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PUE 7, Chapter 7.4 Fire-hazard areas — clause by clause

PUE 7.4: zone classes P-I/P-II/P-IIa/P-III, equipment selection, luminaires, cables.

🇷🇺 PUE — Rules for Electrical Installations (7th ed.)🕰️ PUE-6 — Rules for Electrical Installations (6th ed., 1985)🇺🇸 NEC — National Electrical Code (NFPA 70)🇪🇺 IEC 60364 / HD 60364 (EU national codes)🌎 NOM-001-SEDE, NBR 5410, AEA 90364, RETIE, NCh 4, CNE🇨🇳 GB 50054, GB 50303, JGJ 16, GB/T 16895 (IEC 60364)🇮🇳 IS 732

Document

DocumentPUE 7, Chapter 7.4 Fire-hazard areas
Edition2003 (ПУЭ-7, гл. 7.4)
StatusCurrent
Issued byMinistry of Energy of Russia
Applies toInstallations in fire-hazard areas: classes P-I, P-II, P-IIa, P-III

Document structure

№Chapter / section
7.4.1–7.4.12Zone classes
7.4.13–7.4.25Equipment selection
7.4.26–7.4.48Luminaires, cables, earthing
PUE 7, Section 1PUE 7, Section 7PUE 7, Chapter 2PUE 7, Chapter 3PUE 7, Section 1PUE 7, Section 1PUE 7, Section 1PUE 7, Chapter 1PUE 7, Section 6 LightingSP 256PUE 7, Section 1PUE 7, Section 1PUE 7, Chapter 2PUE 7, Chapter 4PUE 7, Chapter 7PUE 7, Chapter 7GOST R 50571 Building electrical installations (Russian IEC 60364)PUE 7, Chapter 2PUE 7, Chapter 7SP 158PUE 7, Chapters 2SP 76GOST R 50571Japan: electrical rules (JIS, 100 V)

Zone classes (7.4.3–7.4.12)

P-I — flammable liquids; P-II — combustible dust; P-IIa — solid combustibles (stores, garages); P-III — outdoor.

Equipment (7.4.13–7.4.25)

P-IIa: enclosed luminaires, sealed cabinets; P-I: IP54+.

Luminaires and cables (7.4.26–7.4.48)

Enclosed luminaires IP4X (P-IIa), IP54 (P-I); flame-retardant cables; portable equipment via RCD.

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Data is for reference. Final design decisions must follow current regulations and a qualified engineer.
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