InterNACHI Electrical Practice Exam

UF cable, or Underground Feeder cable, is specifically designed and listed for direct burial in the ground. It is constructed with moisture-resistant materials that can withstand the conditions associated with soil, including humidity, dirt, and potential chemical exposure. This makes UF cable suitable for outdoor applications, particularly where it will be buried, such as connecting outdoor buildings or powering landscape lighting.

In contrast, NM cable (Non-Metallic Sheathed Cable) is intended for indoor use only and should not be used in damp or wet locations, making it unsuitable for direct burial. SE cable (Service Entrance cable) is used to connect the utility service to the building but is not listed for direct burial. AC cable (Armored Cable) is also not suitable for direct burial without additional protection, as it is designed primarily for indoor use with a metal sheath that does not provide moisture protection required for underground applications.