What is the minimum size of wire to be used for Service Drop?

To determine the minimum size of wire for a service drop, it is essential to understand the standard practices and safety requirements in electrical installations. The correct answer, which specifies 14 mm², aligns with common regulations and industry standards that govern the minimum conductor size for service drops, especially when considering load capacity and safety.

The minimum wire size is critical because it needs to handle the electrical load without overheating, which could present a fire hazard or result in equipment malfunction. Using a larger wire size than what's minimally required can be beneficial for efficiency and longevity of the electrical system, but the specified minimum should always ensure compliance with safety codes.

Options that suggest smaller wire sizes, such as 8 mm², 3.5 mm², or even the larger 22 mm² (which exceeds the minimum requirement), either do not meet the standard capacity needs for service drops or suggest a misunderstanding of typical usage. Smaller wire sizes could lead to inadequate performance or risk of overheating, while larger sizes, while permissible, exceed what is typically necessary for efficient operation in most residential and commercial settings.

Thus, 14 mm² stands out as the correct minimum wire size for a service drop, taking into account safety, performance, and compliance with established electrical standards.