National Fire Protection Association
NEC
The U.S. standard for electrical wiring and installation, published by the NFPA as NFPA 70.
Sections and parts cited
NEC 100NEC 110NEC 110.3(B)NEC 110.5(H)NEC 110.9NEC 110.10NEC 110.14NEC 110.14(C)NEC 110.14(D)NEC 110.15NEC 110.21(B)NEC 110.24NEC 110.24(B)NEC 110.25NEC 110.26NEC 110.26(A)NEC 110.26(C)NEC 110.26(D)NEC 110.26(E)NEC 112.5NEC 120NEC 130.5NEC 130.5(F)NEC 130.5(H)NEC 130.7NEC 200NEC 200.6NEC 210NEC 210.4NEC 210.4(B)NEC 210.5NEC 210.8NEC 210.8(A)NEC 210.8(B)NEC 210.9NEC 210.12NEC 210.19NEC 210.19(A)NEC 210.20NEC 210.21(B)NEC 215NEC 215.2NEC 215.2(A)NEC 215.3NEC 215.10NEC 215.12NEC 220NEC 220.12NEC 220.14NEC 220.42NEC 220.43NEC 220.52NEC 220.53NEC 220.54NEC 220.55NEC 220.56NEC 220.60NEC 220.61NEC 220.70NEC 220.82NEC 220.87NEC 230NEC 230.24NEC 230.42NEC 230.67NEC 230.70NEC 230.71NEC 230.85NEC 230.95NEC 230.95(C)NEC 240NEC 240.4NEC 240.4(B)NEC 240.4(D)NEC 240.6NEC 240.13NEC 240.15NEC 240.15(B)NEC 240.21NEC 240.21(B)NEC 240.21(B)(1)NEC 240.21(B)(2)NEC 240.21(B)(3)NEC 240.21(B)(4)NEC 240.21(B)(5)NEC 240.21(C)NEC 240.21(C)(2)NEC 240.21(C)(6)NEC 240.24NEC 240.67NEC 240.86NEC 240.86(C)NEC 240.87NEC 242NEC 250NEC 250.4NEC 250.4(A)(1)NEC 250.4(A)(5)NEC 250.6NEC 250.12NEC 250.24NEC 250.24(A)(5)NEC 250.24(B)NEC 250.28NEC 250.30NEC 250.30(A)NEC 250.34NEC 250.50NEC 250.52NEC 250.52(A)(1)NEC 250.52(A)(3)NEC 250.52(A)(4)NEC 250.53NEC 250.53(A)(2)NEC 250.53(C)NEC 250.53(F)NEC 250.66NEC 250.66(B)NEC 250.66(C)NEC 250.68
Field guides that apply NEC
Electrical
ElectricalAEGCP field guideElectricalATS commissioning field guideElectricalAluminum branch wiringElectricalArc energy reduction methodsElectricalArc flash study and labelsElectricalAutomatic gate operator field guideElectricalAvailable fault current studyElectricalBattery energy storage (BESS)ElectricalBuck-boost transformer guideElectricalBusway installation field guideElectricalCable fault locating field guideElectricalCable pull planning and tension cardElectricalCable reel receiving and remainder logElectricalCable tray field guideElectricalCommercial lighting designElectricalConcrete-encased duct bank field guideElectricalConductor ampacity derating, NECElectricalConductor color code and phase IDElectricalConductor types and insulationElectricalConduit bending fundamentalsElectricalConduit bodies and fittingsElectricalConduit fill, NEC Chapter 9ElectricalDC fast charging station designElectricalDevice wiring: receptacles and switchesElectricalDisconnect switch types and requirementsElectricalDistribution equipment guideElectricalDry vs liquid transformer guideElectricalDry-type transformer guideElectricalEGC sizing (NEC 250.122)ElectricalEV feeder sizing walkthroughElectricalEVSE install and commissioningElectricalElectric sign installationElectricalElectrical troubleshooting and multimeter testingElectricalEmergency and egress lightingElectricalEmergency and standby power systemsElectricalFeeder and branch circuit sizingElectricalFeeder tap rules, NEC 240.21ElectricalFire alarm install and testElectricalGFCI and AFCI protectionElectricalGFPE field guideElectricalGenerator grounding and bondingElectricalGenerator interlock and backfeed safetyElectricalGenerator load bank testingElectricalGenerator parallelingElectricalGround ring electrode field guideElectricalGrounding and bonding field guideElectricalGrounding system testing field guideElectricalGrounding vs bonding explainedElectricalHarmonics and power qualityElectricalHazardous classified locationsElectricalInfrared thermography field guideElectricalIsolated ground receptaclesElectricalKnob and tube wiringElectricalLED lighting retrofitElectricalLighting controls and dimmingElectricalLoad calculation, NEC 220ElectricalLow-voltage and Class 2 cablingElectricalMCC commissioningElectricalMotor circuit sizing, NEC 430ElectricalMotor nameplate readingElectricalMotor protection and overload relaysElectricalMotor starting methodsElectricalMultiwire branch circuitsElectricalNEC box fill, 314.16ElectricalNEMA enclosure ratingsElectricalOne-line diagram field guideElectricalOvercurrent protection guideElectricalPV rapid shutdown (NEC 690.12)ElectricalPV system wiring (NEC 690)ElectricalPanelboard installationElectricalParallel conductors, NECElectricalPoE voltage drop and heatElectricalPool and spa bonding field guideElectricalPower factor correctionElectricalPull box sizing, 314.28ElectricalReceptacle types and NEMA configsElectricalSelective coordination field guideElectricalService and panel upgradeElectricalService entrance and metering installElectricalSolar PV O&M field guideElectricalSplices and terminationsElectricalStandby generator installElectricalSubmetering and energy monitoringElectricalSurge protection (SPD) field guideElectricalTemporary power field guideElectricalTermination torque QA field guideElectricalUL 508A control panel and SCCRElectricalUfer ground field guideElectricalVFD install and commissioningElectricalVoltage drop field guideElectricalWireway and gutter field guideElectricalWiring methods and conduit typesElectricalWorking clearance (110.26)
Datacenter
DatacenterBESS commissioning punch listDatacenterBMS and DDC controls commissioningDatacenterBattery room ventilation and hydrogen safetyDatacenterCable tray fill and copper takeoffDatacenterCabling pathways and firestopDatacenterCoordination study field guideDatacenterData center battery and storage typesDatacenterData center buildout phasesDatacenterData center cabinet and rack typesDatacenterData center fire and life safetyDatacenterData center generator sizingDatacenterData center grounding and SRGDatacenterData center on-site generationDatacenterData center power commissioningDatacenterData center power distribution chainDatacenterData center rack PDU typesDatacenterEPMS and power meteringDatacenterEPO testing field guideDatacenterEdge and micro data center deploymentDatacenterFire pump acceptance testDatacenterGenerator acceptance and turnoverDatacenterGenerator paralleling switchgearDatacenterGround resistance testingDatacenterMV cable termination and testingDatacenterModular data center deploymentDatacenterPDU and RPP commissioningDatacenterPower capping and oversubscriptionDatacenterPower density and capacity planningDatacenterRack DC power distribution (HVDC)DatacenterRack readiness field guideDatacenterRack-and-stack deployment field guideDatacenterRaised access floor installationDatacenterRaised floor vs slab designDatacenterSPD installation field guideDatacenterStranded capacity and power utilizationDatacenterUPS and STS commissioning hold pointsDatacenterUPS battery maintenance and testingDatacenterWhite space and gray space field guide