4000 Raceway Wire Fill Capacity for Power*
    Number of Conductors (40% Fill)
Wire Size
THHN/THWN		 O.D. Without
Devices		 With Duplex/
Rect. Devices
1.59in.² (1025mm)		 With Surge/
GFCI Devices
2.30in.² (1485mm)		 Large Single
Receptacles
3.00in.² (1935mm)
inches [mm] Undiv. Divided Undiv. Divided Undiv. Divided Undiv. Divided
14 AWG 0.111 [2.8] 296 127 165 78 107 49 49 20
12 AWG 0.130 [3.3] 216 93 120 57 78 36 36 15
10 AWG 0.164 [4.2] 136 58 76 36 49 22 22 9
8 AWG 0.216 [5.5] 78 33 43 20 28 13 13 5
6 AWG 0.254 [6.5] 56 24 31 15 20 9 9 3
4 AWG 0.324 [8.2] 34 15 0 0 0 0 0 0
3 AWG 0.352 [8.9] 29 12 0 0 0 0 0 0
2 AWG 0.384 [9.8] 24 10 0 0 0 0 0 0

4000 Raceway Wire Fill Capacity for Communications
  O.D. (Approx. Dia) Divided Undivided
  Cable Wire Size inches [mm] 20%*
Fill		 40%**
Fill		 20%*
Fill		 40%**
Fill
UNSHIELDED
TWISTED PAIR		 4-pair, 24 AWG, Cat 3
4-pair, 24 AWG, Cat 5e
4-pair, 24 AWG, Cat 6		 0.190
0.210
0.250		 [4.8]
[5.3]
[6.3]		 24
20
14		 49
40
28		 50
41
29		 101
83
58
TELEPHONE 2-pair, 24 AWG
3-pair, 24 AWG
4-pair, 24 AWG
25-pair, 24 AWG		 0.140
0.150
0.190
0.410		 [3.6]
[3.8]
[4.8]
[10.4]		 45
39
24
5		 90
79
49
10		 93
81
50
10		 187
163
101
21
COAXIAL RG58/U
RG59/U
RG62/U
RG6/U		 0.195
0.242
0.242
0.270		 [5.0]
[6.1]
[6.1]
[6.9]		 23
15
15
12		 46
30
30
24		 48
31
31
25		 96
62
62
50
TWINAXIAL 100 Ohm 0.330 [8.4] 8 16 16 33
SHIELDED
TWISTED PAIR		 Type 1
Type 2
Type 3		 0.390
0.465
0.245		 [9.9]
[11.8]
[6.2]		 5
4
14		 11
8
29		 12
8
30		 24
16
61
FIBER Mini ZipCord
ZipCord
Round 4 Strand Fiber
Round 6 Strand Fiber		 0.079 x 0.157
0.118 x 0.236
0.187
0.256		 [2 x 4]
[3 x 6]
[4.8]
[6.5]		 56
25
25
13		 112
50
51
27		 116
51
52
27		 232
103
104
55

* 20% cable fill is calculated to approximate reduction in cable capacity due to connectors mounted with raceway and fittings that may restrict cross sectional area.

** 40% cable fill is the maximum designed cable fill based on a proposed revision to TIA/EIA 569-A.