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 junction box. At first. The Cantex junction box is a surface mounted enclosure without entrance hub which allows multiple conduits to be connected and wire splices made within. Quality control approved in Canada. Plastic junction boxes for indoor wiring cost 50% to 80% less than metal boxes but aren't as durable. Cost. Visit The UPS Store® today and ask our certified packing experts about our Pack & Ship Guarantee. If you're looking to ship larger items, please contact your neighborhood location to inquire about The UPS Store freight. The EZJ-BOX (EZ Junction Box) series features select Magnitude Lighting Class 2, electronic LED drivers integrated into a simple surface-mounted, multi-channel junction box, making it the perfect product for multi-output needs in tape lighting, tube lighting, linear lighting, and multiple other.