Chapter 9 Tables

Table 1 Percent of Cross Section of Conduit and Tubing for Conductors and Cables

image

Number of Conductors

and/or Cables Cross-Sectional Area (%)

image

1 53

2 31

Over 2 40

Informational Note No. 1: Table 1 is based on common condi‐ tions of proper cabling and alignment of conductors where the length of the pull and the number of bends are within reasona‐ ble limits. It should be recognized that, for certain conditions, a larger size conduit or a lesser conduit fill should be considered.

Informational Note No. 2: When pulling three conductors or cables into a raceway, if the ratio of the raceway (inside diame‐ ter) to the conductor or cable (outside diameter) is between 2.8 and 3.2, jamming can occur. While jamming can occur when pulling four or more conductors or cables into a raceway, the probability is very low.

Notes to Tables

  1. See Informative Annex C for the maximum number of conductors and fixture wires, all of the same size (total cross-sectional area including insulation) permitted in trade sizes of the applicable conduit or tubing.
  2. Table 1 applies only to complete conduit or tubing systems and is not intended to apply to sections of conduit or tubing used to protect exposed wiring from physical damage.
  3. Equipment grounding or bonding conductors, where installed, shall be included when calculating conduit or tubing fill. The actual dimensions of the equipment grounding or bonding conductor (insulated or bare) shall be used in the calculation.
  4. Where conduit or tubing nipples having a maximum length not to exceed 600 mm (24 in.) are installed between boxes, cabinets, and similar enclosures, the nipples shall be permitted to be filled to 60 percent of
    Table 2 Radius of Conduit and Tubing Bendstheir total cross-sectional area, and 310.15(B)(3)(a) adjustment factors need not apply to this condition.
  5. For conductors not included in Chapter 9, such as multi‐ conductor cables and optical fiber cables, the actual dimensions shall be used.
  6. For combinations of conductors of different sizes, use actual dimensions or Table 5 and Table 5A for dimen‐ sions of conductors and Table 4 for the applicable conduit or tubing dimensions.
  7. When calculating the maximum number of conductors or cables permitted in a conduit or tubing, all of the same size (total cross-sectional area including insula‐ tion), the next higher whole number shall be used to determine the maximum number of conductors permit‐ ted when the calculation results in a decimal greater than or equal to 0.8. When calculating the size for conduit or tubing permitted for a single conductor, one conductor shall be permitted when the calculation results in a decimal greater than or equal to 0.8.
  8. Where bare conductors are permitted by other sections of this Code, the dimensions for bare conductors in Table 8 shall be permitted.
  9. A multiconductor cable, optical fiber cable, or flexible cord of two or more conductors shall be treated as a single conductor for calculating percentage conduit or tubing fill area. For cables that have elliptical cross sections, the cross-sectional area calculation shall be based on using the major diameter of the ellipse as a circle diameter. Assemblies of single insulated conduc‐ tors without an overall covering shall not be considered a cable when determining conduit or tubing fill area. The conduit or tubing fill for the assemblies shall be calculated based upon the individual conductors.
  10. The values for approximate conductor diameter and area shown in Table 5 are based on worst-case scenario and indicate round concentric-lay-stranded conductors. Solid and round concentric-lay-stranded conductor values are grouped together for the purpose of Table 5. Round compact-stranded conductor values are shown in Table 5A. If the actual values of the conductor diameter and area are known, they shall be permitted to be used.
image

Conduit or Tubing Size One Shot and Full Shoe Benders Other Bends

Metric DesignatorTrade Sizemmin.mmin.
161∕2101.64101.64
213∕4114.341∕21275
271146.0553∕4152.46
3511∕4184.1571∕4203.28
4111∕2209.5581∕425410
532241.391∕2304.812
6321∕2266.7101∕238115
783330.213457.218
9131∕238115533.421
1034406.416609.624
1295609.62476230
155676230914.436

Table 4 Dimensions and Percent Area of Conduit and Tubing (Areas of Conduit or Tubing for the Combinations of Wires Permitted in Table 1, Chapter 9)

image

Article 358 — Electrical Metallic Tubing (EMT)


Metric

Trade

Over 2 Wires40%

60%

1 Wire53%

2 Wires31%
Nominal Internal Diameter
Total Area 100%
DesignatorSizemm2in.2mm2in.2mm2in.2mm2in.2mmin.mm2in.2
161∕2780.1221180.1821040.161610.09415.80.6221960.304
213∕41370.2132060.3201820.2831060.16520.90.8243430.533
2712220.3463330.5192950.4581720.26826.61.0495560.864
3511∕43870.5985810.8975130.7933000.46435.11.3809681.496
4111∕25260.8147881.2216961.0794070.63140.91.61013142.036
5328661.34212992.01311471.7786711.04052.52.06721653.356
6321∕215132.34322703.51520053.10511731.81669.42.73137835.858
78322803.53834215.30730224.68817672.74285.23.35657018.846
9131∕229804.61844716.92739496.11923103.57997.43.834745111.545
103438085.90157128.85250467.81929514.573110.14.334952114.753

Article 362 — Electrical Nonmetallic Tubing (ENT)


Metric

Trade

Over 2 Wires40%

60%

1 Wire53%

2 Wires31%
Nominal Internal Diameter
Total Area 100%
DesignatorSizemm2in.2mm2in.2mm2in.2mm2in.2mmin.mm2in.2
161∕2730.1141100.171970.151570.08815.30.6021840.285
213∕41310.2031970.3051740.2691020.15720.40.8043280.508
2712150.3333220.4992840.4411660.25826.11.0295370.832
3511∕43750.5815620.8724970.7702910.45034.51.369371.453
4111∕25120.7947691.1916791.0523970.61640.41.5912811.986
5328491.31612741.97511251.7446581.020522.04721233.291
6321∕2
783
9131∕2

Article 348 — Flexible Metal Conduit (FMC)


