North America applicable cable

NORTH AMERICAApplicable cable

7THHW (90℃ Dry)

  • Reference standardNFPA70 2023Edition
  • LocationDry location

  • Current carrying capacities※1

    (Ambient temperature other than 30℃) =
  • 1Current carrying capacities applied by size
    x
  • 2Temperature correction factor

※1 This calculation method applies only temperature correction factor. The adjustment factor may differ according to operating conditions. Please refer to NFPA70・NFPA79.

1Current carrying capacities(A) applied by size.(at30 deg.,Ambient temperature,Free air)

Size（AWG） 1c
14 35
12 40
10 55
8 80
6 105
4 140
2 190
1 220
2/0 300
3/0 350
4/0 405
250 MCM 455
350 MCM 570
400 MCM 615
500 MCM 700

2Temperature correction factor

Ambient temperature(℃) Correction factor
10 or less 1.15
11 - 15 1.12
16 - 20 1.08
21 - 25 1.04
26 - 30 1.00
31 - 35 0.96
36 - 40 0.91
41 - 45 0.87
46 - 50 0.82
51 - 55 0.76
56 - 60 0.71
61 - 65 0.65
66 - 70 0.58
71 - 75 0.50
76 - 80 0.41
81 - 85 0.29
NORTH AMERICA APPICABLE CABLE
TOP Technical Info North America applicable cable THHW (90℃ Dry)

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