通常の生産工程では、非防爆機器の使用は厳禁である。
| 機器保護等級（EPL） | Ga | Gb | Gc |
|---|---|---|---|
| 機器の保護等級は、爆発性ガス環境、爆発性粉塵環境、および炭鉱メタン爆発環境のさまざまな特性、ならびに機器が着火源となる可能性に基づいて規定されています。 | In explosive gas environments, equipment is designated with a "very high" level of protection, ensuring that it does not serve as an ignition source during regular operation, anticipated malfunctions, or rare failures. | In explosive gas environments, equipment is assigned a "high" level of protection, ensuring that it does not serve as an ignition source during normal operation or anticipated fault conditic ions. | In explosive gas environments, equipment is typically assigned a "general" ievel of protection, preventing it from serving as an ignition source during regular operation. Furthermore, supplementary protective easures can be implemented to minimize the formation of effective ignition sources, particularly in cases of anticipated and frequent occurrences (e.g. failures in lighting fixtures). |
| ゾーン | Zone 0 | ゾーン1 | ゾーン2 |
しかし、設置、メンテナンス、大規模な修理の際には、定められた手順に従い、これらの活動が爆発的な環境を助長する状況を引き起こさないことが確認されれば、その使用は許可される。
