Rising Mains Manufacturers to the main electrical power cables that are installed in a multi-story commercial building. Typically the main power supply cables will come into the building underground and will be accessible in the building through a specially built raceway.
At each floor, there will typically be a tap-off to supply power to each floor. The rising mains will run the entire height of the building. Raising Main work must be done according to the National Electrical Code (NEC).