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Switchboards are designed with busbars for fuses or circuit breakers that are used for protecting and supplying feeders and branch circuits. Panelboards are designed with a permanently installed main circuit breaker or single set of fuses for disconnecting the number of circuit breakers or fuseholders installed to protect and supply feeders or branch circuits.
SUPPORT AND ARRANGEMENT OF BUSBARS AND CONDUCTORS
408.3
Busbars shall be held firmly in place in the enclosure and shall be arranged in such a way to allow adequate space for conductors to be terminated. Busbars shall be sized with enough capacity to handle the normal currents in amps of the electrical system. In addition, they shall carry safely any type of short-circuit or ground-fault condition.
CONDUCTORS AND BUSBARS ON A SWITCHBOARD OR PANELBOARD
408.3(A)
Conductors and busbars on a switchboard, panelboard, or control board shall be so located as to be free from physical damage. Service sections of such boards shall be separated from the other electrical components. These components shall be properly secured in an approved manner.
Note, conductors entering a certain section shall terminate in such section, except where it is not practical for control, interconnecting conductors, or other conditions of use.
OVERHEATING AND INDUCTIVE HEATING
408.3(B)
The arrangement of busbars and conductors shall be such as to avoid overheating due to inductive effects. The inductive effect of each conductor is neutralized when grouping all conductors together. To accomplish the minimizing of heating effects, the ungrounded (phase) conductors, grounded (neutral) conductors, and equipment grounding conductors, where used, shall be in the same enclosure, raceway, cable, cord, etc. (See Figure 7-1)
Chapters
Chapter 1：OVERHEATING AND INDUCTIVE HEATING - 408.3(B) (4 minutes and 31 seconds)
Chapter 2：USED AS SERVICE EQUIPMENT - 408.3(C) (8 minutes and 19 seconds)
Chapter 3：PHASE ARRANGEMENT - 408.3(E) AND (F) (3 minutes and 14 seconds)
Chapter 4：PHASE ARRANGEMENT - 408.3(E) AND (F) (3 minutes and 39 seconds)
Chapter 5：5 (6 minutes and 20 seconds)
Chapter 6：HIGH LEG IDENTIFICATION - 408.3(F)(1) (3 minutes and 42 seconds)
Chapter 7：MINIMUM WIRE-BENDING SPACE - 408.3(G) (3 minutes and 43 seconds)
Chapter 8：MINIMUM WIRE-BENDING SPACE - 408.3(G) (2 minutes and 12 seconds)
Chapter 9：CLEARANCE FOR CONDUCTOR ENTERING BUS ENCLOSURES - 408.5 (3 minutes and 26 seconds)