Metric

Trade

Over 2 Wires40%

60%

1 Wire53%

2 Wires31%
Nominal Internal Diameter
Total Area 100%
DesignatorSizemm2in.2mm2in.2mm2in.2mm2in.2mmin.mm2in.2
123∕8300.046440.069390.061230.0369.70.384740.116
161∕2810.1271220.1901080.168630.09816.10.6352040.317
213∕41370.2132060.3201820.2831060.16520.90.8243430.533
2712110.3273160.4902790.4331630.25325.91.0205270.817
3511∕43300.5114950.7664370.6772560.39632.41.2758241.277
4111∕24800.7437201.1156360.9853720.57639.11.53812011.858
5328431.30712641.96111171.7326531.01351.82.04021073.269
6321∕212671.96319002.94516782.6029821.52263.52.50031674.909
78318242.82727364.24124173.74614142.19176.23.00045607.069
9131∕224833.84837245.77332905.09919242.98388.93.50062079.621
103432435.02748647.54042976.66025133.896101.64.000810712.566

Article 342 — Intermediate Metal Conduit (IMC)


Metric

Trade

Over 2 Wires40%

60%

1 Wire53%

2 Wires31%
Nominal Internal Diameter
Total Area 100%
DesignatorSizemm2in.2mm2in.2mm2in.2mm2in.2mmin.mm2in.2
123∕8
161∕2890.1371330.2051170.181690.10616.80.6602220.342
213∕41510.2352260.3522000.3111170.18221.90.8643770.586(continues)

Article 342 — Intermediate Metal Conduit (IMC)


Metric

Trade

Over 2 Wires40%

60%

1 Wire53%

2 Wires31%
Nominal Internal Diameter
Total Area 100%
DesignatorSizemm2in.2mm2in.2mm2in.2mm2in.2mmin.mm2in.2
2712480.3843720.5753290.5081920.29728.11.1056200.959
3511∕44250.6596380.9885640.8733300.51036.81.44810641.647
4111∕25730.8908591.3357591.1794440.69042.71.68314322.225
5329371.45214052.17812411.9247261.12554.62.15023413.630
6321∕213232.05419853.08117532.72210261.59264.92.55733085.135
78320463.16930694.75327114.19915862.45680.73.17651157.922
9131∕227294.23440936.35136165.61021153.28193.23.671682210.584
103434905.45252358.17946247.22427054.226105.44.166872513.631

Article 356 — Liquidtight Flexible Nonmetallic Conduit (LFNC-A*)


Metric

Trade

Over 2 Wires40%

60%

1 Wire53%

2 Wires31%
Nominal Internal Diameter
Total Area 100%
DesignatorSizemm2in.2mm2in.2mm2in.2mm2in.2mmin.mm2in.2
123∕8500.077750.115660.102390.06012.60.4951250.192
161∕2800.1251210.1871070.165620.09716.00.6302010.312
213∕41390.2142080.3211840.2831070.16621.00.8253460.535
2712210.3423310.5132920.4531710.26526.51.0435520.854
3511∕43870.6015810.9015130.7963000.46635.11.3839681.502
4111∕25200.8077811.2116901.0704030.62640.71.60313012.018
5328631.33712942.00611431.7726691.03652.42.06321573.343

*Corresponds to 356.2(1).

Article 356 — Liquidtight Flexible Nonmetallic Conduit (LFNC-B*)


Metric

Trade

Over 2 Wires40%

60%

1 Wire53%

2 Wires31%
Nominal Internal Diameter
Total Area 100%
DesignatorSizemm2in.2mm2in.2mm2in.2mm2in.2mmin.mm2in.2
123∕8490.077740.115650.102380.05912.50.4941230.192
161∕2810.1251220.1881080.166630.09716.10.6322040.314
213∕41400.2162100.3251850.2871080.16821.10.8303500.541
2712260.3493380.5242990.4621750.27026.81.0545640.873
3511∕43940.6115910.9175220.8103050.47435.41.3959841.528
4111∕25100.7927651.1886761.0503950.61440.31.58812761.981
5328361.29812551.94811081.7206481.00651.62.03320913.246

*Corresponds to 356.2(2).

image

Article 356 — Liquidtight Flexible Nonmetallic Conduit (LFNC-C*)

Nominal Internal

DesignatorSizemm2in.2mm2in.2mm2in.2mm2in.2mmin.mm2in.2
123∕847.70.07471.50.11163.20.09836.90.05712.30.485119.190.185
161∕277.90.121116.90.181103.20.16060.40.09415.70.620194.7780.302
213∕4134.60.209201.90.313178.40.276104.30.16220.70.815336.5680.522
271215.00.333322.50.500284.90.442166.60.25826.21.030537.5660.833
3511∕4380.40.590570.60.884504.10.781294.80.45734.81.370951.0391.474
4111∕2509.20.789763.81.184674.71.046394.60.61240.31.5851272.9631.973
532847.61.3141271.41.9711123.11.741656.91.01851.92.0452119.0633.285

Metric

Trade

Over 2 Wires 40% 60% 1 Wire 53% 2 Wires 31%

Diameter Total Area 100%

*Corresponds to 356.2(3).

