What is the minimum size of the secondary conductors between the transformer and the main breaker?

Calculating the Minimum Size of Secondary Conductors

When determining the minimum size of the secondary conductors between the transformer and the main breaker, you need to take into account the transformer's KVA rating, the voltage, and the length of the conductors.

Firstly, we have calculated the secondary current of the transformer to be approximately 1080.77 amps, as mentioned earlier.

The length of the secondary conductors between the transformer and the main breaker is given as 13 feet. According to electrical codes and standards, the minimum allowed conductor size can be calculated using the ampacity of the conductors and the distance they need to cover.

The ampacity of the conductors is determined by the current flowing through them, which in this case is 1080.77 amps. With this information, you can consult the ampacity tables in the National Electrical Code (NEC) to find the minimum required conductor size for a certain current rating and distance.

It is crucial to ensure that the conductor size chosen can safely carry the load without overheating and causing a fire hazard. If in doubt, consulting a licensed electrician or referring to the NEC for specific regulations is recommended.

By following these guidelines and calculations, you can determine the appropriate size of the secondary conductors to ensure the safe and efficient operation of the electrical system.