Review on Ultimate Junction Underground Waterproof Electrical Connector - Unmatched Performance and Reliability! by Jimmie Gebrehiwot

. I was trying to connect an external wire from a submersible well to internal wiring for a pressure tank. that some wire gauges and wire types don't fit As far as I can tell the holes on them are good up to about 14 gauge, after that it's not very good to connect to The set screws are very small and not brass And if you're not careful you can take it off The unit's insulation is excellent though A few spacers and o-rings if you know how to reassemble after disassembling