I just bought a old little ''furnas'' air compressor that has a electrical box thing on it that say ''MAX POWER 1Hp 110 - 220V'' so i connected the wires to a power cable and plugged it in for about 2 seconds and it was really loud and smelled like it was burning. i could also see sparks. i'm wondering if all small compressors are loud and if the smell was burning dust. but i don't get why it was sparking.