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Where to Find Wiring Methods in the Code

 

Article 300: Wiring Methods

Article 300 covers wiring methods for all installations unless modified by other articles in the Code.

 

I. General Requirements (300.1 Through 300.23)

Part I covers conductors permitted to be run together and conductors that must be kept separated. It also covers protection of conductors and wiring methods against physical and environmental damage, securing and supporting of conductors, and minimizing the spread of flame and smoke in the event of fire.

 

II. Requirements for Over 600 Volts, Nominal (300.31 Through 300.50)

Part II provides additional rules for high-voltage conductors and underground installations, both direct burial and in raceways.

 

 

 
Additional Wiring Methods
 
Equipment/Location  Article/Part  Section

Agricultural buildings

 547.5

Aircraft hangars 

 

 513.4,  513.7,  513.8

Assembly, places of

 

 518.4

Audio signal processing, amplification, and reproduction equipment

 

 640.9

Carnivals, circuses, fairs, and similar events

525-III

 

Electric vehicle charging system equipment 

625-II

 

Electroplating systems 

 

 669.6

Exposed 

 100

 

Hazardous (classified) locations, Class I, Zone 0, 1, and 2

 

 505.15

Hazardous (classified) locations, Class II

 502.10

Hazardous (classified) locations, Class III 

 503.10

Hazardous (classified) locations, Zone 20, 21, and 22

 

 506.15

Health care facilities

 

 517.12

Intrinsically safe systems

 

 504.20

Manufactured buildings 

 545.4

Manufactured homes 

 550.10

Marinas and boatyards 

 555.13

Mobile homes 

 

 550.10,  550.15

Network-powered broadband communications systems 

830-V

 

Park trailers

 

 552.48

Recreational vehicles (camping trailers, motor homes, park trailers, travel trailers,
     remote control truck campers) and recreational vehicle parks

 

 551.47

Sensitive electronic equipment 

 

 647.4

Service-entrance conductors 

 

 230.43

Solar photovoltaic systems

690-IV

690.31

Theaters

 

 520.5