Electric lighting. Protective security measures

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

Electric lighting. A common part. Protective security measures

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

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6.1.37. Protective grounding of electric lighting installations must be carried out in accordance with the requirements of Ch. 1.7, as well as additional requirements given in paragraphs. 6.1.38 - 6.1.47, 6.4.9 and ch. 7.1, 7.2, 7.3, 7.4.

6.1.38. Protective grounding of metal cases of general lighting fixtures with incandescent lamps and fluorescent lamps, DRL, DRI, DRIZ, sodium lamps with ballasts built into the lamp should be carried out:

1. In networks with grounded neutral - connection to the grounding screw of the luminaire housing PE conductor.

Grounding of the luminaire housing by a branch from the neutral working wire inside the luminaire is prohibited.

2. In networks with isolated neutral, as well as in networks switched to battery power, by connecting a protective conductor to the ground screw of the luminaire body.

When entering wires that do not have mechanical protection into the luminaire, the protective conductor must be flexible.

6.1.39. Protective grounding of housings of general lighting fixtures with DRL, DRI, DRIZ, DNAT and fluorescent lamps with remote ballasts should be carried out using a jumper between the grounding screw of the grounded ballast and the grounding screw of the luminaire.

6.1.40. Metal reflectors of luminaires with housings made of insulating materials do not need to be grounded.

6.1.41. Protective grounding of metal housings of local lighting fixtures for voltages above 50 V must meet the following requirements:

1. If the protective conductors are connected not to the luminaire body, but to the metal structure on which the luminaire is installed, then there must be a reliable electrical connection between this structure, the bracket and the luminaire body.

2. If there is no reliable electrical connection between the bracket and the luminaire body, then it must be made using a protective conductor specially designed for this purpose.

6.1.42. Protective grounding of metal cases of general lighting fixtures with any light sources in rooms both without increased danger, and with increased danger and especially dangerous, in newly built and reconstructed residential and public buildings, as well as in administrative, office, household, design, laboratory, etc. premises of industrial enterprises (approaching in nature to the premises of public buildings) should be carried out in accordance with the requirements of Ch. 7.1.

6.1.43. In rooms without increased danger of industrial, residential and public buildings at voltages above 50 V, class I portable lamps according to GOST 12.2.007.0-75 "SSBT. Electrical products. General safety requirements" must be used.

Group lines supplying socket outlets must be carried out in accordance with the requirements of Ch. 7.1, while in networks with an isolated neutral, the protective conductor should be connected to the ground electrode.

6.1.44. Protective conductors in networks with grounded neutral in group lines supplying general lighting fixtures and socket outlets (clauses 6.1.42, 6.1.43), zero working and zero protective conductors are not allowed to be connected under a common terminal.

6.1.45. When performing protective grounding of outdoor lighting fixtures, reinforced concrete and metal supports, as well as cables, must also be connected to the ground electrode in networks with isolated neutral and to the PE (PEN) conductor in networks with grounded neutral.

6.1.46. When installing outdoor lighting fixtures on reinforced concrete and metal poles of electrified urban transport in networks with isolated neutral, it is not allowed to ground lighting fixtures and poles; in networks with grounded neutral, lighting fixtures and poles must be connected to the pen conductor of the line.

6.1.47. When supplying outdoor lighting with overhead lines, protection against atmospheric overvoltages must be carried out in accordance with Ch. 2.4.

6.1.48. When performing power supply circuits for lamps and socket outlets, the requirements for installing RCDs set forth in Ch. 7.1 and 7.2.

6.1.49. For outdoor lighting installations: lighting of building facades, monuments, etc., outdoor illuminated advertising and signs in TN-S or TN-CS networks, it is recommended to install an RCD with a trip current of up to 30 mA, while the background value of leakage currents should be, according to at least 3 times less than the RCD operation setting for differential current.

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

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