Final answer:
The largest allowable length of flexible metal conduit per transformer on a remote channel letter setup depends on local electrical code requirements and regulations. It is necessary to consult the National Electrical Code or a licensed electrician familiar with local regulations for specific guidelines.
Step-by-step explanation:
The largest allowable length of flexible metal conduit per transformer on a remote channel letter setup depends on the specific electrical code requirements and regulations in your local jurisdiction. In general, the maximum allowable length can vary depending on factors such as the gauge of the conduit, the type of wiring used, and the distance from the transformer to the channel letter setup.
To determine the largest allowable length, you should refer to the National Electrical Code (NEC) or consult with a licensed electrician who is familiar with the local regulations. The NEC provides guidelines and standards for electrical installations, including conduit lengths and requirements.
Therefore, it is not possible to provide a specific length without knowing the specific circumstances and local regulations.