Chapter 10：DEDICATED EQUIPMENT SPACE - 408.18(B) AND 110.26(E)(1)(a) (5 minutes and 30 seconds)
Chapter 11：PANELBOARDS AND SWITCHBOARDS - ARTICLE 408, PART II (3 minutes and 39 seconds)
Chapter 12：SWITCHBOARD CLEARANCES - 408.18(A) AND (B) (1 minutes and 50 seconds)
Chapter 13：OVERCURRENT PROTECTION - 408.36 (1 minutes and 45 seconds)
Chapter 14：OVERCURRENT PROTECTION - 408.36 (1 minutes and 53 seconds)
Chapter 15：OVERCURRENT PROTECTION - 408.36 (3 minutes and 49 seconds)
Chapter 16：SPLIT-BUS PANELBOARD (3 minutes and 8 seconds)
Chapter 17：SNAP SWITCHES RATED AT 30 AMPS OR LESS - 408.36(A) (4 minutes and 38 seconds)
Chapter 18：SUPPLIED THROUGH A TRANSFORMER - 408.36(B) (4 minutes and 29 seconds)
Chapter 19：GROUNDING OF PANELBOARDS - 408.40 (5 minutes and 37 seconds)
Chapter 20：GROUNDING OF PANELBOARDS - 408.40 (2 minutes and 44 seconds)
Chapter 21：ISOLATED EQUIPMENT GROUNDING CONDUCTOR - 408.40, Ex (3 minutes and 50 seconds)
Chapter 22：(a) RUNNING CIRCUITS TO COMPENSATE FOR HARMONIC CURRENTS (2 minutes and 30 seconds)
Chapter 23：(b) RUNNING CIRCUITS TO COMPENSATE FOR HARMONIC CURRENTS (3 minutes and 8 seconds)
Chapter 24：AMBIENT TEMPERATURE - 310.14(A)(3), IN 1(1) (4 minutes and 41 seconds)
Chapter 25：WHEN TO APPLY CORRECTION FACTORS - 310.14(A)(2), Ex (6 minutes and 1 seconds)
Chapter 26：DISSIPATION INTO AMBIENT MEDIUM - 310.14(A)(3), IN 1(3) (3 minutes and 16 seconds)
Chapter 27：MATCHING TEMPERATURE MARKINGS - 110.14(C)(1)(a) AND (C)(1)(b) (7 minutes and 29 seconds)
Chapter 28：WHEN TO APPLY ADJUSTMENT FACTORS - 310.15(C)(1) TO TABLES 0 – 2000 VOLTS (3 minutes and 40 seconds)
Chapter 29：EQUIPMENT GROUNDING CONDUCTORS - ARTICLE 100 AND 310.6(B) (3 minutes and 34 seconds)
Chapter 30：OVERCURRENT - ARTICLE 100, 240.3, AND 240.4 (3 minutes and 25 seconds)
Chapter 31：WHEN IS A NEUTRAL CURRENT-CARRYING - 310.15(E)(3) (3 minutes and 38 seconds)
Chapter 32：UNGROUNDED CONDUCTORS - 310.6(C) (4 minutes and 24 seconds)
Chapter 33：UNGROUNDED CONDUCTORS - 310.6(C) (2 minutes and 22 seconds)
Chapter 34：TERMINAL RATINGS - 110.14(C)(1)(a) AND (C)(1)(b) (5 minutes and 57 seconds)
Chapter 35：LONG- AND SHORT-TIME RATINGS OF CONDUCTORS - 310.14(A)(3) AND TABLE 310.16 (7 minutes and 3 seconds)
Chapter 36：THREE OR MORE CURRENT-CARRYING CONDUCTORS - 310.15(C)(1) TO AMPACITY TABLES 0 – 2000 VOLTS (3 minutes and 14 seconds)
Chapter 37：DERATING FOR AMBIENT TEMPERATURE CORRECTION FACTORS - TABLES 310.15(B)(1) AND (B)(2) (7 minutes and 8 seconds)
Chapter 38：(a) APPLYING BOTH DERATING FACTORS TABLE 310.15(C)(1) AND TABLES 310.15(B)(1) AND (B)(2) (6 minutes and 58 seconds)
