![]() Note: View additional wire size charts from the list below. Ampacity is the maximum continuous current carrying capacity of a wire inside a cable or raceway. The ampacity chart below shows allowable ampacities of insulated conductors rated up to and including 2000 Volts, 60☌ through 90☌ (140☏ through 194☏), not more than three current-carrying conductors in raceway, cable, or earth (directly buried), based on ambient air temperature of 30☌ (86☏). 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 90C (140 through 194F), Not More Than Three Current-Carrying Conductors in Raceway, Cable, or Earth (Directly Buried), Based on Ambient Temperature of 30C (86F). Check the table below for the AWG wire size chart. Wire Size Chart and Maximum Amp Ratings Source: NFPA 70, National Electrical Code, Table 310.15(B)(16) SIZE commercial wiring demands range from 2 (95 amp maximum) or 3 (85 amp maximum) to 14 (15 amp maximum). The wire size chart below shows allowable ampacities of insulated conductors rated up to and includingĢ000 Volts, 60☌ through 90☌ (140☏ through 194☏), not more than three current-carryingĬonductors in raceway, cable, or earth (directly buried), based on ambient air temperature of 30☌ (86☏). The number of devices connected to the circuit usually determines how much current will flow through the wire. It is important to pick the correct size of wire so that the wire doesn't overheat. Current (ampacity) Notes: The current ratings shown in the table are for power transmission and have been determined using the rule of 1 amp per 700 circular mils, which is a very conservative rating. Limit that a wire can handle before damage occurs. Each wire size, or wire gauge (AWG), has a maximum current
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