for expansion, contraction or deflectionListed expansion/deflection fitting or other approved meansSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20103819
Ampacity Tables Renumbered Extensive renumbering of thetables and related sections 310.15(B)(2)(a) Æ 310.15(B)(3)(a) 310.15(B)(2)(c) Æ 310.15(B)(3)(c) 310.15(B)(6) Æ 310.15(B)(7) 310.16 Æ310.15(B)(16)Schneider Electric - Codes and Standards – 2011 NEC Changes – September 201039310.15(B)(3)(a) – More than Three CurrentCarrying Conductors Requires that allconductors in theraceway or cable becounted Adjusted for 310.15(B)(5) –conductors that carry onlyimbalance Adjusted for 310.15(B)(6) –groundinggou d g aandd bobondingd gconductors Previous exceptions havebeen turned into positivelanguageSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20104020
310.15(B)(16) – Allowable Ampacity Table A few conductorampacities havebeen adjusted toharmonize with theCEC Ambient correctionfactors have beenmoved to their owntable[310.15(B)(2)(a)]Schneider Electric - Codes and Standards – 2011 NEC Changes – September 201041314.27(C) – Boxes at Ceiling Suspended(Paddle) Fan OutletsLocation acceptable for a ceilingsuspended fan in single or multifamily dwellingsSeparately switchedungrounded conductorsOutlet box list for sole supportof ceiling suspended (paddle)fanSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20104221
334.10(1) – Uses Permitted (NM Cable)One and two familyy dwellingsgDetached garages(of one or twof il dfamilydwellingslliStorage buildings (or oneor two family dwellings)Schneider Electric - Codes and Standards – 2011 NEC Changes – September 201043338.10(B)(4)(a) – Interior Installations (SEcable) Installation must comply withPart II of Article 334, excluding334.80 (ampacity limitations) If SE cable is installed in thermalinsulation, the ampacity shall be60C Still permits actual temperaturerating of cable to be used forampacityit adjustmentdj tt anddcorrectionSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20104422
Article 399 – Outdoor, Overhead Conductors,Over 600V New article for the installation ofoutdoor overhead conductors NEC was lacking detailed informationfor installations over 600V Single conductors, insulated, coveredor bare, installed outdoors on supportstructures 399.30 – Documentation of design By licensed professional engineer Engaged primarily in design of suchsystems Spacing between conductors Available upon request of AHJSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201045404.2(C) – Switches Controlling LightingLoadsGrounded circuit conductor shall be providedat the switch locationTo Lighting OutletRaceway installations exempt ifsized to accommodateextension of the groundedconductorNot required if cable assembliesenter the box through a framingcavity that is open at top orbottom on same floor levelNot requiredqif cable assembliesenter the box through a framingcavity that is open on one sideSwitch Loop fromlighting outletPower supplySchneider Electric - Codes and Standards – 2011 NEC Changes – September 20104623
406.4(D)(4) – AFCI Protection Must be replaced by: A listed outlet branch circuittype AFCI receptacle A receptacle protected by alisted outlet branch circuittype AFCI receptacle A receptacle protected by alisted combination type AFCIcircuit breaker Requirement becomeseffective January 1, 2014Receptacle being replacedand located in an areawhere the outlets arerequired to be AFCIprotected by other rules inthe NECSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201047406.4(D)(5) – Tamper Resistant Receptacles When replacement ismade, the receptaclemust be replaced with alisted tamper resistantreceptacleReceptacle located in areawhere tamper resistantreceptacles are required byother rules of the NECSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20104824
406.4(D)(6) – Weather Resistant ReceptaclesRequires weather resistant receptacles to be used as replacements wherethe receptacle is located where weather resistant receptacles are required byother NEC rulesSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201049406.9(B)(1) - 15- and 20-Ampere Receptaclesin a Wet Location Adds a new requirement that in other than one and twofamily dwellings: Outlet box hood must be listed Where installed on an enclosure supported from grade as describedin 314.23(B) or 314.23(F), the hood must be identified as “extra-duty”Enclosure supportedppfrom grade by woodbrace – 314.23(B)Listed“extra-duty”outlet coverSchneider Electric - Codes and Standards – 2011 NEC Changes – September 2010Raceway supportedenclosure - 314.23(F)5025
406.12 – Tamper Resistant Receptacles inDwelling Units Adds new exception to TRrequirement in dwelling units. TR not required on: Receptacles located above 5 ½ feetabove the floor Receptacles that are part of aluminaire or appliance A single receptacle or duplexreceptacle for two applianceslocated in a dedicated space Not easily moved Cord and plug connected Nongrounding receptacles used asreplacementsSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201051406.13 – Tamper Resistant Receptacles inGuest Rooms and Guest Suites 125V, 15 and 20A nonlockingreceptacles Located in guest rooms andguest suites Listed TR receptaclesrequiredSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20105226