Article 350 — Liquidtight Flexible Metal Conduit (LFMC)


Metric

Trade

Over 2 Wires40%

60%

1 Wire53%

2 Wires31%
Nominal Internal Diameter
Total Area 100%
DesignatorSizemm2in.2mm2in.2mm2in.2mm2in.2mmin.mm2in.2
123∕8490.077740.115650.102380.05912.50.4941230.192
161∕2810.1251220.1881080.166630.09716.10.6322040.314
213∕41400.2162100.3251850.2871080.16821.10.8303500.541
2712260.3493380.5242990.4621750.27026.81.0545640.873
3511∕43940.6115910.9175220.8103050.47435.41.3959841.528
4111∕25100.7927651.1886761.0503950.61440.31.58812761.981
5328361.29812551.94811081.7206481.00651.62.03320913.246
6321∕212591.95318882.92916682.5879761.51363.32.49331474.881
78319312.99028964.48525593.96214972.31778.43.08548277.475
9131∕225113.89337665.83933275.15819463.01789.43.52062779.731
103432755.07749127.61543396.72725383.935102.14.020818712.692
1295
1556

Article 344 — Rigid Metal Conduit (RMC)


Metric

Trade

Over 2 Wires40%

60%

1 Wire53%

2 Wires31%
Nominal Internal Diameter
Total Area 100%
DesignatorSizemm2in.2mm2in.2mm2in.2mm2in.2mmin.mm2in.2
123∕8
161∕2810.1251220.1881080.166630.09716.10.6322040.314
213∕41410.2202120.3291870.2911090.17021.20.8363530.549
2712290.3553440.5323030.4701770.27527.01.0635730.887
3511∕43940.6105910.9165220.8093050.47335.41.3949841.526
4111∕25330.8298001.2437071.0984130.64241.21.62413332.071
5328791.36313192.04511651.8066811.05652.92.08321983.408
6321∕212551.94618822.91916632.5799721.50863.22.48931374.866
78319363.00029044.49925653.97415002.32578.53.09048407.499
9131∕225844.00438776.00634245.30520033.10390.73.570646110.010
103433265.15349907.72944086.82825783.994102.94.050831612.882
129552208.085783012.127691610.71340456.266128.95.0731305020.212
1556752811.6631129217.495997515.45458349.039154.86.0931882129.158

Article 352 — Rigid PVC Conduit (PVC), Schedule 80


Metric

Trade

Over 2 Wires40%

60%

1 Wire53%

2 Wires31%
Nominal Internal Diameter
Total Area 100%
DesignatorSizemm2in.2mm2in.2mm2in.2mm2in.2mmin.mm2in.2
123∕8
161∕2560.087850.130750.115440.06713.40.5261410.217
213∕41050.1641580.2461390.217820.12718.30.7222630.409
2711780.2752670.4132360.3651380.21323.80.9364450.688
3511∕43200.4954800.7424240.6562480.38331.91.2557991.237
4111∕24420.6846631.0275850.9073420.53037.51.47611041.711
5327421.15011131.7259831.5235750.89148.61.91318552.874
6321∕210641.64715962.47114102.1838251.27758.22.29026604.119
78316602.57724913.86522003.41412871.99772.72.86441516.442
9131∕222433.47533655.21329724.60517382.69384.53.32656088.688
103429074.50343616.75538525.96722533.49096.23.786726811.258
129546077.142691110.71361059.46335715.535121.14.7681151817.855
1556660510.239990815.359875213.56751197.935145.05.7091651325.598

Articles 352 and 353 — Rigid PVC Conduit (PVC), Schedule 40, and HDPE Conduit (HDPE)


Metric

Trade

Over 2 Wires40%

60%

1 Wire53%

2 Wires31%
Nominal Internal Diameter
Total Area 100%
DesignatorSizemm2in.2mm2in.2mm2in.2mm2in.2mmin.mm2in.2
123∕8
161∕2740.1141100.171970.151570.08815.30.6021840.285
213∕41310.2031960.3051730.2691010.15720.40.8043270.508
2712140.3333210.4992840.4411660.25826.11.0295350.832
3511∕43740.5815610.8724950.7702900.45034.51.3609351.453
4111∕25130.7947691.1916791.0523970.61640.41.59012821.986
5328491.31612741.97511261.7446581.02052.02.04721243.291
6321∕212121.87818172.81716052.4889391.45562.12.44530294.695
78318772.90728164.36124873.85214552.25377.33.04246937.268
9131∕225113.89537665.84233275.16119463.01889.43.52162779.737
103432375.02248557.53242886.65425083.892101.53.998809112.554
129550997.904764911.856675610.47339526.126127.45.0161274819.761
1556737311.4271106017.140977015.14157148.856153.26.0311843328.567

Article 352 — Type A, Rigid PVC Conduit (PVC)


Metric

Trade

Over 2 Wires40%

60%

1 Wire53%

2 Wires31%
Nominal Internal Diameter
Total Area 100%
DesignatorSizemm2in.2mm2in.2mm2in.2mm2in.2mmin.mm2in.2
161∕21000.1541490.2311320.204770.11917.80.7002490.385
213∕41680.2602510.3902220.3451300.20223.10.9104190.650
2712790.4344180.6513700.5752160.33629.81.1756971.084
3511∕44560.7076841.0606040.9373530.54838.11.50011401.767
4111∕26000.9299001.3947951.2314650.72043.71.72015002.324
5329401.45914102.18812451.9337281.13154.72.15523503.647
6321∕214062.18121093.27218632.89010901.69066.92.63535155.453
78321123.27831694.91627994.34316372.54082.03.23052818.194
9131∕227584.27841376.41636555.66821383.31593.73.690689610.694
103435435.48953158.23446957.27327464.254106.24.180885813.723
1295
1556

Article 352 — Type EB, Rigid PVC Conduit (PVC)


Metric

Trade

Over 2 Wires40%

60%

1 Wire53%

2 Wires31%
Nominal Internal Diameter
Total Area 100%
DesignatorSizemm2in.2mm2in.2mm2in.2mm2in.2mmin.mm2in.2
161∕2
213∕4
271
3511∕4
4111∕2
5329991.55014992.32513242.0537741.20156.42.22124983.874
6321∕2
78322483.48433735.22629794.61617432.70084.63.33056218.709
9131∕229324.54643976.81938846.02322723.52396.63.804732911.365
103437265.77955898.66949377.65728874.479108.94.289931414.448
129557268.878858813.317758611.76344376.881135.05.3161431422.195
1556813312.6121220018.9181077616.71163039.774160.96.3362033331.530

Table 5 Dimensions of Insulated Conductors and Fixture Wires

image
image
image
image

Type

Size (AWG or kcmil)

Approximate Area Approximate Diameter mm2 in.2 mm in.