Chapter 39：(b) APPLYING BOTH DERATING FACTORS TABLE 310.15(C)(1) AND TABLES 310.15(B)(1) AND (B)(2) (5 minutes and 9 seconds)
Chapter 40：(c) APPLYING BOTH DERATING FACTORS TABLE 310.15(C)(1) AND TABLES 310.15(B)(1) AND (B)(2) (5 minutes and 53 seconds)
Chapter 41：APPLYING 50 PERCENT LOAD DIVERSITY FACTOR - TABLE B.310.14(B)(2)(11) (3 minutes and 53 seconds)
Chapter 42：BRANCH-CIRCUIT ELEMENTS - 422.10(A) AND (B), AND 422.11(A) THRU (G) (4 minutes and 7 seconds)
Chapter 43：(a) INDIVIDUAL CIRCUITS - 210.19(A)(1)(a), 210.1 AND 210.20(A) (2 minutes and 50 seconds)
Chapter 44：(b) INDIVIDUAL CIRCUITS - 210.19(A)(1)(a), 210.1 AND 210.20(A) (7 minutes and 59 seconds)
Chapter 45：CONDUCTORS IN PARALLEL - 310.10(G) (9 minutes and 56 seconds)
Chapter 46：CONDUCTOR CONSTRUCTIONS AND APPLICATIONS - 310.4 (7 minutes and 24 seconds)
Chapter 47：TYPICAL AMBIENT DESIGN TEMPERATURE - 1971 NEC (6 minutes and 44 seconds)
Chapter 48：DETERMINING CONDUCTOR AMPACITIES IN CABLES - TABLES 311.60(C)(77) THRU 311.60(C)(86) (7 minutes and 59 seconds)
Chapter 49：DETERMINING CONDUCTOR AMPACITIES IN DUCT BANKS - TABLES 311.60(C)(77) THRU 311.60(C)(86) (2 minutes and 31 seconds)
Chapter 50：DERATING DUE TO OBSTRUCTIONS - 311.60(C)(2)(a) TO TABLES 311.60(C)(77) THRU 311.60(C)(86) (5 minutes and 2 seconds)
Chapter 51：DERATING DUE TO OBSTRUCTIONS - 311.60(C)(2)(b) TO TABLES 311.60(C)(77) THRU 311.60(C)(86) (4 minutes and 30 seconds)
Chapter 52：RACEWAYS AND CABLES EXPOSED TO SUNLIGHT ON ROOFTOOPS - 310.15(B)(2) AND Ex (9 minutes and 20 seconds)
Chapter 53：PROTECTION OF EQUIPMENT - 240.3 AND TABLE 240.3 (4 minutes and 1 seconds)
Chapter 54：PROTECTION OF EQUIPMENT PROTECTION OF CONDUCTORS - 240.4 (3 minutes and 7 seconds)
Chapter 55：OVERCURRENT DEVICES RATED 800 AMPS OR LESS - 240.4(B) (6 minutes and 55 seconds)
Chapter 56：OVERCURRENT DEVICES RATED OVER 800 AMPS - 240.4(C) (5 minutes and 21 seconds)
Chapter 57：OTOR-OPERATED APPLIANCE CIRCUIT CONDUCTORS - 240.4(G) AND TABLE 240.4(G) (4 minutes and 12 seconds)
Chapter 58：(a) MOTOR AND MOTOR-CONTROL CIRCUIT CONDUCTORS - 240.4(G) AND TABLE 240.4(G) (10 minutes and 18 seconds)
Chapter 59：(b) MOTOR AND MOTOR-CONTROL CIRCUIT CONDUCTORS - 240.4(G) AND TABLE 240.4(G) (11 minutes and 10 seconds)
Chapter 60：(a) PHASE CONVERTER SUPPLY CONDUCTORS - 240.4(G) AND TABLE 240.4(G) (3 minutes and 15 seconds)
Chapter 61：(b) PHASE CONVERTER SUPPLY CONDUCTORS - 240.4(G) AND TABLE 240.4(G) (3 minutes and 5 seconds)
