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Wire Ampacities & Conduit Information
 
 
WIRE AMPACITIES & CONDUIT INFORMATION
UTILITY AMPACITIES

Triplex
Service
Drop
600V
ACSR NEUTRAL - MESSENGER
Code -
Word 		Phase
Conductor 		Bare
Neutral 		Allowable
Ampacities (amps)
  Size (AWG) Size (AWG) XLP POLY
Voluta
Periwinkle
Conch
Nertina
Runcina
Zuzara 		6
4
2
1/0
2/0
4/0 		6
4
2
1/0
2/0
4/0 		85
115
150
205
235
315 		70
90
120
160
185
245

Quadruplex
Service
Drop
600V
ACSR NEUTRAL - MESSENGER
Code -
Word 		Phase
Conductor 		Bare
Neutral 		Allowable
Ampacities (amps)
  Size (AWG) Size (AWG) XLP POLY
Hackney
Palomino
Costena
Grullo
Appaloosa 		4
2
1/0
2/0
4/0 		4
2
1/0
2/0
4/0 		100
135
180
205
275 		80
105
140
160
210

Triplex
Secondary
UD
600V
TRIPLEXED WITH YELLOW EXTRUDED STRIPE NEUTRAL
Code -
Word 		Phase
Conductors 		Neutral Allowable
Ampacities (amps)
  Size
(AWG or kcmil)		 Size
(AWG or kcmil)		 Direct
Burial 		In
Ducts
Erskine
Vassar
Stephens
Ramapo
Brenau
Bergen
Converse
Hunter
Sweetbriar
Wesleyan 		6
4
2
2
1/0
1/0
2/0
2/0
4/0
350 		6
4
4
2
2
1/0
1
2/0
2/0
4/0 		95
125
165
165
215
215
245
245
315
415 		70
90
120
120
160
160
180
180
240
320

Quadruplex
Secondary
UD
600V
QUADRUPLEX WITH YELLOW EXTRUDED STRIPE NEUTRAL
Code -
Word 		Phase
Conductor 		Bare
Neutral 		Allowable
Ampacities (amps)
  Size (AWG) Size (AWG) XLP POLY
Voluta
Periwinkle
Conch
Nertina
Runcina
Zuzara 		6
4
2
1/0
2/0
4/0 		6
4
2
1/0
2/0
4/0 		85
115
150
205
235
315 		70
90
120
160
185
245

 

CU BUILDING WIRE AMPACITIES

COPPER
Ampacaties of insulated conductors
rated 0-2000 volts, 60°C - 250°C
single CONDUCTORS IN FREE AIR,
BASED ON AMBIENT TEMPERATURE OF 30°c
Size 75°C 90°C
AWG
or
kcmil		 THWN
XHHW
RHW
USE		 THHN
XHHW
RHH
14
12
10
8
6
 30
35
50
70
95		 35
40
55
80
105
4
3
2
1		 125
145
170
195		 140
165
190
220
0
00
000
0000		 230
265
310
360		 260
300
350
405
250
300
350
400
500		 405
445
505
545
620		 455
505
570
615
700
600
700
750
800
900		 690
755
785
815
870		 780
855
885
920
985
1000
1250
1500
1750
2000		 935
1065
1175
1280
1385		 1055
1200
1325
1445
1560
 
COPPER
Ampacaties of insulated conductors
rated 0-2000 volts, 60°C - 250°C
NOT MORE THAN THREE CONDUCTORS IN
RACEWAY, CABLE OR EARTH (DIRECTLY
BURIED), BASED ON AN AMBIENT
TEMPERATURE OF 30°C
Size 75°C
165°F 		90°C
194°F
AWG
or
kcmil
  		THWN
XHHW
RHW
USE 		THHN
XHHW
RHH
 
14
12
10
8
6
20
25
35
50
65 		25
30
40
55
75
4
3
2
1 		85
100
115
130 		95
110
130
150
0
00
000
0000 		150
175
200
230 		170
195
225
260
250
300
350
400
500 		255
285
310
335
380 		290
320
350
380
430
600
700
750
800
900 		420
460
475
490
520 		475
520
535
555
585
1000
1250
1500
1750
2000		 545
590
625
650
665 		615
665
705
735
750
     
NM-B
CONDUCTOR
Size
(AWG) 		NO. CONDUCTORS
IN CABLE		 ALLOWABLE
AMPACITY
TWO CONDUCTOR
14
12
10
8
6 		2
2
2
2
2 		15
20
30
40
55
THREE CONDUCTOR
14
12
10
8
6
4
2 		3
3
3
3
3
3
3 		15
20
30
40
55
70
95
 
UF-B
CONDUCTOR
Size
(AWG) 		NO. CONDUCTORS
IN CABLE		 ALLOWABLE
AMPACITY
14
12
10
8
6 		2
2
2
2
2 		15
20
30
40
55
14
12
10
8
6		 3
3
3
3
3		 15
20
30
40
55
     
Minimum Size Equipment
Grounding Conductors for
Grounding Raceway
and Equipment
RATING OR SETTING OF
AUTOMATIC OVERCURRENT
DEVICE IN CIRCUIT AHEAD
OF EQUIPMENT, CONDUIT,
ETC., NOT EXCEEDING
(AMPERES)		 SIZE
COPPER
AWG or
kcmil 		ALUMINUM OR
COPPER-CLAD
ALUMINUM
AWG OR kcmil
15
20
30 		14
12
10 		12
10
8
40
60
100 		10
10
8 		8
8
6
200
300
400 		6
4
3 		4
2
1
500
600
800 		2
1
0 		1/0
2/0
3/0
1000
1200
1600 		2/0
3/0
4/0 		4/0
250
350
2000
2500
3000 		250
350
400 		400
600
600
4000
5000
6000 		500
700
800 		800
1200
1200

 

CONDUIT FILL

Maximum Number of Conductors in
Trade Sizes of Conduit or Tubing
CONDUIT SIZE ½ ¾ 1 1¼ 1½ 2 2½ 3 3½ 4 5 6
CONDUCTOR
TYPE		 WIRE
SIZE		                        
THWN



THHN
(14 THRU 2)



XHHW
(4 THRU
500 kcmil)




  		14
12
10
8
6
4
3
2
1
0
00
000
0000
250
300
350
400 		13
10
6
3
1
1
1
1









 24
18
11
5
4
2
1
1
1
1
1
1
1




 39
29
18
9
6
4
3
3
1
1
1
1
1
1
1
1

 69
51
32
16
11
7
6
5
3
3
2
1
1
1
1
1
1

94
70
44
22
15
9
8
7
5
4
3
3
2
1
1
1
1

154
114
73
36
26
16
13
11
8
7
6
5
4
3
3
2
1
164
104
51
37
22
19
16
12
10
8
7
6
4
4
3
3

160
79
57
35
29
25
18
15
13
11
9
7
6
5
5


106
76
47
39
33
25
21
17
14
12
10
8
7
6


136
98
60
51
43
32
27
22
18
15
12
11
9
8



154
94
80
67
50
42
35
29
24
20
17
15
13




137
116
97
72
61
51
42
35
28
24
21
19
  500
600
700
750 		      1
1


 1
1
1
1 		1
1
1
1 		2
1
1
1 		4
3
3
2 		5
4
4
3 		7
5
5
4 		11
9
8
7 		16
13
11
11

 
P.O. Box 5998       Norman, OK   73070-5998       Voice: 405.364.0612        Fax: 405.364.7899        WATS: (800) 256-1364
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