Aluminum wire has a lower ampacity than the same gauge copper wire, meaning aluminum must be larger to accomplish the same ampacity job as copper wire. The rule-of-thumb sizes rely on the lowest ...

The cables are installed in cable tray and comply with the requirements of Sec. 392.80(A)(2)(c). So, we can use the ampacity values found in Table 310.15(B)(17). The 1,000A breaker has 90°C rated ...

The free Ampacity Calculator app recently released from Cerrowire helps electricians determine the ampacity of conductors in conduit, cable, or directly buried based on the National Electrical Code.