UL 1598A 2025-11 PDF

Full title and description

UL Standard for Safety — Supplemental Requirements for Luminaires for Installation on Marine Vessels (UL 1598A). This entry represents the first edition (originally published December 4, 2000) reprinted with revisions through November 26, 2025; it supplements the Standard for Luminaires (UL 1598) with marine‑specific construction, marking and performance requirements for luminaires intended for shipboard installation.

Abstract

UL 1598A provides supplemental safety requirements that, together with the applicable clauses of UL 1598 (and other referenced luminaire standards), qualify fixed installation luminaires for use on marine vessels. The requirements address the use of grounded shipboard systems, environmental exposure typical of marine atmospheres, and installation contexts governed by United States Coast Guard regulations and the National Electrical Code. The document is intended for designers, manufacturers, test laboratories and Authorities Having Jurisdiction who evaluate marine luminaires.

General information

• Status: Active — Most recent reprint/version is listed as the current active document.
• Publication date: Original edition published 12/04/2000; reprint with revisions through 26 November 2025 (often referenced as 2025‑11).
• Publisher: Underwriters Laboratories (UL).
• ICS / categories: 29.140.40 — Luminaires (Lamps and related equipment / Luminaires).
• Edition / version: Edition 1 (2000); reprint with revisions through November 26, 2025 (document frequently offered as “reprint with revisions through 2025‑11”).
• Number of pages: 17 pages (first edition document length as provided in standards catalogs / distributors).

Scope

Applies to fixed installation luminaires intended for installation on marine vessels that utilize grounded electrical systems; the supplemental requirements are used together with UL 1598 and other relevant luminaire standards to evaluate suitability for shipboard service. The standard references and supports compliance with U.S. Coast Guard electrical engineering regulations (46 CFR Parts 110–113), the National Electrical Code (NFPA 70) where applicable, and recommended shipboard practices such as IEEE 45. UL 1598A does not cover luminaires for hazardous (classified) locations.

Key topics and requirements

• Supplementary construction and performance requirements that overlay the base luminaire standard (UL 1598) for marine service.
• Requirements addressing shipboard grounding and electrical system compatibility (grounded systems and related marking/installation notes).
• Durability and corrosion resistance considerations for marine atmospheres (materials, copper content limits, and protective finishes commonly required for marine‑rated fixtures).
• Ingress‑protection and sealing measures to prevent moisture or salt‑contaminated spray from entering wiring compartments (tests and construction measures applied to marine‑rated luminaires).
• Mechanical strength, mounting and vibration resistance appropriate for vessel installations.
• Marking, identification and documentation required to show suitability for marine installation and the specific electrical system(s) for which the luminaire is evaluated.
• Referenced tests and coordination with other UL luminaire standards (testing performed under UL 1598 along with the UL 1598A supplemental provisions).

Typical use and users

Primary users include luminaire manufacturers who design and certify marine lighting, shipbuilders and naval architects specifying shipboard lighting, independent test laboratories performing safety evaluations, certification bodies, and Authorities Having Jurisdiction such as the U.S. Coast Guard and local inspection authorities. The standard is used during product design, type‑approval/certification and procurement of marine‑rated fixtures.

Related standards

UL 1598A is supplementary to and works in conjunction with: UL 1598 (Standard for Luminaires), UL 8750 (LED equipment for use in lighting products) and other applicable luminaire standards or retrofit kit standards (for example UL 1598C for retrofit kits when relevant). It also references regulatory and industry documents such as the U.S. Coast Guard regulations (46 CFR Parts 110–113), the National Electrical Code (ANSI/NFPA 70) and IEEE 45 (recommended practice for shipboard electrical installations).

Keywords

UL 1598A, marine luminaires, marine‑rated, shipboard lighting, luminaire supplemental requirements, Underwriters Laboratories, grounding, corrosion resistance, salt spray, ingress protection, IEEE 45, USCG 46 CFR.

FAQ

Q: What is this standard?

A: UL 1598A is the UL supplemental standard titled "Supplemental Requirements for Luminaires for Installation on Marine Vessels." It provides marine‑specific safety requirements that supplement the base luminaire standard (UL 1598).

Q: What does it cover?

A: It covers supplemental construction, marking and performance requirements for fixed installation luminaires intended for shipboard service on grounded vessels — including environmental and installation considerations unique to marine atmospheres and shipboard electrical systems (per USCG regulations and applicable electrical codes).

Q: Who typically uses it?

A: Luminaire manufacturers, product safety and compliance engineers, test laboratories, shipbuilders, naval architects, certifying bodies and AHJs (for example U.S. Coast Guard inspectors) use UL 1598A when designing, testing, certifying or approving marine‑rated lighting fixtures.

Q: Is it current or superseded?

A: The first edition was published December 4, 2000; standards distributors list a reprint with revisions through November 26, 2025 and identify the document as the most recent/active publication. Users should confirm the exact revision or reprint date at the time of purchase or certification because publishers may issue corrigenda or additional revisions.

Q: Is it part of a series?

A: Yes — UL 1598A is a supplemental document to UL 1598 (Luminaires) and is applied together with UL 1598 and other applicable UL luminaire standards (for LED equipment, retrofit kits, wet‑location or hazardous‑location standards where relevant). It should be used in the context of the complete set of normative references listed within the UL 1598A text.

Q: What are the key keywords?

A: Marine luminaires; UL 1598A; shipboard lighting; marine‑rated; corrosion resistance; salt spray; ingress protection; grounding; Underwriters Laboratories; USCG; IEEE 45.