Explain rising mains and rising buses in high rise building
Answers
Answer:
The phrase “rising electrical mains” refers 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, access duct or electrical room. 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. In the USA, this work must be done according to the National Electrical Code (NEC).
Answer:
In large buildings the type of distribution depends on the building type, dimension, the length of supply cables, and the loads. The distribution system can be divided in to: The vertical supply system (rising mains) The horizontal supply (distribution at each floor level)