Question: what is the difference between nema 12 and nema 4?
Answer: Thus, the NEMA 4 and NEMA 4X rated enclosures actually offer a somewhat more advanced level of protection than NEMA 12 enclosures. NEMA 4 enclosures offer protection against the following hazards, both indoor and outdoor: Splashing, dripping and hose-directed water. Access to hazardous parts.