PPE intended for use in potentially explosive atmospheres must be designed and manufactured in such a way that it cannot be the source of an electric, electrostatic or impact-induced arc or spark likely to cause an explosive mixture to ignite. - see 2016/425/EU

The guideline of the same says:

Equipment and Protective Systems intended for use in Potentially Explosive Atmospheres (ATEX) Directive 2014/34/EU

Equipment covered by the PPE Regulation is specifically excluded from the ATEX Directive and shall not be marked with the specific marking of explosion protection. However, the manufacturer of PPE for use in potentially explosive atmospheres is required to consider EHSR 2.6. PPE intended for use in explosive atmospheres must be so designed and manufactured that it cannot be the source of an electric, electrostatic or impact-induced arc or spark likely to cause an explosive mixture to ignite. Following the Essential Health and Safety Requirements in the ATEX Directive would be one way to demonstrate compliance.

PPE intended to be used in potentially explosive atmospheres, should:

• have anti-static properties which remain effective during all its service life when used and maintained correctly in accordance with the manufacturer's instructions and information;
• be made of materials which are known not to cause sparks e.g. by impact;
• strictly avoid the use of PPE components that are likely to initiate sparks by shock or friction;
• not include unprotected electric components or parts which do not comply (where relevant) to Directive 2014/34/EU of 26 February 2014 on the harmonisation of the laws of the Member States relating to equipment and protective systems intended for use in potentially explosive atmospheres (ATEX Directive)
• give adequate warning in the instruction for use;
• take into account other relevant factors in foreseeable use.
• Equipment covered by the PPE Regulation is specifically excluded from the ATEX Directive 2014/34/EU and shall not be marked with the specific marking of explosion protection defined in that Directive or wording to this effect.

It means that all PPE used in potential hazardous environment shall comply with the requirements of safe use (E.g clothing) and those having own ignition sources (E.g torch, radio, cellphone, etc.) shall comply with the ATEX Directive. 

Note: documentation shall clearly communicate how to maintain the conditions of safe use (NO ignition source, etc.). SEE in case of clothing the washing / cleaning procedure!!!

Keep up the good work!

Arpad
veress@exprofessional.com