I'm not sure what the pump was for (possibly A/C condensation??) I love the use of the old pump as support for the rigid & the sealtite conduits..
The wires in pic 4 were dead at least when I put a hotstick next to them.. This strip mall has probably been around since about the 60's, & it seems no one has attempted to stay in code up here, since then! Outta sight, outta mind!