Chapter 62：AIR-CONDITIONING AND REFRIGERATION EQUIPMENT CIRCUIT CONDUCTORS - 240.4(G) AND TABLE 240.4(G) (6 minutes and 41 seconds)
Chapter 63：(a) TRANSFORMER SECONDARY CONDUCTORS - 240.4(F) (4 minutes and 7 seconds)
Chapter 64：(b) TRANSFORMER SECONDARY CONDUCTORS - 240.4(F) (3 minutes and 18 seconds)
Chapter 65：(a) CAPACITOR CIRCUIT CONDUCTORS - 240.4(G) AND TABLE 240.4(G) (3 minutes and 0 seconds)
Chapter 66：(b) CAPACITOR CIRCUIT CONDUCTORS - 240.4(G) AND TABLE 240.4(G) (4 minutes and 38 seconds)
Chapter 67：ELECTRIC WELDER CIRCUIT CONDUCTORS - 240.4(G) AND TABLE 240.4(G) (3 minutes and 53 seconds)
Chapter 68：REMOTE-CONTROL, SIGNALING, AND POWER-LIMITED CIRCUIT CONDUCTORS - 240.4(G) AND TABLE 240.4(G) (4 minutes and 45 seconds)
Chapter 69：FIRE ALARM CIRCUIT CONDUCTORS - 240.4(G) AND TABLE 240.4(G) (4 minutes and 35 seconds)
Chapter 70：FIXTURE WIRE - 240.5(B)(2) (5 minutes and 15 seconds)
Chapter 71：EXTENSION CORD SETS - 240.5(B)(3) (6 minutes and 6 seconds)
Chapter 72：STANDARD AMPERE RATINGS - 240.6(A) AND TABLE 240.6(A) (5 minutes and 50 seconds)
Chapter 73：ADJUSTABLE TRIP CIRCUIT BREAKERS - 240.6(B) AND (C) (2 minutes and 51 seconds)
Chapter 74：SUPPLEMENTARY OVERCURRENT PROTECTION - 240.10 (3 minutes and 37 seconds)
Chapter 75：ELECTRICAL SYSTEM COORDINATION - 240.12 (2 minutes and 37 seconds)
Chapter 76：USING HANDLE TIES - 240.15(B) (3 minutes and 49 seconds)
Chapter 77：BRANCH-CIRCUIT CONDUCTORS - 240.21(A) (5 minutes and 53 seconds)
Chapter 78：(a) TAPS NOT OVER 10 FT (3 m) LONG - 240.21(B)(1) (4 minutes and 54 seconds)
Chapter 79：(b) TAPS NOT OVER 10 FT (3 m) LONG - 240.21(B)(1) (3 minutes and 14 seconds)
Chapter 80：TAPS NOT OVER 25 FT (7.5 m) LONG - 240.21(B)(2) (2 minutes and 57 seconds)
Chapter 81：(a) TAPS SUPPLYING A TRANSFORMER [PRIMARY PLUS SECONDARY NOT OVER 25 FT LONG]240.21(B)(3) (2 minutes and 32 seconds)
Chapter 82： (b) TAPS SUPPLYING A TRANSFORMER [PRIMARY PLUS SECONDARY NOT OVER 25 FT LONG] - 240.21(B)(3) (3 minutes and 37 seconds)
Chapter 83：(a) TAPS OVER 25 FT (7.5 m) LONG - 240.21(B)(4) (3 minutes and 14 seconds)
Chapter 84：(b) TAPS OVER 25 FT (7.5 m) LONG - 240.21(B)(4) (2 minutes and 14 seconds)
Chapter 85：TRANSFORMER SECONDARY CONDUCTORS NOT OVER 10 FT (3 m) LONG - 240.21(C)(2) (5 minutes and 6 seconds)
Chapter 86：INDUSTRIAL INSTALLATION SECONDARY CONDUCTORS NOT OVER 25 FT (7.5 m) LONG - 240.21(C)(3) (5 minutes and 6 seconds)
Chapter 87：OUTSIDE SECONDARY CONDUCTORS - 240.21(C)(4) (4 minutes and 18 seconds)
Chapter 88：SERVICE CONDUCTORS - 240.21(D) (2 minutes and 2 seconds)
