Chapter 3 Wiring Methods and Materials

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ARTICLE 328 - MEDIUM VOLTAGE CABLE: TYPE MV 328.80 326.80 Ampacity. The ampacity of Type lOS cable shall not exceed the values shown in Table 326.80. Table 326.80 Ampacity of Type IGS Cable 326.120 Marking. The cable shall be marked in accordance with 31O.11(A), 310.11(B)(l), and 310. 11 (D). Size (kcmil) Amperes Size (kcmil) Amperes 250 119 2500 500 168 3000 376 412 750 206 3250 429 1000 238 3500 445 1250 266 3750 461 1500 292 4000 476 1750 315 4250 491 2000 336 4500 505 2250 357 4750 519 III. Construction Specifications 326.104 Conductors. The conductors shall be solid aluminum rods, laid parallel, consisting of one to nineteen 12.7 mm (1/2 in.) diameter rods. The minimum conductor size shall be 250 kcmil, and the maximum size shall be 4750 kcmil. 326.112 Insulation. The insulation shall be dry kraft paper tapes and a pressurized sulfur hexafluoride gas (SF 6 ), both approved for electrical use. The nominal gas pressure shall be 138 kPa gauge (20 pounds per square inch gauge). The thickness of the paper spacer shall be as specified in Table 326.112. Table 326.112 Paper Spacer Thickness Thickness Size (kcmil) mm in. 25D-1000 1.02 0.040 1250-4750 1.52 0.060 326.116 Conduit. The conduit shall be a medium density polyethylene identified as suitable for use with natural gas rated pipe in metric designator 53, 78, or 103 (trade size 2, 3, or 4). The percent fill dimensions for the conduit are shown in Table 326.116. The size of the conduit permitted for each conductor size shall be calculated for a percent fill not to exceed those found in Table 1, Chapter 9. I. General 328.1 Scope. This article covers the use, installation, and construction specifications for medium voltage cable, Type MY. 328.2 Definition. Medium Voltage Cable, Type MV. A single or multiconductor solid dielectric insulated cable rated 2001 volts or higher. II. Installation 328.10 Uses Permitted. Type MY cable shall be permitted for use on power systems rated up to 35,000 volts nominal as follows: (1) In wet or dry locations (2) In raceways (3) :=~i=~~~l~;rs:i=:~~:~~~~~ii;1~!l'1 Exception: (4) Direct buried in accordance with 300.50 (5) In messenger-supported wiring itt~~:~1?1:rt Exception: ... Table 326.116 Conduit Dimensions Conduit Size Metric Designator Actual Outside Diameter Actual Inside Diameter Trade Size mm in. mm in. FPN: The "Uses Permitted" is not an all-inclusive lis!. 328.12 Uses Not Permitted. Type MY cable shall not be use d"'...... ~~I>' ~,il>,.~··nUwlt; ""~J>I'iI"> . . .. .SO 'TW,. tUl. less idemiied . for 53 78 103 2 3 4 60 89 114 2.375 3.500 4.500 49.46 73.30 94.23 1.947 2.886 3.710 328.80 Ampacity. The ampacity of Type MY cable shall be determined in accordance with 310.60. The ampacity of 2008 Edition NATIONAL ELECTRICAL CODE 70-181
328.100 ARTICLE 330 - METAL-CLAD CABLE: TYPE MC Type MV cable installed in cable tray shall be detennined in accordance with 392.13. Ill. Construction Specifications 328.100 Construction. Type MV cables shall have copper, aluminum, or copper-clad aluminum conductors and shall comply with lab~31Ql;1~(
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CHAPTER 3 ARTICLE 300 - WIRING METH
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300.5 ARTICLE 300 - WIRING METHODS
Page 5 and 6: 300.6 ARTICLE 300 - WIRING METHODS
Page 13 and 14: 310.1 ARTICLE 310 - CONDUCTORS FOR
Page 23 and 24: 310.15 ARTICLE 31O-CONDUCTORS FOR G
Page 25 and 26: 310.15 ARTICLE 31O-CONDUCTORS FOR G
Page 33 and 34: 310.60 ARTICLE 310- CONDUCTORS FOR
Page 39 and 40: 312.1 ARTICLE 312 - CABINETS, CUTOU
Page 41 and 42: 312.10 ARTICLE 312 - CABINETS, CUTO
Page 43 and 44: 314.4 ARTICLE 314 - OUTLET, DEVICE,
Page 45 and 46: 314.19 ARTICLE 314- OUTLET. DEVICE,
Page 47 and 48: 314.24 ARTICLE 314 - OUTLET. DEVICE
Page 49 and 50: 314.30 ARTICLE 314-0UTLET, DEVICE.
Page 51 and 52: 320.12 ARTICLE 320 - ARMORED CABLE:
Page 53 and 54: 322.100 ARTICLE 324 - FLAT CONDUCTO
Page 55: 324.60 ARTICLE 326 - INTEGRATED GAS
Page 59 and 60: 332.1 ARTICLE 332-MINERAL-INSULATED
Page 61 and 62: 334.12 ARTICLE 334-NONMETALLIC-SHEA
Page 63 and 64: 336.1 ARTICLE 336 - POWER AND CONTR
Page 65 and 66: 338.24 ARTICLE 340 - UNDERGROUND FE
Page 67 and 68: 342.28 ARTICLE 344-RIGID METAL COND
Page 69 and 70: 344.42 ARTICLE 348 - FLEXIBLE METAL
Page 71 and 72: 348.42 ARTICLE 350 - LIQUIDTIGHT FL
Page 73 and 74: 352.12 ARTICLE 352 - RIGID POLYVINY
Page 75 and 76: 352.60 ARTICLE 353 - HIGH DENSITY P
Page 77 and 78: 354.12 ARTICLE 354-NONMETALLIC UNDE
Page 79 and 80: 355.22 ARTICLE 355 - REINFORCED THE
Page 81 and 82: 356.6 ARTICLE 356 - LIQUIDTIGHT FLE
Page 83 and 84: 358.22 ARTICLE 360 - FLEXIBLE METAL
Page 85 and 86: 362.1 ARTICLE 362 - ELECTRICAL NONM
Page 87 and 88: 366.1 ARTICLE 366 - AUXILIARY GUTTE
Page 89 and 90: 368.1 ARTICLE 368 - BUSWAYS (I) Sui
Page 91 and 92: 368.214 ARTICLE 370 - CABLEBUS IV.
Page 93 and 94: 372.4 ARTICLE 374 - CELLULAR METAL
Page 95 and 96: 376.12 ARTICLE 376-METAL WIREWAYS 3
Page 97 and 98: 378.30 ARTICLE 382 - NONMETALLIC EX
Page 99 and 100: 382.56 ARTICLE 384- STRUT-TIPE CHAN
Page 101 and 102: 384.120 ARTICLE 386-SURFACE METAL R
Page 103 and 104: 390.1 ARTICLE 390 - UNDERFLOOR RACE
Page 105 and 106: 392.4 ARTICLE 392 - CABLE TRAYS the
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392.9 ARTICLE 392 - CABLE TRA YS si
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392.11 ARTICLE 392 - CABLE TRAYS Ta
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394.10 ARTICLE 394 - CONCEALED KNOB
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398.10 ARTICLE 398 - OPEN WIRING ON
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Chapter 3 Wiring Methods and Materials

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