TIA TSB-184-A-1-2019 PDF

Full title and description

Guidelines for Supporting Power Delivery Over Balanced Twisted‑Pair Cabling — Addendum 1: use of 28 AWG cords. This document is an addendum to TIA TSB‑184‑A that provides installation guidance, ampacity and bundle‑sizing guidance, and thermal considerations specifically for the use of 28 AWG cord (patch) cables when supporting Power over Ethernet (PoE) delivery.

Abstract

TSB‑184‑A‑1 (2019) supplies practical installation recommendations to enable the safe use of 28 AWG cord cables for DC power delivery over balanced twisted‑pair cabling. The addendum clarifies limits on bundle size, provides ampacity guidance and expected temperature rise, identifies compatibility constraints with PoE classes, and advises against using cord cables smaller than 28 AWG for power delivery. It is intended to supplement the baseline TSB‑184‑A guidance rather than replace it.

General information

• Status: Current / Published (addendum to TSB‑184‑A).
• Publication date: February 2019 (published as TSB‑184‑A‑1, 2019).
• Publisher: Telecommunications Industry Association (TIA).
• ICS / categories: Telecommunications; structured cabling; Power over Ethernet (PoE); installation guidance.
• Edition / version: Addendum 1 to TSB‑184‑A (TSB‑184‑A issued earlier; this is the 2019 addendum focused on 28 AWG cords).
• Number of pages: 14 pages (PDF).

Scope

Defines installation and safety guidance for delivering DC power over balanced twisted‑pair cord cables of 28 AWG size in premises and patch‑cord applications. The addendum addresses recommended maximum bundle sizes for a target temperature rise (commonly referenced as a 15 °C rise in many TSB‑184 analyses), ampacity tables for 28 AWG cords, installation constraints (routing, separation and bundle layout), and cautions about smaller conductor sizes. It is intended to be used together with TSB‑184‑A and the relevant ANSI/TIA cabling performance standards and IEEE PoE equipment standards.

Key topics and requirements

• Installation guidance specific to 28 AWG patch/cord cables supporting PoE power delivery (ampacity and bundling limits).
• Recommended maximum bundle sizes for 28 AWG cords to limit temperature rise in the bundle (thermal management guidance).
• Tables and worked examples for estimating temperature rise and steady‑state ampacity in common installation scenarios.
• Advice to avoid using cord cables smaller than 28 AWG for power delivery and notes on safety/connector considerations.
• References to related cabling and connector standards and to IEEE PoE family (802.3af/at/bt) for interoperability context.

Typical use and users

Used by network designers, cabling installers, facilities engineers, patch‑cord and cable manufacturers, product specifiers, and safety/standards compliance personnel. Typical applications include specifying patch‑cord types and allowable bundle practices in PoE deployments (IP cameras, wireless APs, IoT devices, and similar powered devices) where smaller, flexible patch cords (28 AWG) are desired for space or routing reasons.

Related standards

Primary baseline: TIA TSB‑184‑A (Guidelines for Supporting Power Delivery Over Balanced Twisted‑Pair Cabling). Related documents include ANSI/TIA‑568.2‑D (balanced twisted‑pair cabling performance), IEEE 802.3 PoE standards (802.3af/at/bt), and connector/coupling test methods such as IEC 60512 series referenced for contact/arc considerations. The addendum is intended as a supplement to the listed TIA standards.

Keywords

TSB‑184‑A‑1, TIA, addendum, 28 AWG, patch cord, PoE, Power over Ethernet, ampacity, bundle sizing, temperature rise, structured cabling, installation guidance.

FAQ

Q: What is this standard?

A: It is TIA TSB‑184‑A‑1 (2019), an addendum to TSB‑184‑A that gives guidance for using 28 AWG cord (patch) cables to support power delivery over balanced twisted‑pair cabling.

Q: What does it cover?

A: Installation guidance, ampacity and bundle sizing for 28 AWG cords, expected temperature‑rise considerations, examples/tables for designers and installers, and recommendations to avoid conductor sizes smaller than 28 AWG for power delivery.

Q: Who typically uses it?

A: Cabling/system designers, installation contractors, cable and patch‑cord manufacturers, network operations and facilities personnel who must assess safe PoE deployment practices for small‑gauge patch cords.

Q: Is it current or superseded?

A: As published it is a 2019 addendum and is listed as a current/published addendum to TSB‑184‑A; users should check TIA’s records for any subsequent revisions or newer addenda before finalizing long‑term specifications.

Q: Is it part of a series?

A: Yes — it is an addendum to TIA TSB‑184‑A and is part of the TIA TSB series of technical service bulletins that provide guidance related to ANSI/TIA structured cabling standards.

Q: What are the key keywords?

A: 28 AWG, patch cord, ampacity, bundle size, temperature rise, PoE, TSB‑184, TIA, addendum.