Chapter 89：USWAY TAPS - 240.21(E) (3 minutes and 19 seconds)
Chapter 90：(a) MOTOR CIRCUIT TAPS - 240.21(F) (6 minutes and 34 seconds)
Chapter 91：(b) MOTOR CIRCUIT TAPS - 240.21(F) (3 minutes and 31 seconds)
Chapter 92：CONDUCTORS FROM GENERATOR TERMINALS - 240.21(G) (4 minutes and 33 seconds)
Chapter 93：PROTECTED BY A DIFFERENTIAL RELAY - 240.92(C)(1)(2) (8 minutes and 25 seconds)
Chapter 94：GROUNDED (NEUTRAL) CONDUCTOR - 240.22 (3 minutes and 22 seconds)
Chapter 95：CHANGE IN SIZE OF GROUNDED (NEUTRAL) CONDUCTOR - 240.23 (5 minutes and 20 seconds)
Chapter 96：ACCESSIBILITY OF OVERCURRENT PROTECTION DEVICES - 240.24(A) (3 minutes and 12 seconds)
Chapter 97：ACCESSIBILITY OF OVERCURRENT PROTECTION DEVICES - 240.24(A) (3 minutes and 26 seconds)
Chapter 98：BRANCH-CIRCUIT OVERCURRENT DEVICES - 240.24(B)(2) (1 minutes and 7 seconds)
Chapter 99：SIZING - 210.20(A), 215.3, AND 230.42(A)(1) (4 minutes and 49 seconds)
Chapter 100：(a) SIZING - 210.20(A), 215.3, AND 230.42(A)(1) (2 minutes and 16 seconds)
Chapter 101：(b) SIZING - 210.20(A), 215.3, AND 230.42(A)(1) (2 minutes and 37 seconds)
Chapter 102：DISCONNECTING MEANS FOR FUSES - 240.40 (2 minutes and 3 seconds)
Chapter 103：SIZING - 210.20(A), 215.3, 230.42(A)(1), AND 230.90(A) (5 minutes and 49 seconds)
Chapter 104：MARKING - 240.83 (5 minutes and 36 seconds)
Chapter 105：CLEARING TIME - 230.95(A), 240.13, 210.13, AND 215.10 (5 minutes and 45 seconds)
Chapter 106：GROUND-FAULT PROTECTION FOR PERSONNEL - 590.6 (5 minutes and 51 seconds)
Chapter 107：(a) FEEDERS AND BRANCH CIRCUITS - 240.100(A) THRU (C) AND ARTICLE 100 (6 minutes and 4 seconds)
Chapter 108：(b) OVERCURRENT RELAYS AND CURRENT TRANSFORMERS - 240.100(A)(1) (2 minutes and 56 seconds)
Chapter 109：(c) OVERCURRENT RELAYS AND CURRENT TRANSFORMERS - 240.100(A)(1) (6 minutes and 5 seconds)
Chapter 110：(d) OVERCURRENT RELAYS AND CURRENT TRANSFORMERS - 240.100(A)(1) (4 minutes and 2 seconds)
Chapter 111：(a) ADDITIONAL REQUIREMENTS FOR FEEDERS - 240.101(A) AND (B) (3 minutes and 59 seconds)
Chapter 112：(b) ADDITIONAL REQUIREMENTS FOR FEEDERS - 240.101(A) AND (B) (5 minutes and 16 seconds)
Chapter 113：GROUNDING RECEPTACLES - 406.4(A) (6 minutes and 47 seconds)
Chapter 114：GROUNDING RECEPTACLES - 406.4(A) (4 minutes and 29 seconds)
Chapter 115：NONGROUNDING RECEPTACLES - 406.4(D)(2), (D)(3), AND Ex (2 minutes and 57 seconds)
Chapter 116：REPLACEMENT OF RECEPTACLES - 250.130(C) (6 minutes and 8 seconds)
Chapter 117：NUMBER ON A CIRCUIT - 210.11(A) (4 minutes and 24 seconds)