Type: FFH-2, RFH-1, RFH-2, RFHH-2, RHH*, RHW* , RHW-2*, RHH, RHW, RHW-2, SF-1, SF-2, SFF-1, SFF-2, TF, TFF, THHW, THW, THW-2, TW, XF, XFF

RFH-2, FFH-2, RFHH-218169.35511.100.01450.01723.4543.7590.1360.148
RHH, RHW, RHW-2141218.9022.770.02930.03534.9025.3850.1930.212
1086432128.1953.8767.1686.0098.13112.9171.60.04370.08350.10410.13330.15210.17500.26605.9948.2809.24610.4611.1811.9914.780.2360.3260.3640.4120.4400.4720.582
1/02/03/04/0196.1226.1262.7306.70.30390.35050.40720.475415.8016.9718.2919.760.6220.6680.7200.778
250300350400500600405.9457.3507.7556.5650.5782.90.62910.70880.78700.86261.00821.213522.7324.1325.4326.6228.7831.570.8950.9501.0011.0481.1331.243
7007508009001000874.9920.8965.0105711431.35611.42721.49571.63771.771933.3834.2435.0536.6838.151.3141.3481.3801.4441.502
125015001750200015151738195921752.34792.69383.03573.371943.9247.0449.9452.631.7291.8521.9662.072
SF-2, SFF-21816147.4198.96811.100.01150.01390.01723.0733.3783.7590.1210.1330.148
SF-1, SFF-1184.1940.00652.3110.091
RFH-1,TF, TFF, XF, XFF185.1610.00882.6920.106
TF, TFF, XF, XFF167.0320.01092.9970.118
TW, XF, XFF, THHW, THW, THW-2148.9680.01393.3780.133
TW, THHW, THW, THW-21210811.6815.6828.190.01810.02430.04373.8614.4705.9940.1520.1760.236
RHH*, RHW*, RHW-2*1413.480.02094.1400.163
RHH*, RHW*, RHW-2*, XF, XFF1216.770.02604.6230.182

Type: RHH*, RHW*, RHW-2*, THHN, THHW, THW, THW-2, TFN, TFFN, THWN, THWN-2, XF, XFF

RHH,* RHW,* RHW-2,* XF, XFF1021.480.03335.2320.206

(continues)

image

Table 5 Continued

image
image
RHH*, RHW*, RHW-2*835.870.05566.7560.266
TW, THW, THHW, THW-2,646.840.07267.7220.304
RHH*, RHW*, RHW-2*462.770.09738.9410.352
373.160.11349.6520.380
286.000.133310.460.412
1122.60.190112.500.492
1/0143.40.222313.510.532
2/0169.30.262414.680.578
3/0201.10.311716.000.630
4/0239.90.371817.480.688
250296.50.459619.430.765
300340.70.528120.830.820
350384.40.595822.120.871
400427.00.661923.320.918
500509.70.790125.481.003
600627.70.972928.271.113
700710.31.101030.071.184
750751.71.165230.941.218
800791.71.227231.751.250
900874.91.356133.381.314
1000953.81.478434.851.372
125012001.860239.091.539
150014002.169542.211.662
175015982.477345.111.776
200017952.781847.801.882
TFN, TFFN18163.5484.6450.00550.00722.1342.4380.0840.096
THHN, THWN, THWN-2146.2580.00972.8190.111
128.5810.01333.3020.130
1013.610.02114.1660.164
823.610.03665.4860.216
632.710.05076.4520.254
453.160.08248.2300.324
362.770.09738.9410.352
274.710.11589.7540.384
1100.80.156211.330.446
1/0119.70.185512.340.486
2/0143.40.222313.510.532
3/0172.80.267914.830.584
4/0208.80.323716.310.642
250256.10.397018.060.711
300297.30.460819.460.766

Type

Size (AWG or kcmil)

Approximate Area Approximate Diameter mm2 in.2 mm in.

Type: FEP, FEPB, PAF, PAFF, PF, PFA, PFAH, PFF, PGF, PGFF, PTF, PTFF, TFE, THHN, THWN, THWN-2, Z, ZF, ZFF, ZHF

THHN, THWN, THWN-2350338.20.524220.750.817
400378.30.586321.950.864
500456.30.707324.100.949
600559.70.867626.701.051
700637.90.988728.501.122
750677.21.049629.361.156
800715.21.108530.181.188
900794.31.231131.801.252
1000869.51.347833.271.310

(continues)

image

Table 5 Continued

image
image
PF, PGFF, PGF, PFF, PTF, PAF, PTFF, PAFF18163.7424.8390.00580.00752.1842.4890.0860.098
PF, PGFF, PGF, PFF, PTF, PAF, PTFF, PAFF, TFE, FEP, PFA, FEPB, PFAH146.4520.01002.8700.113
TFE, FEP, PFA, FEPB, PFAH128.8390.01373.3530.132
1012.320.01913.9620.156
821.480.03335.2320.206
630.190.04686.1980.244
443.230.06707.4170.292
351.870.08048.1280.320
262.770.09738.9410.352
TFE, PFAH, PFA190.260.139910.720.422
TFE, PFA, PFAH, Z1/0108.10.167611.730.462
2/0130.80.202712.900.508
3/0158.90.246314.220.560
4/0193.50.300015.700.618
ZF, ZFF, ZHF18162.9033.9350.00450.00611.9302.2350.0760.088
Z, ZF, ZFF, ZHF145.3550.00832.6160.103
Z127.5480.01173.0990.122
1012.320.01913.9620.156
819.480.03024.9780.196
627.740.04305.9440.234
440.320.06257.1630.282
355.160.08558.3820.330
266.390.10299.1950.362
181.870.126910.210.402

Type

Size (AWG or kcmil)

Approximate Area Approximate Diameter mm2 in.2 mm in.

