... : 2A Voltage:250VAC/45VDC CE,ISO9000... Explosion proof limit switchDouble-circuit type of limit switch, ... usedWith strong aluminum cast outer shellHigh mechanical strengthWater-proof, oil-proof constructionStructure preventing oil, water and pressureIndicating plate ... /60 HZ for 1 minute between terminals of the same polarity 1500VAC, 50/60 HZ for 1 ... (4) (3) NONC (1) (2) NC Explosion proof limit switch