{"id":11821,"date":"2026-06-16T15:21:11","date_gmt":"2026-06-16T12:21:11","guid":{"rendered":"https:\/\/efsan.com\/?post_type=avada_faq&#038;p=11821"},"modified":"2026-06-16T15:21:11","modified_gmt":"2026-06-16T12:21:11","slug":"can-i-use-a-category-1-certified-device-in-a-lower-risk-area-like-zone-2-how-does-the-hierarchy-rule-work-in-selections","status":"publish","type":"avada_faq","link":"https:\/\/efsan.com\/en\/faqs\/can-i-use-a-category-1-certified-device-in-a-lower-risk-area-like-zone-2-how-does-the-hierarchy-rule-work-in-selections\/","title":{"rendered":"Can I use a Category 1 certified device in a lower-risk area like Zone 2? How does the hierarchy rule work in selections?"},"content":{"rendered":"<p>Yes, you absolutely can. In ATEX directives, the hierarchy rule always applies: equipment in a higher category can always be used in lower-risk zones. Category 1 devices are accepted in Zones 0, 1, and 2. You might be paying for extra protection you may not need, but it is always compliant.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Yes, you absolutely can. In ATEX directives, the hierarchy rule  [&#8230;]<\/p>\n","protected":false},"author":4,"featured_media":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"faq_category":[503],"class_list":["post-11821","avada_faq","type-avada_faq","status-publish","format-standard","hentry","faq_category-atex-en"],"_links":{"self":[{"href":"https:\/\/efsan.com\/en\/wp-json\/wp\/v2\/avada_faq\/11821","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/efsan.com\/en\/wp-json\/wp\/v2\/avada_faq"}],"about":[{"href":"https:\/\/efsan.com\/en\/wp-json\/wp\/v2\/types\/avada_faq"}],"author":[{"embeddable":true,"href":"https:\/\/efsan.com\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/efsan.com\/en\/wp-json\/wp\/v2\/comments?post=11821"}],"version-history":[{"count":3,"href":"https:\/\/efsan.com\/en\/wp-json\/wp\/v2\/avada_faq\/11821\/revisions"}],"predecessor-version":[{"id":11824,"href":"https:\/\/efsan.com\/en\/wp-json\/wp\/v2\/avada_faq\/11821\/revisions\/11824"}],"wp:attachment":[{"href":"https:\/\/efsan.com\/en\/wp-json\/wp\/v2\/media?parent=11821"}],"wp:term":[{"taxonomy":"faq_category","embeddable":true,"href":"https:\/\/efsan.com\/en\/wp-json\/wp\/v2\/faq_category?post=11821"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}