Helunsi Waterproof IP68 External Junction Box, 2 Way Outdoor Junction Box, Underground Plug Line Coaxial Cable Connector Wire Range 5 to 15mm Electrical Power Cord Weatherproof Junction Boxes - Black

Used it in a marine application and it was excellent splice box for 3 conductors of #10 wire.

Worked very well to splice an outdoor power cable for a septic system lift pump. The box is left above ground under a fake rock, so I have not tested the weatherproofing as well as some other applications might.

Went together well and it appears to be well made. I have little expectation that plastic is very durable, but we shall see.

It was a little hard to work with but I like the features of the box

Used this to replace my pool light without pulling a new cable so it will be submerged forever. I soldered the connections and then filled the box with a pourable silicone. Normally you have to pull the old cable (mine is 100ft) out but after 20 years it is almost impossible to break it loose and pull the new one through. The best price I found was $250 for the labor.Way easier and cheaper to use this j-box but if it fails it'll ruin a $500 light. Works great so far but just installed April 2024. I'll update this if there is any problem.

I have a Wyze V3 camera on my back fence and needed to power it from a source more than 50 feet away. Used a 12 v power plug in a 110 V outlet and ran outdoor lighting wire to this box next to the fence. Put a 12 v DC to 5VDC converter in the box, buried it in the yard next to the fence. Ran a flat a 6 foot USB cable out of it to the camera on the fence. The box is not visible and is safely buried away from people and dogs. I live in Phoenix Arizona and the heat gets to 114 and occasionally it rains enough to flood the yard. The DC to DC converter has not over heated (probably because it's buried more than a foot in the ground) and the box has not leaked to let in any water. Recommend this box for keeping power supplies dry in outdoor environments.

would not fit my wire

This product proved unusable to me for the simple fact that the ports were 15mm and I needed to push a 19mm connection through.I cannot blame them for that,1: they do provide a splicing port (I do not wish to cut my connectors off and splice)2: I could have confirmed the size of the port vs connector beforehandHopefully this review will help someone by encouraging them to double check the size of their wire+connector before ordering.However, I am going to remove a star because of the terrible screws and design for sealing the lid.The small screws are cheap metal and wallow out easily, and the hole intended to screw them into is too narrow, requiring significant force to screw them down tight (even pushing down hard, the screw heads wallow).This can be solved by using your own screws.I do appreciate the extra rubber gaskets they provided for potential different gauge wire, that was a nice touch!!