Type: KF-1, KF-2, KFF-1, KFF-2, XHH, XHHW, XHHW-2, ZW

XHHW, ZW, XHHW-2, XHH148.9680.01393.3780.133
1211.680.01813.8610.152
1015.680.02434.4700.176
828.190.04375.9940.236
638.060.05906.9600.274
452.520.08148.1790.322
362.060.09628.8900.350
273.940.11469.7030.382

(continues)

image

Table 5 Continued

image
image
XHHW, XHHW-2, XHH198.970.153411.230.442
1/0117.70.182512.240.482
2/0141.30.219013.410.528
3/0170.50.264214.730.58
4/0206.30.319716.210.638
250251.90.390417.910.705
300292.60.453619.300.76
350333.30.516620.600.811
400373.00.578221.790.858
500450.60.698423.950.943
600561.90.870926.751.053
700640.20.992328.551.124
750679.51.053229.411.158
800717.51.112230.231.190
900796.81.235131.851.254
1000872.21.351933.321.312
125011081.718037.571.479
150013002.015640.691.602
175014922.312743.591.716
200016822.607346.281.822
KF-2, KFF-2182.0000.0031.5750.062
162.8390.00431.880.074
144.1290.00642.2860.090
126.0000.00922.7430.108
108.9680.01393.3780.133
KF-1, KFF-1181.6770.00261.4480.057
162.3870.00371.7530.069
143.5480.00552.1340.084
125.3550.00832.6160.103
108.1940.01273.2260.127

Type

Size (AWG or kcmil)

Approximate Area Approximate Diameter mm2 in.2 mm in.

*Types RHH, RHW, and RHW-2 without outer covering.

Table 5A Compact Copper and Aluminum Building Wire Nominal Dimensions* and Areas

image

Bare

SizeApproximateApproximateApproximateApproximateApproximateApproximateApproximateApproximateSize
(AWGDiameterDiameterAreaDiameterAreaDiameterAreaDiameterArea(AWG
or kcmil)
mm in.

mm in.

mm2 in.2

mm in.

mm 2 in.2

mm in.

mm2 in.2

mm in.

mm2 in.2
or kcmil)

Conductor Types RHH**, RHW**, or USE Types THW and THHW Type THHN Type XHHW


8

3.404

0.134

6.604

0.260

34.25

0.0531

6.477

0.255

32.90

0.0510





5.690

0.224

25.42

0.0394

8
64.2930.1697.4930.29544.100.06837.3660.29042.580.06606.0960.24029.160.04526.6040.26034.190.05306
45.4100.2138.5090.33556.840.08818.5090.33556.840.08817.7470.30547.100.07307.7470.30547.100.07304
26.8070.2689.9060.39077.030.11949.9060.39077.030.11949.1440.36065.610.10179.1440.36065.610.10172
17.5950.29911.810.465109.50.169811.810.465109.50.169810.540.41587.230.135210.540.41587.230.13521
1/08.5340.33612.700.500126.60.196312.700.500126.60.196311.430.450102.60.159011.430.450102.60.15901/0
2/09.5500.37613.720.540147.80.229013.840.545150.50.233212.570.495124.10.192412.450.490121.60.18852/0
3/010.740.42314.990.590176.30.273314.990.590176.30.273313.720.540147.70.229013.720.540147.70.22903/0
4/012.070.47516.260.640207.60.321716.380.645210.80.326715.110.595179.40.278014.990.590176.30.27334/0
25013.210.52018.160.715259.00.401518.420.725266.30.412817.020.670227.40.352516.760.660220.70.3421250
30014.480.57019.430.765296.50.459619.690.775304.30.471718.290.720262.60.407118.160.715259.00.4015300
35015.650.61620.570.810332.30.515320.830.820340.70.528119.560.770300.40.465619.300.760292.60.4536350
40016.740.65921.720.855370.50.574121.970.865379.10.587620.700.815336.50.521620.320.800324.30.5026400
50018.690.73623.620.930438.20.679323.880.940447.70.693922.480.885396.80.615122.350.880392.40.6082500
60020.650.81326.291.035542.80.841326.671.050558.60.865925.020.985491.60.762024.890.980486.60.7542600
70022.280.87727.941.100613.10.950328.191.110624.30.967626.671.050558.60.865926.671.050558.60.8659700
75023.060.90828.831.135652.81.011829.211.150670.11.038627.311.075585.50.907627.691.090602.00.9331750
90025.370.99931.501.240779.31.207631.091.224759.11.176630.331.194722.51.119629.691.169692.31.0733900
100026.921.06032.641.285836.61.296832.641.285836.61.296831.881.255798.11.237031.241.230766.61.18821000

*Dimensions are from industry sources.