Chapter 118：NUMBER ON A CIRCUIT - 210.11(A) (5 minutes and 47 seconds)
Chapter 119：WALL RECEPTACLE OUTLETS - 210.52(A)(1) THRU (A)(4) (2 minutes and 51 seconds)
Chapter 120：WALL RECEPTACLE OUTLETS - 210.52(A)(1) THRU (A)(4) (3 minutes and 6 seconds)
Chapter 121：(a) WALL RECEPTACLE OUTLETS - 210.52(A)(1) THRU (A)(4) (2 minutes and 40 seconds)
Chapter 122：(b) WALL RECEPTACLE OUTLETS - 210.52(A)(1) THRU (A)(4) (1 minutes and 56 seconds)
Chapter 123：RECEPTACLE OUTLETS FOR SMALL-APPLIANCE CIRCUITS210.52(B), 210.52(C), 210.11(C)(1), & 220.52(A) (3 minutes and 49 seconds)
Chapter 124：RECEPTACLE OUTLETS FOR SMALL-APPLIANCE CIRCUITS210.52(B), 210.52(C), 210.11(C)(1), & 220.52(A) (2 minutes and 16 seconds)
Chapter 125：WALL COUNTERTOP SPACES - 210.52(C) AND (C)(1) (4 minutes and 51 seconds)
Chapter 126：ISLAND COUNTERTOP SPACES - 210.52(C)(2) (3 minutes and 56 seconds)
Chapter 127：RECEPTACLE OUTLETS IN BATHROOMS - 210.52(D) (3 minutes and 42 seconds)
Chapter 128：RECEPTACLE OUTLETS OUTDOORS - 210.52(E) (1 minutes and 39 seconds)
Chapter 129：LAUNDRY CIRCUIT - 210.52(F) (2 minutes and 34 seconds)
Chapter 130：RECEPTACLES IN BASEMENTS - 210.52(G) (2 minutes and 21 seconds)
Chapter 131：RECEPTACLES IN GARAGES - 210.52(G) (3 minutes and 20 seconds)
Chapter 132：RECEPTACLES IN HALLWAYS - 210.52(H) (1 minutes and 5 seconds)
Chapter 133：FOYERS - 210.52(I) (2 minutes and 0 seconds)
Chapter 134：GFCI PROTECTION OF RECEPTACLES - 210.8(A)(1) THRU (A)(10) (9 minutes and 17 seconds)
Chapter 135：PROTECTION IN BATHROOMS - 210.8(A)(1) (2 minutes and 58 seconds)
Chapter 136：PROTECTION IN GARAGES - 210.8(A)(2) (2 minutes and 29 seconds)
Chapter 137：PROTECTION IN ACCESSORY BUILDINGS - 210.8(A)(2) (2 minutes and 6 seconds)
Chapter 138：PROTECTION OUTDOORS - 210.8(A)(3) (3 minutes and 8 seconds)
Chapter 139：PROTECTION IN BASEMENTS AND CRAWL SPACES - 210.8(A)(4) AND 210.8(A)(5) (2 minutes and 5 seconds)
Chapter 140：PROTECTION OVER COUNTERTOPS - 210.8(A)(6) AND (A)(7) (4 minutes and 33 seconds)
Chapter 141：PROTECTION OVER COUNTERTOPS210.8(A)(6) AND (A)(7) (1 minutes and 44 seconds)
Chapter 142：PROTECTION FOR BOATHOUSES - 210.8(A)(8) AND 210.8(C) (1 minutes and 5 seconds)
Chapter 143：(a) PROTECTION FOR DWELLING UNITS - 210.8(A)(9), (A)(10), AND (A)(11) (2 minutes and 3 seconds)
Chapter 144： (b) PROTECTION FOR DWELLING UNITS - 210.8(A)(9), (A)(10), AND (A)(11) (3 minutes and 40 seconds)
Chapter 145：(a) PROTECTION AROUND SWIMMING POOLS - 680.22(A)(1) THRU (A)(5) (3 minutes and 8 seconds)
