What type of wiring is typically used for outdoor installations?

SOOW (Service Outdoor Oil-resistant Wire) is specifically designed for outdoor installations, making it the most suitable choice for this application. This type of wiring is constructed to withstand various environmental factors such as moisture, sunlight, and temperature variations, which are common in outdoor settings. The insulation on SOOW wiring is robust and offers resistance to oils and chemicals, further enhancing its durability in adverse conditions.

In contrast, indoor-rated wiring is not suitable for outdoor use as it typically lacks the added protection required to endure outdoor elements. Low-voltage wiring, while useful for specific applications, is not necessarily designed for general outdoor use and may not meet power requirements for many outdoor installations. Romex wiring, which is commonly used for indoor wiring, also lacks the necessary weatherproofing features to protect it from the elements and therefore is not recommended for outdoor applications.