Fa'amatalaga mo Mea u'amea mo Meafaigaluega Fa'aeletise e Mafa'i

O se itu taua e mafaufau i ai mo mea u'amea i masini eletise e le pa'u, o lo latou fa'anaunau lea e fa'amumu fa'afefiloi kesi-ea e ala i aloiafi fa'ainisinia.. Ua fa'ailoa mai e su'esu'ega o le tuufaatasiga o nei metala e tele sona sao i lo latou malosi fa'amumu. To prevent the occurrence of mechanical spark ignition in metal enclosures, specific elemental limitations are mandated. The standards for mea pāpā siosiomaga – General Equipment Requirements – specify the following:

Vasega I

In producing RPL level MA or Mb mea tau eletise e le pa, the composition of aluminum, magnesium, titanium, and zirconium in the enclosure materials must not exceed 15% by mass, and the combined mass percentage of titanium, magnesium, and zirconium must not surpass 7.5%.

Vasega II

For Class II explosion-proof electrical equipment production, the total mass percentage of critical elements in enclosure materials varies based on the protection level: For EPLGa equipment, the total content of aluminum, magnesium, titanium, and zirconium must not exceed 10%, with magnesium, titanium, and zirconium not exceeding 7.5% in total; For EPLGb equipment, the aggregate content of magnesium and titanium must not exceed 7.5%; In the case of EPLGc equipment, apart from fans, fan covers, and ventilation hole baffles meeting EPLGb standards, there are no additional specific requirements.

Vasega III

In manufacturing Class III explosion-proof electrical devices, the required total mass percentage of pertinent elements in the enclosure materials also varies with the protection level: For EPLDa devices, magnesium and titanium content should not exceed 7.5%; For EPLDb devices, the same limitation applies; For EPLDc devices, apart from fans, fan covers, and ventilation hole baffles adhering to EPLDb criteria, there are no further special requirements.