406.14 – Tamper Resistant Receptacles inChild Care Facilities Includes all child carefacilities 125V, 15 and 20Anonlocking receptacles Listed TR receptaclesrequiredSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201053408.4(B) – Source of Supply (identification) Requires marking to indicate thedevice or equipment where thepower supply originates Includes all switchboards andpanelboards supplied by a feeder One and two family dwellings notincludedSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20105427
409.110(3) – Marking (industrial control panels) Panels supplied by more thanone source If more than one disconnectingmeans must be opened todisconnect all power Panel must be marked toindicate that more than oneg means is requiredqdisconnectingto be operated to de-energizethe equipmentSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201055410.130(G)(1) – Disconnecting Means(luminaires) Requires installation of adisconnecting means onexisting luminaires: When ballast is changedand; Luminaire does not have adisconnecting meansinstalledSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20105628
430.22(G) – Conductors for Small Motors (1) - #18 AWG permitted where Installed in a cabinet or enclosure Part of jacketed multi-conductor cable or flexible cord Motor circuit FLA greater than 3.5 and up to 5A Circuit protected by 430.52 Provided with minimum Class 10 overload protection OCP meets 240.4(D)(1)(2) Motor circuit with ampacity of 3.5A or less Circuit protected by 430.52 Provided with minimum Class 20 overload protection OCP meets 240.4(D)(1)(2) (2) – covers #16 AWGSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201057450.14 – Transformer Disconnect A disconnecting means required fortransformers Must be located either in sight of thetransformer or Remotely provided with capability ofbeing locked in the off position Locking means required to remain inplaceorDisconnect located withinsight of the transformerDisconnectcapable of beinglocked in the offpositionSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20105829
514 – Circuit Disconnects514.11 – Emergency Controls Readily Accessible and Remote from pump514.13 – Provisions for Maintenance Means shall be capable of being locked in theopen position Both require simultaneous disconnectfor all power and communicationscircuits going to dispenser Clarifies video and data also includedSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201059517.13(B) – Grounding of Receptacles inPatient Care Areas The separate insulated equipmentgrounding conductors must beconnected to: The grounding terminal of thereceptacle The metal box or enclosureSeparate EquipmentGrounding ConductorMetal ConduitSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20106030
517.16 – Receptacles with Insulated Ground Receptacles in patient care areas prohibited to have aninsulated ground terminalDiagram Courtesy of Pass & SeymourSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201061517.17(B) – Feeders (Ground Fault Protection) Now clarifies that the prohibitionof 2nd level of ground fault is onlyon the load side of an essentialsystem transfer switch. 2nd levels of GFPE arepermitted elsewhere in theessential system Can help with coordination Article 700 does not prohibit GFPEon emergency systemSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20106231
517.17(C) - Selectivity Deleted the 6 cycles of separationfor the GFPE selectivity Now requires: Conformance to manufacturersrecommendations Consider all required tolerances andoperating time to achieve 100%selectivitySchneider Electric - Codes and Standards – 2011 NEC Changes – September 201063547.5(G) – Agricultural Buildings - GFCI Exception to eliminate GFCI protection has been deletedg p, 15- and 20-amperepggeneral All 125-volt,, single-phase,purpose receptacles required to have GFCI protection: Areas having an equipotential plane Outdoors Damp or wet locations Dirt confinement areas for livestockSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20106432
555.3 – Marinas - Ground Fault Protection Main overcurrent protective devicefeeding the marina: Required to have Ground FaultProtection of Equipment (GFPE) GFPE level shall not exceed 100mA GFPE protection of each individualfeeder or branch circuit is permitted asan alternative GFCI protection still required forreceptacles in accordance with555.19(B)(1)Schneider Electric - Codes and Standards – 2011 NEC Changes – September 201065590.6(A)(3) – Receptacles on 15KW or lessPortable Generator All 125- and 125/250- volt, single-phase, 1520-, and 30-ampere receptacle outlets,shall have GFCI protection on the generator Challenges Installing GFCI on the generator means that theneutral of the generator will be bonded Bonding the neutral creates issues for transferequipment that does not switch the neutralbecause neutral would now be bondeddownstream of the service disconnect Will now need transfer equipment that switchesthe neutral if intended to be used with a portablegeneratorSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20106633
