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Re: overwhelmed w/ electrical
Because you can't troubleshoot a butt splice very well. If the butt splice insulator is sized correctly, there is no possible way to get a meter lead in there. If you can get a meter lead in there, the splice is not sized correctly.
You are correct that a bolted terminal introduces another possible point of failure. All of which points to the larger issue: It's a very poor decision to splice a wire in the first place. That is why it should never be done except in the event the wire simply cannot be replaced, or in the case that you are making load connections when the manufacturer gives you wire leads with no connector. Think twice about any connection where you have to sacrifice some of your wire length to make another connection.
Bolted terminals done properly work very well, which is why this is the method used for electrical gear drawing hundreds of amps.
Nobody's saying you can't use a butt splice if you like them. Use a wire nut for that matter. At least you can access a test point with a wire nut to determine whether you have insulation failure somewhere along the run, a bad connection, or a faulty component. None of which you can do with a butt splice short of removing the butt splice.
Last edited by ShoalFinder; 01-10-2013 at 02:42 PM.