These Polycarbonate and high-impact ABS molded enclosures meet NEMA 4X specifications and are. Available in a variety of sizes, these molded enclosures are offered in. Light gray polycarbonate body and clear polycarbonate cover. Body/Cover - UV stabilized , UL94V-2 flammability rating, suggested service temperature -40 to 120°C. PN-Series enclosures feature a smooth, flat top cover. In order to maintain NEMA 4X rating, cable glands must be used when cables enter or exit the enclosure.