An electrical plan's major components include general and specialized electrical requirements, lighting systems, and the electrical distribution system. Every electrical plan must be designed following recognized industry standards, employ appropriate electrical symbols, and adhere to applicable codes. The electrical plan contributes to the safe and smooth operation of the electrical system. While this is important for any home, it is especially important when building a two-story. A concrete slab is thrown to form the top level's floor to construct a two-story building. Circuits are classified into three types: series, parallel, and series-parallel. Individual electrical circuits are typically one or more resistance or load devices.