Elektrik Tesislerinde Topraklamalar Yönetmeliği

Overview

The Regulation on Earthing in Electrical Installations (Elektrik Tesislerinde Topraklamalar Yonetmeligi) was issued by the Ministry of Energy and Natural Resources and published in Official Gazette no. 24500 dated 21.08.2001. It covers the earthing of AC and DC installations below 100 Hz, with separate parts for high-voltage installations, low-voltage installations and the earthing of IT and communication equipment.

Under Article 5, an earthing design must meet four conditions: mechanical and corrosion strength, thermal withstand of the highest fault current, avoidance of equipment damage, and personnel safety against earth-fault voltages. For mechanical and corrosion reasons the minimum earthing conductor cross-section is copper 16 mm2. Article 9(d) requires every installation to have a main earthing busbar to which earthing, protective and bonding conductors connect.

Under Article 10, every earthing system must be visually inspected and tested before commissioning; periodic intervals are given in Annex P. In IT systems R_A x I_d must not exceed 50 V. Where the regulation is silent, EN, HD, IEC and VDE standards apply in that order of precedence (Article 1). The record was read from the consolidated text on mevzuat.gov.tr. The official text should be consulted for current provisions.

Key points

1. Covers earthing of AC and DC installations below 100 Hz; HV, LV and IT/communication equipment earthing rules are in separate parts.
2. Where the regulation is silent, EN, HD, IEC and VDE standards apply in that order.
3. Earthing design must meet four conditions: mechanical/corrosion strength, thermal withstand of highest fault current, avoiding equipment damage, and personnel safety.
4. Minimum earthing conductor cross-section for mechanical/corrosion reasons is copper 16 mm2.
5. Every installation must have a main earthing busbar for earthing, protective and bonding conductors.
6. Every earthing system must be visually inspected and tested before commissioning.
7. Periodic intervals are set in Annex P.
8. In IT systems R_A x I_d must not exceed 50 V.

Using it in design

• In the earthing module (TR profile), enforce the 16 mm2 copper minimum for earthing conductors.
• Define one main earthing terminal per building.
• Add the Annex P periodic test intervals to the commissioning and O&M schedule.
• Model IT-equipment functional earthing per the regulation's dedicated section.

Who should read it

Engineers designing data centre electrical and earthing systems in Turkey, and bodies carrying out inspection and measurement.

Related standards

• IEC 60364-5-54
• EN 50310
• IEC 61936-1

Publication details

Authors

T.C. Enerji ve Tabii Kaynaklar Bakanlığı

Publisher

T.C. Enerji ve Tabii Kaynaklar Bakanlığı

Year

2001

Document number

RG 24500 (21.08.2001)

Document language

Turkish

Source type

Turkish regulation

Access

Free to read

Licence

Bibliographic reference only — the document is not redistributed here; confirm reuse terms at the original source

Citation