Chapter 146：(b) PROTECTION AROUND SWIMMING POOLS - 680.22(A)(1) THRU (A)(5) (1 minutes and 26 seconds)
Chapter 147：PROTECTION AROUND SWIMMING POOLS - 680.22(A)(1) THRU (A)(5) (1 minutes and 19 seconds)
Chapter 148：PROTECTION FOR STORABLE POOLS - 680.32 (3 minutes and 18 seconds)
Chapter 149：PROTECTION FOR SPAS OR HOT TUBS - 680.43(A)(1) AND (A)(2) (3 minutes and 12 seconds)
Chapter 150：PROTECTION FOR HYDROMASSAGE TUBS - 680.71 THRU 680.73 (3 minutes and 29 seconds)
Chapter 151：RECEPTACLES ON CONSTRUCTION SITES - 590.6(A) AND (B) (3 minutes and 47 seconds)
Chapter 152：RECEPTACLES ON CONSTRUCTION SITES - 590.6(A) AND (B) (3 minutes and 38 seconds)
Chapter 153：RECEPTACLES ON CONSTRUCTION SITES - 590.6(A) AND (B) (3 minutes and 18 seconds)
Chapter 154：RECEPTACLES ON CONSTRUCTION SITES - 590.6(A) AND (B) (4 minutes and 10 seconds)
Chapter 155：RECEPTACLES INSTALLED IN BATHROOMS OF COMMERCIAL AND INDUSTRIAL LOCATIONS - 210.8(B)(1) (2 minutes and 38 seconds)
Chapter 156：RECEPTACLES INSTALLED IN KITCHENS OF COMMERCIAL AND INDUSTRIAL BUILDINGS - 210.8(B)(2) (2 minutes and 9 seconds)
Chapter 157：RECEPTACLES INSTALLED ON ROOFTOPS OF COMMERCIAL AND INDUSTRIAL BUILDINGS - 210.8(B)(3) (2 minutes and 54 seconds)
Chapter 158：RECEPTACLES INSTALLED OUTDOORS - 210.8(B)(4) (2 minutes and 45 seconds)
Chapter 159：RECEPTACLE OUTLETS INSTALLED IN INDOOR WET LOCATIONS - 210.8(B)(6) (1 minutes and 43 seconds)
Chapter 160：LOCKER ROOMS WITH SHOWERS - 210.8(B)(7) (2 minutes and 41 seconds)
Chapter 161：GARAGES, SERVICE BAYS, AND SIMILAR AREAS - 210.8(B)(8) (2 minutes and 2 seconds)
Chapter 162：Receptacles in Seating Areas and Other Similar Surfaces - 406.5(H)(1) THRU (H)(4) (2 minutes and 23 seconds)
Chapter 163：RECEPTACLES USED FOR MAINTENANCE ACTIVITIES - 590.6 AND .6(A) (2 minutes and 57 seconds)
Chapter 164：AFCI-PROTECTED OUTLETS - 210.12(A) AND (D) (1 minutes and 53 seconds)
Chapter 165：AFCI-PROTECTED OUTLETS - 210.12(A) AND (D) (2 minutes and 23 seconds)
Chapter 166：Arc-Fault Circuit-Interrupter Protection - 210.12 (4 minutes and 1 seconds)
Chapter 167：Arc-Fault Circuit-Interrupter Protection210.12 (3 minutes and 47 seconds)
Chapter 168：Branch Circuit Extension or Modifications – Dwelling Units - 210.12(D) (2 minutes and 57 seconds)
Chapter 169：GROUNDING LUMINAIRES - 410.42 AND 410.44 (5 minutes and 51 seconds)
Chapter 170：UNGROUNDED LUMINAIRES - 410.44, Ex. 2 (2 minutes and 46 seconds)
Chapter 171：REPLACEMENT LUMINAIRES - 410.44, Ex. 1 (3 minutes and 56 seconds)
Chapter 172： (a) NUMBER ON A CIRCUIT - 210.11(A) (4 minutes and 0 seconds)
