---
title: "CS 25.1717 Circuit protective devices; EWIS — CS-25 · Avioverse"
description: "(See AMC 25.1717) EWIS components must be designed and installed so they are compatible with the circuit protection devices required by CS 25.1357, so…"
url: "https://avioverse.aero/regulations/easa/cs-25/subpart-h/cs-25-1717"
---

# CS 25.1717 Circuit protective devices; EWIS

Large Aeroplanes (CS-25) · CS-25 · EAR revision 26 Jan 2023

IR Implementing rule

## CS 25.1717 Circuit protective devices; EWIS

(See AMC 25.1717)

EWIS components must be designed and installed so they are compatible with the circuit protection devices required by CS 25.1357, so that a fire or smoke hazard cannot be created under temporary or continuous fault conditions.

\[Amdt 25/5]

IR · CS 25.1717 — CS-25 · ED Decision 2008/006/R · CS-25 Easy Access Rules · EAR revision 26 Jan 2023

AMC Acceptable means of compliance

## AMC 25.1717 Circuit protective devices: EWIS

CS 25.1717 requires that all applicable EWIS components (for example wires, connector pins, terminal blocks, relays, splices) be compatible with the circuit protective devices required by CS 25.1357. This means that when selecting the EWIS components to be used for a specific application, care must be taken to ensure that the proper type and rating of the circuit protective device (e.g., circuit breaker) is selected so that the wire and cables are adequately protected from over-current situations.

\[Amdt 25/5]

AMC · AMC 25.1717 — CS-25 · ED Decision 2008/006/R · CS-25 Easy Access Rules · EAR revision 26 Jan 2023

[All rules in SUBPART H – ELECTRICAL WIRING INTERCONNECTION SYSTEMS](https://avioverse.aero/regulations/easa/cs-25/subpart-h)

Consolidated from the EASA Easy Access Rules (revision 26 Jan 2023, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.