Ex signifies that the device is designed to be explosion proof. II indicates it's for use in places marked as Group II. 3G and 3D specify the device's suitability for Zone 2 (gases) and Zone 22 (dust) environments, where hazardous atmospheres are present but not expected to occur in. 2026 Explosion-proof Distribution Box - Shenhai Explosion Proof Technology Co. Whether your site falls under NEC Class I/II/III divisions, ATEX zones, or IECEx international certification, choosing the wrong rating is a compliance violation — and a safety risk. This guide covers. of e l pe ents inside. Its robust construction ensures reliable operation in explosive atmospheres, such as those found in oil, gas, and chemical.
