Your OP has me confused.
Is this a (2) leg 1-phase 400A/240 VAC Service that is split out just in front of the (4) OCPD?
Is this a 3-phase Service that feeds 5-jaw meters in a stack?
BTW, bonding to the water system... Is it an old metallic system?
Is it new construction?
Is Grandfathering at issue?
Are the apartments using Insta-Hots? ( Tax breaks exist in some areas for these -- in California we're seeing a lot more of them. )
Do you have to provide a Low Voltage/ Data junction bar for each abode?
Is this really just a fourplex? A rewire?
Flood damaged property?
Federally reimbursed/ assisted?
Does it consequentially have waivers/ stippulations?
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^^^^^ Would be much more important in composing a realistic bid than concern about running, say #4 THHN a dozen feet to a Water Service Entrance Pipe.
