GOST 33326-2015 PDF

Full title and description

GOST 33326-2015 — "Кабели и провода для подвижного состава железнодорожного транспорта. Общие технические условия" (English: "Cables and wires for rolling stock of railway transport. General specifications"). The standard establishes technical requirements, classification, marking, testing and rules for storage, transportation and acceptance of low-fire-hazard cables and wires intended for internal and external electrical connections on railway rolling stock.

Abstract

GOST 33326-2015 specifies parameters, properties and test methods for cables and wires used on railway rolling stock (including special rolling stock). It covers construction and materials (conductors, insulation, sheaths), fire-behaviour classes (including halogen-free/low-smoke variants), mechanical and environmental resistance (vibration, impacts, temperature, ozone, sunlight, oils), electrical ratings and acceptance/qualification test regimes. The document also defines marking, packaging, storage and manufacturer warranty provisions.

General information

• Status: Active / in force (introduced as an interstate standard and adopted as a national standard of the Russian Federation).
• Publication date: Approved September 10, 2015; effective (date of introduction) March 1, 2016; amendment No.1 introduced October 1, 2019.
• Publisher: Adopted by the Interstate Council / Federal Agency for Technical Regulation and Metrology (Rosstandart); developed by the relevant interstate technical committee for railway transport.
• ICS / categories: MKS / ICS 29.060.01 (Electrical equipment and cables for railway transport / cable products).
• Edition / version: First issue (2015). Includes Change/Amendment No.1 (2019).
• Number of pages: commonly published as approximately 23 pages (various official/electronic libraries list 20–24 pages depending on formatting; standard distribution editions are typically 20–24 pages).

Scope

The standard applies to cables and wires of reduced fire hazard intended for internal and external electrical connections on railway rolling stock (including special rolling stock). It covers products for stationary group laying and for connections to equipment mounted on moving parts, as well as inter-car and inter-section joints. Nominal voltage ranges specified include up to 660 V AC (1000 V DC) for cables and a range of voltages for wires (examples: 660 V, 1000 V, 2000 V, 3000 V, 4000 V AC and corresponding DC ratings). It sets requirements for mechanical, electrical and fire-safety performance, sampling and test categories (qualification, type, acceptance and periodic tests), marking, packaging, transportation and storage.

Key topics and requirements

• Classification of cable/wire types by construction, conductor material (commonly tinned copper), insulation and sheath materials, presence of screen or braid, and special designators for fire performance (e.g., нг(А), нг(А)-HF).
• Fire-safety and smoke/toxicity limits: requirements for non‑propagation of flame in group laying, low-smoke and halogen-free variants, limits on halogen acid gas emission and pH/acid number of combustion products.
• Electrical ratings and thermal performance: nominal voltages for cables and wires, continuous conductor operating temperatures (typical minimums around 90 °C for conductor heating) and testing at specified voltages.
• Mechanical and environmental resistance: tests for vibration, repeated impacts, bending and torsion, ozone resistance, sunlight (UV), resistance to oils and diesel fuel, frost/icing resistance, and resistance to biological attack for tropical variants.
• Test regimes and categories: qualification, type, acceptance and periodic tests are defined; sampling rules and test methods (referenced national/international methods) are given.
• Marking, packaging and traceability: on-cable marking interval, drum/coil label contents (manufacturer, designation, conductor count and cross-section, voltage, date, length, gross mass, conformity mark), and packaging rules for delivery.
• Service life and warranties: for fixed installations a minimum service life is specified (examples in the standard indicate 30 years for permanently fixed installations; specific service-life and maintenance rules for movable connections are set in technical conditions for particular cable/wire types).

Typical use and users

Primary users are railway rolling-stock designers and manufacturers, suppliers and manufacturers of railway cables and wires, test laboratories and certification bodies, component engineers responsible for electrical installations on locomotives, EMUs, passenger cars and specialized rail vehicles, and regulatory/inspection organizations ensuring compliance with railway safety requirements. The standard is also used by purchasers and maintenance organizations to specify and verify cable/wire performance.

Related standards

Key related documents include the earlier national standard replaced by this standard (GOST R 54965-2012 was superseded by GOST 33326-2015), other railway cable and rolling-stock electrical standards and regional/interstate railway technical regulations. The standard references normative test methods and cross-references to national standards for marking, packaging and environmental categories (for example, ГОСТ 18690 on cable marking/packaging and ГОСТ 15150 on climatic categories).

Keywords

cables; wires; rolling stock; railway transport; fire safety; halogen-free; low-smoke; tests; vibration resistance; insulation; sheathing; marking; acceptance tests. (Russian keywords: кабели; провода; подвижной состав; пожарная безопасность; нг(А); HF; методы испытаний).

FAQ

Q: What is this standard?

A: GOST 33326-2015 is an interstate / national standard that sets general technical specifications for cables and wires intended for use on railway rolling stock, covering construction, performance, tests and delivery requirements.

Q: What does it cover?

A: It covers low-fire-hazard cables and wires for internal and external electrical connections on rolling stock, their classification, required properties (electrical, mechanical, environmental, fire/combustion behavior), test programs (qualification/type/acceptance/periodic), marking, packaging, storage and manufacturer guarantees. Voltage ranges and examples of climates/executions are specified in the standard.

Q: Who typically uses it?

A: Rolling-stock designers and manufacturers, cable producers, test and certification laboratories, procurement/specification engineers and maintenance organizations for railways are the main users. Regulators and conformity assessment bodies use it for compliance verification.

Q: Is it current or superseded?

A: As published, GOST 33326-2015 is the active standard that replaced GOST R 54965-2012; it was approved in September 2015 and came into force on March 1, 2016. Amendment No.1 entered into force October 1, 2019. Users should check national registries for any later revisions or newer related standards.

Q: Is it part of a series?

A: It is an overarching general-conditions standard for railway cables/wires; individual cable and wire types are further specified by technical conditions (ТУ) or by product-specific standards. The document is used alongside other railway- and cable-related standards and test-method standards.

Q: What are the key keywords?

A: Key keywords include: cables, wires, rolling stock, fire safety, halogen-free, low smoke, test methods, vibration resistance, insulation, sheathing, marking, acceptance.