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Slab boxes, how difficult it is to decide which one to use, isn't it? The octagonal junction box for slabs facilitates the positioning and fixing of electrical conduits, is flame retardant, and supports temperatures between -5 degrees and 60 degrees positive. It has several entries for 20, 25 and 32 mm electrical conduits. In this video, I show how to handle the octagonal flex junction box with a fixed bottom by supports that need to be cut for better performance and handling with protection against the entry of concrete fluid. It is always a good idea to observe all junction boxes before starting the piping and fixing; learning the advantages and disadvantages of their use before concreting can prevent future damage after concreting. Watch this video for the simplest and most effective way to fix and protect an octagonal junction box before starting its concreting. Many thanks to everyone who supports this channel. Leave your like, share the video and be sure that others will come up with new ideas and solutions for the day to day life of an electrician. Thank you.