**Types RHH and RHW without outer coverings.

Table 8 Conductor Properties

image

Size

Conductors Direct-Current Resistance at 75°C (167°F) Stranding Overall Copper

image
image

Area Diameter Diameter Area Uncoated Coated Aluminum

(AWG                                                                                                                                                                                                                                                                   

or Circular

ohm/

ohm/

ohm/

ohm/

ohm/

ohm/

kcmil)mm2milsQuantitymmin.mmin.mm2in.2kmkFTkmkFTkmkFT
180.823162011.020.0400.8230.00125.57.7726.58.0842.012.8
180.823162070.390.0151.160.0461.060.00226.17.9527.78.4542.813.1
161.31258011.290.0511.310.00216.04.8916.75.0826.48.05
161.31258070.490.0191.460.0581.680.00316.44.9917.35.2926.98.21
142.08411011.630.0642.080.00310.13.0710.43.1916.65.06
142.08411070.620.0241.850.0732.680.00410.33.1410.73.2616.95.17
123.31653012.050.0813.310.0056.341.936.572.0110.453.18
123.31653070.780.0302.320.0924.250.0066.501.986.732.0510.693.25
105.2611038012.5880.1025.260.0083.9841.214.1481.266.5612.00
105.2611038070.980.0382.950.1166.760.0114.0701.244.2261.296.6792.04
88.3671651013.2640.1288.370.0132.5060.7642.5790.7864.1251.26
88.3671651071.230.0493.710.14610.760.0172.5510.7782.6530.8094.2041.28
613.302624071.560.0614.670.18417.090.0271.6080.4911.6710.5102.6520.808
421.154174071.960.0775.890.23227.190.0421.0100.3081.0530.3211.6660.508
326.675262072.200.0876.600.26034.280.0530.8020.2450.8330.2541.3200.403
233.626636072.470.0977.420.29243.230.0670.6340.1940.6610.2011.0450.319
142.4183690191.690.0668.430.33255.800.0870.5050.1540.5240.1600.8290.253
1/053.49105600191.890.0749.450.37270.410.1090.3990.1220.4150.1270.6600.201
2/067.43133100192.130.08410.620.41888.740.1370.31700.09670.3290.1010.5230.159
3/085.01167800192.390.09411.940.470111.90.1730.25120.07660.26100.07970.4130.126
4/0107.2211600192.680.10613.410.528141.10.2190.19960.06080.20500.06260.3280.100
250127372.090.08214.610.5751680.2600.16870.05150.17530.05350.27780.0847
300152372.290.09016.000.6302010.3120.14090.04290.14630.04460.23180.0707
350177372.470.09717.300.6812350.3640.12050.03670.12520.03820.19840.0605
400203372.640.10418.490.7282680.4160.10530.03210.10840.03310.17370.0529
500253372.950.11620.650.8133360.5190.08450.02580.08690.02650.13910.0424
600304612.520.09922.680.8934040.6260.07040.02140.07320.02230.11590.0353
700355612.720.10724.490.9644710.7300.06030.01840.06220.01890.09940.0303
750380612.820.11125.350.9985050.7820.05630.01710.05790.01760.09270.0282
800405612.910.11426.161.0305380.8340.05280.01610.05440.01660.08680.0265
900456613.090.12227.791.0946060.9400.04700.01430.04810.01470.07700.0235
1000507613.250.12829.261.1526731.0420.04230.01290.04340.01320.06950.0212
1250633912.980.11732.741.2898421.3050.03380.01030.03470.01060.05540.0169
1500760913.260.12835.861.41210111.5660.028140.008580.028140.008830.04640.0141
17508871272.980.11738.761.52611801.8290.024100.007350.024100.007560.03970.0121
200010131273.190.12641.451.63213492.0920.021090.006430.021090.006620.03480.0106

Notes:

  1. These resistance values are valid only for the parameters as given. Using conductors having coated strands, different stranding type, and, especially, other temperatures changes the resistance.
  2. Equation for temperature change: 2 = 1 [1 + α (2 – 75)], where α cu = 0.00323, αAL = 0.00330 at 75°C.
  3. Conductors with compact and compressed stranding have about 9 percent and 3 percent, respectively, smaller bare conductor diameters than those shown. See Table 5A for actual compact cable dimensions.
  4. The IACS conductivities used: bare copper = 100%, aluminum = 61%.
  5. Class B stranding is listed as well as solid for some sizes. Its overall diameter and area are those of its circumscribing circle. Informational Note: The construction information is in accordance with NEMA WC/70-2009 or ANSI/UL 1581-2011.

The resistance is calculated in accordance with National Bureau of Standards Handbook 100, dated 1966, and Handbook 109, dated 1972.

Table 9 Alternating-Current Resistance and Reactance for 600-Volt Cables, 3-Phase, 60 Hz, 75°C (167°F) — Three Single Conductors in Conduit


Size (AWGor kcmil)
Ohms to Neutral per Kilometer Ohms to Neutral per 1000 Feet
Size (AWGor kcmil)

XL (Reactance) for All Wires
Alternating-Current Resistance for Uncoated Copper Wires
Alternating-Current Resistance for Aluminum Wires
Effective at 0.85 PF for Uncoated CopperWiresEffective at 0.85 PF for AluminumWires