Chapter 173：(b) NUMBER ON A CIRCUIT - 210.11(A) (5 minutes and 38 seconds)
Chapter 174：LIGHTING OUTLETS IN DWELLING UNITS - 210.70(A) (3 minutes and 53 seconds)
Chapter 175：LIGHTING OUTLETS IN HABITABLE ROOMS - 210.70(A)(1) (2 minutes and 33 seconds)
Chapter 176：LIGHTING OUTLETS IN BATHROOMS - 210.70(A)(1) (1 minutes and 58 seconds)
Chapter 177：WALL-SWITCHED RECEPTACLE LIGHTING OUTLETS - 210.70(A)(1), Ex. 1 (3 minutes and 10 seconds)
Chapter 178：LIGHTING OUTLETS IN HALLWAYS - 210.70(A)(2)(a) (2 minutes and 19 seconds)
Chapter 179：LIGHTING OUTLETS IN STAIRWAYS - 210.70(A)(2)(1) (2 minutes and 46 seconds)
Chapter 180：LIGHTING OUTLETS IN GARAGES - 210.70(A)(2)(1) AND (A)(2)(2) (1 minutes and 13 seconds)
Chapter 181： LIGHTING OUTLETS AT OUTSIDE DOORS - 210.70(A)(2)(2) (2 minutes and 1 seconds)
Chapter 182：LIGHTING OUTLETS IN UTILITY ROOMS - 210.70(C) (1 minutes and 57 seconds)
Chapter 183：LIGHTING OUTLETS IN BASEMENTS - 210.70(C) (1 minutes and 54 seconds)
Chapter 184：LIGHTING OUTLETS IN ATTICS - 210.70(C) (3 minutes and 32 seconds)
Chapter 185：LIGHTING OUTLETS IN UNDERFLOOR SPACES - 210.70(C) (3 minutes and 27 seconds)
Chapter 186：LIGHTING OUTLETS OVER BATHTUBS - 410.10(D) (2 minutes and 51 seconds)
Chapter 187：LOCATION - 410.16(C)(1) THRU (C)(5) (3 minutes and 4 seconds)
Chapter 188：GUEST ROOMS OR GUEST SUITES IN HOTELS AND MOTELS - 210.70(B) (2 minutes and 27 seconds)
Chapter 189：COMMERCIAL AND INDUSTRIAL ATTICS AND UNDERFLOOR SPACES (ALL OCCUPANCIES) - 210.70(C) (2 minutes and 50 seconds)
Chapter 190：ILLUMINATION FOR ELECTRICAL EQUIPMENT IN COMMERCIAL & INDUSTRIAL LOCATIONS - 110.26(D) (3 minutes and 18 seconds)
Chapter 191：RECESSED LUMINAIRES - 410.115(B) AND Ex.'s 1 AND 2 (2 minutes and 39 seconds)
Chapter 192：DISCHARGE LIGHTING - 410.140(B) (1 minutes and 46 seconds)
Chapter 193：LIGHTING OUTLETS AT SWIMMING POOLS - 680.22(B) (3 minutes and 2 seconds)
Chapter 194：LIGHTING OUTLETS AT SWIMMING POOLS - 680.22(B) (1 minutes and 22 seconds)
Chapter 195：WET-NICHE LUMINARIES - 680.23(B)(1) THRU (B)(8) (3 minutes and 48 seconds)
Chapter 196：WET-NICHE LUMINARIES - 680.23(B)(1) THRU (B)(8) (1 minutes and 22 seconds)
Chapter 197：WET-NICHE LUMINARIES - 680.23(B)(1) THRU (B)(8) (2 minutes and 13 seconds)
Chapter 198：DRY-NICHE LUMINARIES - 680.23(C) (2 minutes and 25 seconds)
Chapter 199：NO-NICHE LUMINAIRES - 680.23(D) (2 minutes and 0 seconds)
Chapter 200：LUMINAIRES OVER SPAS OR HOT TUBS - 680.43(B) (2 minutes and 15 seconds)
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