I am adding a sub-panel in a residence. The existing panelboard(100A 240V) has no spares and I need a circuit for a sump pump(20A 120V). My question is can I remove two circuits from the existing panelboard and insert a two pole 100A to feed the sub panel. Since the two circuits I will be removing are in EMT conduit with other circuits I would like to splice them in the existing panel and pick up the OCPD in the new sub-panel. The practice in my jurisdiction is to never splice in a cabinet containing a panelboard but I can't find a code reference that prohibits this. Where I am working the 2005 NEC is used. Can anyone shed some light on this. Is the no splicing rule in a panel board real or myth?:?