Max. size of Type UF is 4/0 AWG. The allowable values in the Ampacity Table are based on temperature alone and do not take voltage drop into consideration. 10 AWG aluminum after any correction. factors Tor ambient temperature and number of conductors have been applied.

The wire size chart below shows allowable ampacities of insulated conductors rated up to and including 2000 Volts, 60°C through 90°C (140°F through 194°F), not more than three current-carrying conductors in raceway, cable, or earth (directly buried), based on ambient air temperature of 30°C (86°F).

310.12 NEC table discusses copper and aluminum wire sizes for 100 amp to 400 amp services and feeders. This relates to most households (National Electrical Code refers to homes using these terms: one-family dwellings, 2-family dwellings, and multifamily dwellings ).

NFPA 70: NEC - 2023 Notes: 1. Section 310.15(B) shall be referenced for ampacity correction factors where the ambient temperature is other than 30°C (86°F). 2. Section 310.17 shall be referenced for conditions of use. *Section 240.4(D) shall be referenced for conductor overcurrent protection limitations, except as modified elsewhere by the ...

Table 5 Continued Type Size (AWG or kcmil) Approximate Diameter Approximate Area mm in. mm2 in.2 THHN, THWN, THWN-2 14 2.819 0.111 6.258 0.0097 12 3.302 0.130 8.581 0.0133

AWG – American Wire Gauge Chart – Wire Size & Amps Rating Table. American Wire Gauge “AWG” is one of the important and standard tools in the US NEC (National Electrical Codes) used to sizing different cables and wires for multiple applications.

2nd NEC 210.16 table includes aluminum wire (or copper-clad aluminum wire) ampacities from 18 AWG to 2000 kcmil for all 3 temperatures. Here is the 1st chart, followed by the 2nd chart. Table of Contents

These are general references to the National Electrical Code® (NEC) NFPA70® to assist standard 80% rated circuit breaker selection. Proper engineering evaluation is required for each customer application.

The previous table version can be seen here. 1. Section 310.15 (B) shall be referenced for ampacity correction factors where the ambient temperature is other than 30 C (86 F). 2. Section 310.15 (C) (1) shall be referenced for more than three current-carrying conductors. 3. Section 310.16 shall be referenced for conditions of use.

Ampacity based on NEC ® Table 310.15 (B) (16) (formerly Table 310.16) Allowable Ampacities of Insulated Conductors Rated Up to and Including 2000 Volts, 60° through 90°C (140° through 194°F), Not More Than Three Current-Carrying Conductors in Raceway, Cable, or Earth (Directly Buried), Based on Ambient Temperature of 30°C (86°F).