600.33 LED Signs New provisions governing the wiring method and materialsfor light-emitting diode (LED) type sign systems have beenadded to Article 600 Clear and concise requirements for Class 2 LED circuits areneeded for electric signs and outline lighting LED lighting systems have become an increasingly popularlight source over the past decade or so This new section is designed to consolidate the majority ofthe rules for Class 2 power limited wiring used in signs andoutline lighting into Article 600Schneider Electric - Codes and Standards – 2011 NEC Changes – September 201067600.33 LED Signs600.33 LED Sign Illumination Systems, Secondary Wiring(Electric Signs and Outline Lighting)The wiring methods and materials shall be installed inaccordance with the sign manufacturer’s installationinstructions using any applicable wiring methods fromChapter 3 and the requirements for Class 2 circuits containedin Part III of Article 725.((A)) Insulation and Sizingg of Class 2 Conductors(B) Installation(C) Protection Against Physical Damage(D) Grounding and Bonding(See NEC for complete text)Schneider Electric - Codes and Standards – 2011 NEC Changes – September 20106834
625.2 – Definitions Electric Vehicle now includes Electric motorcycles Plug-in hybrid electric vehicles Plug-in Hybrid Electric Vehicle (PHEV) A hybrid vehicle intended for on-road usewith the ability to store and use off-vehicleelectrical energy in the rechargeable energystorage system and has a second source ofmotive power Rechargeable Energy Storage System A power source that can be charged anddischarged. Examples include batteries, capacitors,and electromechanical flywheelsSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201069645.2 – Definitions (ITE) Critical Operations Data System requires continuous operation for thereasons of public safety, emergencymanagement, national security, orbusiness continuity Zone A physically identifiable area (such asbarriers or separation by distance) withinan information technologygy equipmentroom with dedicated power and coolingsystems for the information technologyequipment or systems.Schneider Electric - Codes and Standards – 2011 NEC Changes – September 20107035
645.10 – Disconnecting Means (A) Remote Disconnect Controls Allows Emergency Power Off actuator to be located in an approvedalternative location (rather than at principal exit doors) (D) Critical Operations Data Centers are not required to haveremote disconnect controls where: Approved procedure Qualified personnel continuously available to meet emergencyresponders FireFi ddetectiont ti andd suppressioni systemst Cables installed under a raised floor, other than branch circuit wiringand power cords installed in compliance with 645.5(D)(2) or (3), are incompliance with 300.22(C) , 725.154(A), 770.154(A), or 800.154(A).Schneider Electric - Codes and Standards – 2011 NEC Changes – September 201071645.25 – Engineering Supervision Feeder and service loadcalculations for new orexisting loads shall bepermitted by a licensed andqualified professionalengineer Feeders shall not be requiredto be of greater ampacity thanthe service conductors.conductors Service or feeder conductorsshall be permitted to haveneutral load determined by220.61.Schneider Electric - Codes and Standards – 2011 NEC Changes – September 20107236
670.5 – Short Circuit Current Rating Industrial machinery is not permitted to be installed where itdoes not have a short circuit current rating adequate for theavailable fault current Short-circuit current rating for the machinery is required by670.3(A)(4).Schneider Electric - Codes and Standards – 2011 NEC Changes – September 201073680.2 – Low Voltage Contact Limit A voltage not exceeding the followingvalues: (1) 15 volts (RMS) for sinusoidal ac (2) 21.2 volts peak for nonsinusoidal ac (3) 30 volts for continuous dc (4) 12.4 volts peak for dc that isinterrupted at a rate of 10 to 200 Hz.Schneider Electric - Codes and Standards – 2011 NEC Changes – September 20107437
680.10 – Underground Wiring Locations –Minimum Cover Depths Revises the minimum coverdepth table to permit NMconduit buried under 4” thickconcrete slab Conduit depth permitted tobe 6 inches Concrete slab must extendyarea ofat least 6” beyondunderground installationSchneider Electric - Codes and Standards – 2011 NEC Changes – September 201075680.26(B)(7) – Equipotential Bonding Adds to the list of fixed metal parts thatare required to be bonded around a pool: Metal awnings Metal fences Metal door and window frames Deletes the words “all metal parts” but nowincludes the words “including, but not limitedto ” Exceptions remain for: Parts separated by a permanent barrier Parts more than 5 feet horizontally from thewalls of the pool Parts more than 12 feet vertically frommaximum water levelSchneider Electric - Codes and Standards – 2011 NEC Changes – September 20107638
680.43 Exception No. 2 - Indoor Installations Basic rule requires indoor installationsof spas and hot tubs to com
2011 National Electrical Code Changes Alan Manche, P.E. Di t I d t St d dDirector, Industry Standards 2011 NEC Facts 5,016 public proposals 2,,p910 public comments 22 Certified Amending Motions at the NFPA Annual Meeting (7 were successful on the floor) 7 appeals to the Standards Council (all were denied)File Size: 1MB
