Among the most common ratings you'll encounter are IP65, IP66, and IP67. This article breaks down what each of these ratings means, compares their protective capabilities, and shows how E‑abel has helped customers apply them effectively through real‑world projects. What Is an IP. IP66 rated cabinet performance is quickly becoming the new standard for serious outdoor deployments. When you are placing active equipment outside controlled spaces, you cannot afford to gamble on marginal protection. There are two main standards: NEMA (National Electrical Manufacturers. The choice between IP and NEMA ratings often depends on your location and specific requirements. However, for North American installations, NEMA standards offer more comprehensive protection criteria. The term 'intrusion' refers to the protection level provided to prevent access to mechanical or electrical parts, and the degree of.