An IP rating must begin with 5 for partial dust protection or 6 for complete dust protection. The IP rating is two digits, with the first and second digit defined as follows: First Digit (intrusion protection) 0. (or X - see section below): No special protection. Not rated (or no rating supplied) for protection against ingress of this type. 1. Protection from a large part of the body such as a hand (but no protection from deliberate access); from solid objects greater than 50mm in diameter. 2. Protection against fingers or other object not greater than 80mm in length and 12mm in diameter (accidental finger contact). 3. Protection from entry by tools, wires etc, with a diameter of 2.5 mm or more. 4. Protection against solid objects larger than 1mm (wires, nails, screws, larger insects and other potentially invasive small objects such as tools/small etc). 5. Partial protection against dust that may harm equipment. 6. Totally dust tight. Full protection against dust and other parti