Originally Posted By: fbartlo
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Every now & then I run into splices in service panels, especially splicing 2 incoming circuits together in older panels that have run out of available spaces for additional fuses or breakers, or extending wires to reach the terminals in an updated panel that is much larger and/or installed lower on the wall than the former panel.
In most cases these splices are done properly, with appropriate wire connectors.
It seems to me this practice would be preferable to double-tapping a fuse or breaker terminal, but would not be advisable in an overcrowded panel, in which case the strain on the wires could pull such a splice apart eventually.
What particular codes apply to such a practice, is it a judgment call (i.e., inappropriate for "overcrowded" panels) or is it generally frowned-upon?
And of so, why, aside from cases such as I mentioned above?