PVC,Aluminum Conduits

Steel Conduit

PVCConduit

Aluminum Conduit

Steel Conduit

PVCConduit

Aluminum Conduit

Steel Conduit

PVCConduit

Aluminum Conduit

Steel Conduit

PVCConduit

Aluminum Conduit

Steel Conduit
140.1900.0580.2400.07310.23.110.23.110.23.1——————8.92.78.92.78.92.7——————14
120.1770.0540.2230.0686.62.06.62.06.62.010.53.210.53.210.53.25.61.75.61.75.61.79.22.89.22.89.22.812
100.1640.0500.2070.0633.91.23.91.23.91.26.62.06.62.06.62.03.61.13.61.13.61.15.91.85.91.85.91.810
80.1710.0520.2130.0652.560.782.560.782.560.784.31.34.31.34.31.32.260.692.260.692.300.703.61.13.61.13.61.18
60.1670.0510.2100.0641.610.491.610.491.610.492.660.812.660.812.660.811.440.441.480.451.480.452.330.712.360.722.360.726
40.1570.0480.1970.0601.020.311.020.311.020.311.670.511.670.511.670.510.950.290.950.290.980.301.510.461.510.461.510.464
30.1540.0470.1940.0590.820.250.820.250.820.251.310.401.350.411.310.400.750.230.790.240.790.241.210.371.210.371.210.373
20.1480.0450.1870.0570.620.190.660.200.660.201.050.321.050.321.050.320.620.190.620.190.660.200.980.300.980.300.980.302
10.1510.0460.1870.0570.490.150.520.160.520.160.820.250.850.260.820.250.520.160.520.160.520.160.790.240.790.240.820.251
1/00.1440.0440.1800.0550.390.120.430.130.390.120.660.200.690.210.660.200.430.130.430.130.430.130.620.190.660.200.660.201/0
2/00.1410.0430.1770.0540.330.100.330.100.330.100.520.160.520.160.520.160.360.110.360.110.360.110.520.160.520.160.520.162/0
3/00.1380.0420.1710.0520.2530.0770.2690.0820.2590.0790.430.130.430.130.430.130.2890.0880.3020.0920.3080.0940.430.130.430.130.460.143/0
4/00.1350.0410.1670.0510.2030.0620.2200.0670.2070.0630.330.100.360.110.330.100.2430.0740.2560.0780.2620.0800.360.110.360.110.360.114/0
2500.1350.0410.1710.0520.1710.0520.1870.0570.1770.0540.2790.0850.2950.0900.2820.0860.2170.0660.2300.0700.2400.0730.3080.0940.3220.0980.330.10250
3000.1350.0410.1670.0510.1440.0440.1610.0490.1480.0450.2330.0710.2490.0760.2360.0720.1940.0590.2070.0630.2130.0650.2690.0820.2820.0860.2890.088300
3500.1310.0400.1640.0500.1250.0380.1410.0430.1280.0390.2000.0610.2170.0660.2070.0630.1740.0530.1900.0580.1970.0600.2400.0730.2530.0770.2620.080350
4000.1310.0400.1610.0490.1080.0330.1250.0380.1150.0350.1770.0540.1940.0590.1800.0550.1610.0490.1740.0530.1840.0560.2170.0660.2330.0710.2400.073400
5000.1280.0390.1570.0480.0890.0270.1050.0320.0950.0290.1410.0430.1570.0480.1480.0450.1410.0430.1570.0480.1640.0500.1870.0570.2000.0610.2100.064500
6000.1280.0390.1570.0480.0750.0230.0920.0280.0820.0250.1180.0360.1350.0410.1250.0380.1310.0400.1440.0440.1540.0470.1670.0510.1800.0550.1900.058600
7500.1250.0380.1570.0480.0620.0190.0790.0240.0690.0210.0950.0290.1120.0340.1020.0310.1180.0360.1310.0400.1410.0430.1480.0450.1610.0490.1710.052750
10000.1210.0370.1510.0460.0490.0150.0620.0190.0590.0180.0750.0230.0890.0270.0820.0250.1050.0320.1180.0360.1310.0400.1280.0390.1380.0420.1510.0461000

Notes:

  1. These values are based on the following constants: UL-Type RHH wires with Class B stranding, in cradled configuration. Wire conductivities are 100 percent IACS copper and 61 percent IACS aluminum, and aluminum conduit is 45 percent IACS. Capacitive reactance is ignored, since it is negli‐ gible at these voltages. These resistance values are valid only at 75°C (167°F) and for the parameters as given, but are representative for 600-volt wire types operating at 60 Hz.
  2. Effective Z is defined as cos(θ) + sin(θ), where θ is the power factor angle of the circuit. Multiplying current by effective impedance gives a good

approximation for line-to-neutral voltage drop. Effective impedance values shown in this table are valid only at 0.85 power factor. For another circuit power factor (PF), effective impedance (Ze) can be calculated from R and X L values given in this table as follows: Ze = R × PF + X L sin[arccos(PF)].

Table 10 Conductor Stranding


Conductor Size
Number of Strands
CopperAluminum
AWG or kcmilmm2Class BaClass CClass Ba
24–300.20–0.05b
220.327
200.5210
180.8216
161.326
14–22.1–33.67197c
1–4/042.4–107193719
250–500127–253376137
600–1000304–508619161
1250–1500635–7599112791
1750–2000886–1016127271127

aConductors with a lesser number of strands shall be permitted based on an evaluation for connectability and bending.

bNumber of strands vary.

cAluminum 14 AWG (2.1 mm2) is not available.

With the permission of Underwriters Laboratories, Inc., material is reproduced from UL Standard 486A-B, Wire Connectors, which is copyrighted by Underwriters Laboratories, Inc., Northbrook, Illinois. While use of this material has been authorized, UL shall not be responsible for the manner in which the information is presented, nor for any interpretations thereof. For more information on UL or to purchase standards, please visit our Stand‐ ards website at www.comm-2000.com or call 1-888-853-3503.

Table 11(A) and Table 11(B)

For listing purposes, Table 11(A) and Table 11(B) provide the required power source limitations for Class 2 and Class 3 power sources. Table 11(A) applies for alternating-current sources, and Table 11(B) applies for direct-current sources.

The power for Class 2 and Class 3 circuits shall be either (1) inherently limited, requiring no overcurrent protection, or (2) not inherently limited, requiring a combination of power source and overcurrent protection. Power sources designed for interconnection shall be listed for the purpose.

As part of the listing, the Class 2 or Class 3 power source shall be durably marked where plainly visible to indicate the

class of supply and its electrical rating. A Class 2 power source not suitable for wet location use shall be so marked.

Exception: Limited power circuits used by listed information technology equipment.

Overcurrent devices, where required, shall be located at the point where the conductor to be protected receives its supply and shall not be interchangeable with devices of higher ratings. The overcurrent device shall be permitted as an integral part of the power source.

Table 11(A) Class 2 and Class 3 Alternating-Current Power Source Limitations


Power Source
Inherently Limited Power Source (Overcurrent Protection Not Required)Not Inherently Limited Power Source (Overcurrent Protection Required)
Class 2Class 3Class 2Class 3
Source voltage max (volts) (see Note 1)0 through 20*Over 20 and through 30*Over 30 andthrough 150Over 30 andthrough 1000 through 20*Over 20 and through 30*Over 30 and through 100Over 100 andthrough 150
Power limitationsVA max (volt-amperes) (see Note 1)250 (seeNote 3)250250N.A.
Current limitations max (amperes) (see Note 1)8.08.00.005150/max1000/max1000/max1000/max1.0
Maximum overcurrent protection (amperes)5.0100/max100/max1.0
Power source maximum nameplate ratingVA (volt- amperes)5.0 × max1000.005 × max1005.0 × max100100100
Current (amperes)5.0100/max0.005100/max5.0100/max100/max100/max

Note: Notes for this table can be found following Table 11(B).

