In a multi-family dwelling, the sub-panel is recessed in the wall. A water line has been run below the panel, through the framing members. This is a code violation, but how many of you think this is an issue? The dedicated space is for future expansion. I don't feel there will be any in this type of building.
Although art. 110.26(F)(1)(b) would permit it if it were above the panel.but not below it.I think it would have to be a judgement call by the AHJ on whether to allow it to remain.After all,the plumber could turn an ell up,run the pipe through a sleeve across the top of the panel,and then ell back down,which would make it code compliant but certainly be more in the way of the electrical.If I were the electrician I'd prefer below the subpanel