IEEE Std 1844-2025 PDF

Full title and description

IEEE Standard for Determining Circuit Integrity Performance of Fire Resistive Cables in Nuclear Facilities — a revision that establishes test methods and acceptance criteria for energized cable systems subject to standardized fire exposure to produce circuit-integrity time ratings used in nuclear power plant safety systems.

Abstract

This revision (1844-2025) provides a standardized procedure for subjecting energized power, control, instrumentation and communication cable systems to defined fire exposures and measuring their ability to maintain functionality (circuit integrity) for specified time ratings (e.g., 1-hour and 3-hour performance levels). The standard is intended to produce repeatable, comparable test results for cable selection, qualification, and regulatory use in nuclear facilities.

General information

• Status: Active standard.
• Publication date: 01 August 2025 (published).
• Publisher: Institute of Electrical and Electronics Engineers (IEEE).
• ICS / categories: Cables — ICS 29.060.20 (electrical cables standards).
• Edition / version: 2025 edition (supersedes IEEE 1844-2015).
• Number of pages: 28 pages (PDF/hardcopy editions).

Scope

The standard specifies test procedures and acceptance criteria for determining circuit-integrity time ratings of energized cable systems used in nuclear power facilities. It covers types of cables commonly relied upon for safety functions (power, control, instrumentation, communications) and defines how to arrange and expose energized circuits to a standard fire environment and evaluate functionality throughout the prescribed test. The purpose is to provide uniform, repeatable results for product comparison and selection in safety-critical applications.

Key topics and requirements

• Test setup and specimen preparation for energized cable systems under standardized fire exposure.
• Acceptance criteria based on maintaining electrical functionality for specified time ratings (e.g., 1-h and 3-h circuit-integrity objectives).
• Procedures for instrumentation, monitoring, and data collection during fire exposure.
• Guidance for test reproducibility, repeatability, and comparison of competing cable constructions.
• Applicability to nuclear safety-related circuits and use by manufacturers, test laboratories, and regulatory bodies.

Typical use and users

Primary users include nuclear utility engineers, cable manufacturers, independent test laboratories, plant designers, and regulatory or compliance personnel who specify or verify fire-resistive cable performance for safety-related circuits. The standard is used to qualify cable constructions, support procurement specifications, and inform safety-case documentation in nuclear facilities.

Related standards

Documents commonly referenced alongside or informing circuit-integrity testing include the prior edition IEEE 1844-2015 (superseded by this revision), IEC/ISO circuit-integrity test series such as IEC 60331 (tests for electric cables under fire conditions — circuit integrity), and other IEEE cable qualification and flame-performance standards (for example IEEE 383 family and IEEE 1202 vertical-tray flame tests) depending on application and regulatory requirements.

Keywords

circuit integrity, fire-resistive cable, energized cable testing, nuclear facilities, cable qualification, fire exposure test, 1-hour rating, 3-hour rating, insulated conductors, safety systems.

FAQ

Q: What is this standard?

A: IEEE Std 1844-2025 is the IEEE standard that defines test procedures and acceptance criteria for determining the circuit-integrity performance of fire-resistive, energized cable systems used in nuclear power facilities.

Q: What does it cover?

A: It covers methods to expose energized cable systems to a defined fire environment, instrumentation and monitoring during the test, and acceptance criteria based on maintaining electrical functionality for prescribed time ratings (used to demonstrate that safety circuits can be preserved during fire conditions).

Q: Who typically uses it?

A: Nuclear utility engineers, cable manufacturers, third‑party test laboratories, plant designers, procurement specialists, and regulators use the standard to qualify and compare cable products and to support safety-related design and acceptance decisions.

Q: Is it current or superseded?

A: It is current (active). IEEE 1844-2025 was published 01 August 2025 and supersedes IEEE 1844-2015.

Q: Is it part of a series?

A: The standard is part of IEEE’s portfolio of insulated conductors and cable test standards and is commonly used in conjunction with related international and IEEE tests for fire performance and cable qualification (e.g., IEC 60331 series for circuit integrity, IEEE 383 family for Class 1E cable qualification, IEEE 1202 flame testing), depending on application and regulatory context.

Q: What are the key keywords?

A: circuit integrity, fire-resistive cable, energized testing, nuclear safety, cable qualification, fire exposure, 1-hour rating, 3-hour rating.