Junction box costs range from low‑price indoor models ($10‑$60) to weatherproof units ($70‑$450), with installation averaging $100‑$300 depending on location and materials. If you're planning any electrical work, one of the small but important items on your list will be the. The 24V junction box is a critical component in electrical systems, especially in low-voltage applications such as solar power, automotive, and industrial control systems. It serves as a central point for connecting and protecting electrical wires, ensuring safe and efficient power distribution. Choose from our selection of junction boxes, including over 2,800 products in a wide range of styles and sizes. Find local businesses, view maps and get driving directions in Google Maps. The ASI SCE-244812WFLP is an NEMA 3R, 4, 12 Rated Electrical Enclosure.