*Voltage ranges shown are for sinusoidal ac in indoor locations or where wet contact is not likely to occur. For nonsinusoidal or wet contact conditions, see Note 2.

Table 11(B) Class 2 and Class 3 Direct-Current Power Source Limitations


Power Source
Inherently Limited Power Source (Overcurrent Protection Not Required)Not Inherently Limited Power Source (Overcurrent Protection Required)
Class 2Class 3Class 2Class 3
Source voltageV max (volts) (see Note 1)0 through 20*Over 20 and through 30*Over 30 and through 60*Over 60 and through 150Over 60 and through 1000 through 20*Over 20 and through 60*Over 60 and through 100Over 100 and through 150
Power limitationsVA max (volt-amperes) (see Note 1)250 (seeNote 3)250250N.A.
Current limitations max (amperes) (see Note 1)8.08.0150/max0.005150/max1000/max1000/max1000/max1.0
Maximum overcurrent protection (amperes)5.0100/max100/max1.0
Power source maximum nameplate ratingVA (volt- amperes)5.0 × max1001000.005× max1005.0 × max100100100
Current (amperes)5.0100/max100/max0.005100/max5.0100/max100/max100/max

*Voltage ranges shown are for continuous dc in indoor locations or where wet contact is not likely to occur. For interrupted dc or wet contact conditions, see Note 4.

Notes for Table 11(A) and Table 11(B)

  1. V max, I max, and VA max are determined with the current-limiting impedance in the circuit (not bypassed) as follows:V max: Maximum output voltage regardless of load with rated input applied.I max: Maximum output current under any noncapacitive load, including short circuit, and with overcurrent protection bypassed if used. Where a transformer limits the output current, I max limits apply after 1 minute of operation. Where a current-limiting impedance, listed for the purpose, or as part of a listed product, is used in combination with a nonpower-limited transformer or a stored energy source, e.g., storage battery, to limit the output current, I maxlimits apply after 5 seconds.VA max: Maximum volt-ampere output after 1 minute of operation regardless of load and overcurrent protection bypassed if used.
  2. For nonsinusoidal ac, max shall not be greater than 42.4 volts peak. Where wet contact (immersion not included) is likely to occur, Class 3 wiring methods shall be used or max shall not be greater than 15 volts for sinusoidal ac and 21.2 volts peak for nonsinusoidal ac.
  3. If the power source is a transformer, VA max is 350 or less when max is 15 or less.
  4. For dc interrupted at a rate of 10 to 200 Hz, max shall not be greater than 24.8 volts peak. Where wet contact (immersion not included) is likely to occur, Class 3 wiring methods shall be used, or max shall not be greater than 30 volts for continuous dc; 12.4 volts peak for dc that is interrupted at a rate of 10 to 200 Hz.
    Table 12(A) and Table 12(B)For listing purposes, Table 12(A) and Table 12(B) provide the required power source limitations for power-limited fire alarm sources. Table 12(A) applies for alternating-current sour‐ ces, and Table 12(B) applies for direct-current sources. The power for power-limited fire alarm circuits shall be either (1) inherently limited, requiring no overcurrent protection, or (2) not inherently limited, requiring the power to be limited by a combination of power source and overcurrent protection.Table 12(A) PLFA Alternating-Current Power Source LimitationsAs part of the listing, the PLFA power source shall be durably marked where plainly visible to indicate that it is a power- limited fire alarm power source. The overcurrent device, where required, shall be located at the point where the conductor to be protected receives its supply and shall not be interchangea‐ ble with devices of higher ratings. The overcurrent device shall be permitted as an integral part of the power source.

    Power SourceInherently Limited Power Source (Overcurrent Protection Not Required)Not Inherently Limited Power Source (Overcurrent Protection Required)Circuit voltage max(volts) (see Note 1)0 through 20Over 20 andthrough 30Over 30 andthrough 1000 through 20Over 20 andthrough 100Over 100 andthrough 150Power limitationsVA max(volt-amperes) (see Note 1)———250 (see Note 2)250N.A.Current limitationsI max (amperes) (see Note 1)8.08.0150/max1000/max1000/max1.0Maximum overcurrent protection (amperes)———5.0100/max1.0Power source maximum nameplate ratingsVA (volt-amperes)5.0 × max1001005.0 × max100100Current (amperes)5.0100/max100/max5.0100/max100/maxNote: Notes for this table can be found following Table 12(B).
    Table 12(B) PLFA Direct-Current Power Source Limitations

    Power SourceInherently Limited Power Source (Overcurrent Protection Not Required)Not Inherently Limited Power Source (Overcurrent Protection Required)Circuit voltage max (volts) (see Note 1)0 through 20Over 20 andthrough 30Over 30 andthrough 1000 through 20Over 20 andthrough 100Over 100 andthrough 150Power limitations VA max (volt-amperes) (see Note 1)———250 (see Note 2)250N.A.Current limitations max (amperes) (see Note 1)8.08.0150/max1000/max1000/max1.0Maximum overcurrent protection (amperes)———5.0100/max1.0Power source maximum nameplate ratingsVA (volt- amperes)5.0 × max1001005.0 × max100100Current (amperes)5.0100/max100/max5.0100/max100/maxNotes for Table 12(A) and Table 12(B)
    1. V max, I max, and VA max are determined as follows:V max: Maximum output voltage regardless of load with rated input applied.I max: Maximum output current under any noncapacitive load, including short circuit, and with overcurrent protection bypassed if used. Where a transformer limits the output current, I max limits apply after 1 minute of operation. Where a current-limiting impedance, listed for the purpose, is used in combination with a nonpower-limited transformer or a stored energy source, e.g., storage battery, to limit the output current, I max limits apply after 5 seconds.VA max: Maximum volt-ampere output after 1 minute of operation regardless of load and overcurrent protection bypassed if used. Current limiting impedance shall not be bypassed when determining I max and VA max.
    2. If the power source is a transformer, VA max is 350 or less when max is 15 or less.
Sidebar