---
title: Marking
description: "The above table shows the marking on Type ‘n’ equipment to indicate the method applied to either eliminate or control spark energy and/or hot surfaces. The following is an example \"od\" marking applied to type-n equipment containing sparking contacts protected…"
url: "https://www.eicstech.com/kb/type-n-equipment/basics-on-type-n-marking/"
updated: "2022-06-01"
category: "Explosion Proof Basics / Type 'n' Equipment"
---

# Marking

The above table shows the marking on Type ‘n’ equipment to indicate the method applied to either eliminate or control spark energy and/or hot surfaces.

The following is an example "od" marking applied to type-n equipment containing sparking contacts protected by a method other than energy limitation.

**Ex nC IIB T5**