APPENDIX

NEC Wire Gauge Chart

Allowable Ampacities of Insulated Conductors Rated 0 – 2000 Volts, 60° to 90°C (140° to 194°F), not more than three conductors in Raceway or Cable or Earth (Directly Buried), Based on Ambient Temperature of 30°C (86°F)

Size

 

 

 

Temperature Rating of Conductor

 

 

Size

AWG kcmll

60 C° (140°F)

75°C (167°F)

 

90°C (194°F)

 

60°C (140°F)

75°C (167°F)

90°C (194°F)

AWG kcmll

 

Types: TW*, UF*

Types: FEPW*,

 

Types: TA, TBS,

 

Types: TW*, UF*

Types: RH*,

Types: TA, TBS,

 

 

 

RH*, RHW*,

SA, SIS, FEP*,

 

 

RHW*, THHW*,

SA, SIS, THHN*,

 

 

 

THHW*, THW*,

 

FEPB*, MI, RHH*,

 

THW*, THWN*,

THHW*, THW-2,

 

 

 

THWN*, XHHW*,

 

RHW-2, THHN*,

 

 

XHHW*, USE*

THWN-2, RHH*,

 

 

 

USE*, ZW*

THHW*, THW-2,

 

 

 

RHW-2, USE-2,

 

 

 

 

 

THWN-2, USE-2,

 

 

 

XHH, XHHW*,

 

 

 

 

 

XHH, XHHW*,

 

 

 

XHHW-2, ZW-2

 

 

 

 

XHHW-2, ZW-2

 

 

 

 

 

 

 

Copper

 

 

 

Aluminum or Copper-Clad Aluminum

 

18

-

-

 

14

 

-

-

-

-

16

-

-

 

18

 

-

-

-

-

14

20*

20*

 

25*

 

-

-

-

-

12

25*

25*

 

30*

 

20*

20*

25*

12

10

30

35*

 

40*

 

25

30*

35*

10

8

40

50

 

55

 

30

40

45

8

6

55

65

 

75

 

40

50

60

6

4

70

85

 

95

 

55

65

75

4

3

85

100

 

110

 

65

75

85

3

2

95

115

 

130

 

75

90

100

2

1

110

130

 

150

 

85

100

115

1

1/0

125

150

 

170

 

100

120

135

1/0

2/0

145

175

 

195

 

115

135

150

2/0

3/0

165

200

 

225

 

130

155

175

3/0

4/0

195

230

 

260

 

150

180

205

4/0

250

215

255

 

290

 

170

205

230

250

300

240

285

 

320

 

190

230

255

300

350

260

310

 

350

 

210

250

280

350

400

280

335

 

280

 

225

270

305

400

500

320

380

 

430

 

260

310

350

500

600

355

420

 

475

 

285

340

385

600

700

385

460

 

520

 

310

275

420

700

750

400

475

 

535

 

320

385

435

750

800

410

490

 

555

 

330

395

450

800

900

435

520

 

585

 

355

425

480

900

1000

455

545

 

615

 

375

445

500

1000

1250

495

590

 

665

 

405

485

545

1250

1500

520

625

 

705

 

435

520

585

1500

1750

545

650

 

735

 

455

545

615

1750

2000

560

665

 

750

 

470

560

630

2000

 

 

 

 

CORRECTION FACTORS

 

 

 

Ambient Temp.

For ambient temperatures other than 30° (86° F), multiply the allowable ampacities shown above by the appropriate factor shown

Ambient Temp. °C

°C

 

 

 

 

below.

 

 

 

21-25

1.08

1.05

 

1.04

 

1.08

1.05

1.04

70-77

26-30

1.00

1.00

 

1.00

 

1.00

1.00

1.00

78-86

31-35

.91

.94

 

.96

 

.91

.94

.96

87-95

36-40

.82

.88

 

.91

 

.82

.88

.91

96-104

 

 

 

 

 

 

 

 

 

 

41-45

.71

.82

 

.87

 

.71

.82

.87

105-113

46-50

.58

.75

 

.82

 

.58

.75

.82

114-122

 

 

 

 

 

 

 

 

 

 

51-55

.41

.67

 

.76

 

.41

.67

.76

123-131

 

 

 

 

 

 

 

 

 

 

56-60

-

.58

 

.71

 

-

.58

.71

132-140

 

 

 

 

 

 

 

 

 

 

61-70

-

.33

 

.58

 

-

.33

.58

141-158

 

 

 

 

 

 

 

 

 

 

71-80

-

-

 

.41

 

-

-

.41

159-176

 

 

 

 

 

 

 

 

 

 

*Unless otherwise specifically permitted elsewhere in this Code the overcurrent protection for conductor types marked with an asterisk shall not exceed 15 amperes for No.14, 20 amperes for No.12, and 30 amperes for No.10 copper; or 15 amperes for No.12 and 25 amperes No. 10 aluminum and copper-clad aluminum after any correction factors for ambient temperature and number of conductors have been applied.

Reprinted with permission from NFPA 70-1996, the National Electrical Code ®, Copyright 1995, National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the complete and official position of the National Fire Protection Association on the referenced subject which is represented only by the standard in its entirety.

32

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Image 32
Liebert VM12000, VM18000 user manual Appendix, NEC Wire Gauge Chart

VM18000, VM12000 specifications

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