Power supply of the administrative building

2.1 This section provides for: - power supply to consumers of the administrative building; - electric lighting. 2.2 Main power consumers are: - working lighting network; - emergency lighting network; - outlet network; - forced ventilation; - cargo and passenger elevators; - automatic fire alarm system (ASPS); - individual heat station (ITP). 2.2 Working lighting network, forced ventilation and socket network are supplied from VR2 according to power supply category II. In switchgears, circuit breakers and differential circuit breakers with combined disconnectors for corresponding currents are installed on outgoing lines. Distribution and group networks of consumers of category II are made by cable of grade VBGng ls laid in metal trays, bars and channels of floor slabs. The 220B plug sockets are designed for 10A current and are equipped with a protective contact, as well as a protective device that automatically closes the sockets of the plug socket when the plug is removed. Height of installation of all sockets, switches and switches is 1.0m from the level of clean floor. Operating lighting is controlled by motion sensors, switches and switches. 2.3 Elevators, ASPS, ITP, as well as emergency lighting network are powered from VR1 by I category of power supply. Power loads of category I are made with cable of BVGng frls grade laid: - in separate (from consumers of category II) metal trays; - open with attachment with cover brackets to walls and floors. Power supply of ASPS is made by cable of VBGng frls grade laid separately from all other consumers of any category in the inter-ceiling space. This section considers the voltage supply to the installation site of the panel of a particular engineering system and performs a general check of the protection devices with OKZ currents taking into account the data of the sections of engineering systems (AOV, ADPT, ETM).