3000 Raceway Wire Fill Capacity for Power*
Wire Size
THHN/THWN		 O.D. Number of Conductors (40% Fill)
inches [mm] 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)
14 AWG 0.111 [2.8] 152 70 40 28
12 AWG 0.130 [3.8] 111 51 29 21
10 AWG 0.164 [4.2] 70 32 18 13
8 AWG 0.216 [5.5] 40 18 10 7
6 AWG 0.254 [6.5] 29 13 7 5

3000 Raceway Wire Fill Capacity for Communications
  O.D. (Approx. Dia)  
  Cable wire Size inches [mm] 40%* Fill
UNSHIELDED
TWISTED PAIR		 4-pair, 24 AWG, Cat 3
4-pair, 24 AWG, Cat 5e
4-pair, 24 AWG, Cat 6
4-pair, 24 AWG, Cat 6a
25-pair, 24 AWG		 0.190
0.210
0.250
0.354
0.410		 [4.8]
[5.3]
[6.3]
[9.0]
[10.4]		 52
42
30
15
11
COAXIAL RG6/U 0.270 [6.9] 25
FIBER ZipCord
Round 4 Strand Fiber
Round 6 Strand Fiber		 0.118 x 0.236
0.187
0.256		 [3 x 6]
[4.8]
[6.5]		 53
53
28


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