Ana rarraba ƙofofin wuta zuwa Grade A, Grade B da Grade C bisa ga juriyar wutar su. Lokacin juriyar wuta na Class A Ƙofar wuta ba za ta kasance ƙasa da sa’o’i 1.5 ba, na Ƙofar wuta ta Class B ba za ta kasance ƙasa da sa’a 1 ba, kuma na Ƙofar wuta ta Class C ba za ta kasance kasa da sa’o’i 0.6 ba. Wurare daban-daban za a sanye su da kofofin wuta na matakan da suka dace don amfani.

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