---
title: "Ex p[i] (Hybrid)"
description: "The parts(s) of an IS system which are marked to indicate that they should be installed in a non-hazardous area (associated equipment **[Ex ia]** etc) may be used in a hazardous area if installed in, for example, a pressurised enclosure…"
url: "https://www.eicstech.com/kb/combined-hybrid-methods-of-protection/basics-on-ex-pi-hybrid/"
updated: "2022-06-02"
category: Explosion Proof Basics / Combined (Hybrid) Methods of Protection
---

# Ex p[i] (Hybrid)

The parts(s) of an IS system which are marked to indicate that they should be installed in a non-hazardous area (associated equipment **[Ex ia]** etc) may be used in a hazardous area if installed in, for example, a pressurised enclosure as illustrated below.

The enclosure marking would then be of the form **Ex p (ia).** Indicating a pressurised enclosure with an intrinsically safe output.

![ex p[i] (hybrid)](https://www.eicstech.com/wp-content/uploads/2022/06/ex-pi.png)