Potentially explosive atmosphere LED luminaires.

Directive 2014/34/EU (ATEX) applies to equipment used in potentially explosive atmospheres, and the conformity assessment of LED luminaires according to it depends on whether the luminaire is intended for use in a potentially explosive environment; if so, the manufacturer must demonstrate compliance by selecting the appropriate module (e.g., A, B, C, D, E) and often using a notified body and ensuring that the product (and the manufacturing process) meets the essential safety requirements of the directive, after which the product is affixed with the CE marking.

1. Scope of the directive:

If an LED luminaire is intended for use in mines, chemical plants, oil refineries, or other areas where there is a risk of dust or gas explosions, the ATEX Directive 2014/34/EU applies.

Other directives (such as LVD, EMC) apply to LED luminaires intended for normal household or general use.

2. Steps in conformity assessment (ATEX):

The manufacturer must identify the potential explosion hazards posed by the luminaire (e.g., sparking, hot surfaces, electrical ignition sources).

Define the zone of the area to be used (Zone 0, 1, 2 for gas; Zone 20, 21, 22 for dust) and the equipment (luminaire) class (I, II) and group (A, B, C/D).

The manufacturer selects the conformity assessment procedure (module) based on the category of the device and the production volume (e.g., series production vs. single piece). The options include A (internal control), B (EC type examination), C (type conformity), D (quality assurance), E (quality assurance), H (total quality assurance). A production-related module (D, E, H) is also often required.

Notified body: In more demanding classes (e.g. Class I, II, Group IIC), an assessment by a notified body is required to check the type (B, C) and/or quality system (D, E, H).

A comprehensive technical file is compiled to demonstrate compliance with the requirements.

Declaration of conformity: The manufacturer draws up an EU declaration of conformity.

CE marking + Ex marking: In addition to the CE marking, a special Ex marking (e.g. Ex II 2 G Ex db IIC T4 Gb) must be affixed.

Summary for LED luminaires in the ATEX context: