Internal lighting. group network

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Section 6. Electric lighting

Internal lighting. group network

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Encyclopedia of radio electronics and electrical engineering / Rules for the installation of electrical installations (PUE)

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6.2.9. The lines of the internal lighting group network must be protected by fuses or circuit breakers.

6.2.10. Each group line, as a rule, should contain no more than 20 incandescent lamps per phase, DRL, DRI, DRIZ, HPS, this number also includes sockets.

In industrial, public and residential buildings, it is allowed to connect up to 60 incandescent lamps each with a power of up to 60 W to single-phase lighting groups of stairs, floor corridors, halls, technical undergrounds and attics.

For group lines supplying light cornices, light ceilings, etc. with incandescent lamps, as well as lamps with fluorescent lamps up to 80 W, it is recommended to connect up to 60 lamps per phase; for lines supplying luminaires with fluorescent lamps up to 40 W inclusive, up to 75 lamps per phase and up to 20 W inclusive - up to 100 lamps per phase can be connected.

For group lines feeding multi-lamp chandeliers, the number of lamps of any type per phase is not limited.

In group lines supplying lamps with a power of 10 kW or more, each lamp must have an independent protection device.

6.2.11. At the beginning of each group line, including those fed from busbars, protection devices must be installed on all phase conductors. Installation of protection devices in zero protective conductors is prohibited.

6.2.12. Working neutral conductors of group lines must be laid when using metal pipes together with phase conductors in one pipe, and when laying cables or stranded wires, they must be enclosed in a common sheath with phase wires.

6.2.13. Joint laying of wires and cables of group lines of working lighting with group lines of safety lighting and evacuation lighting is not recommended.

It is allowed to lay them together on one mounting profile, in one box, tray, provided that special measures have been taken to exclude the possibility of damage to the safety and evacuation lighting wires in the event of a malfunction of the working lighting wires, in the housings and rods of the fixtures.

6.2.14. Lamps for working lighting, safety lighting or evacuation lighting can be powered from different phases of one three-phase busbar, provided that independent lines are laid to the busbar for working lighting and safety lighting or evacuation lighting.

6.2.15. Luminaires installed in suspended ceilings made of combustible materials must have gaskets made of non-combustible heat-resistant materials between the places where they adjoin the ceiling structure in accordance with the requirements of NPB 249-97.

See other articles Section Rules for the installation of electrical installations (PUE).

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