Approved 02 : Acceptable to the authority enforcing the rules. (Electrical devices which carry UL, FM or CSA approval are normally acceptable.) (RP 14F)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}