You're right, there are several potential issues here that warrant a closer look. Let's break them down

1. Load Calculation vs. 600A Panel Capacity:
This is the biggest concern. It's impossible to definitively say if the 600A panel is adequate without doing a full load calculation. You must calculate the total connected load (lighting, receptacles, HVAC, motors, etc.), apply any applicable demand factors (based on occupancy type, appliance diversity, etc. – NEC Article 220), and compare the result to the panel's 600A capacity. Look for common errors in load calculations

Forgetting to include HVAC loads, underestimating receptacle loads (especially in commercial spaces), neglecting motor loads (including starting currents), and misapplying demand factors.

2. Riser Diagram vs. Panel Schedules



Discrepancies are a major red flag. The sizes of the panels and the OCPD ratings feeding them must be consistent between the riser diagram and the individual panel schedules. For example: If the riser shows a 225A breaker feeding Panel "LP," the panel schedule for "LP" must show a main breaker (or main lugs only rated at 225A or higher) fed from a 225A breaker on the upstream panel. You need to verify that the wire sizes on the riser diagrams correspond to the OCPD.

Why these discrepancies are important



Safety

Incorrect OCPD sizing can lead to overloading, overheating, and potentially fires.

Code Compliance

The NEC (National Electrical Code) mandates proper sizing of conductors and overcurrent protection.

Functionality

An undersized panel will trip breakers frequently, causing disruptions and potentially damaging equipment.

How to Investigate Further


Obtain a complete set of electrical plans and specifications. You need to see the load calculations, detailed panel schedules, riser diagrams, and any specific notes regarding the installation.2. Perform a thorough load calculation. This is the most critical step. Use the connected loads from the plans, apply the appropriate demand factors from the NEC, and compare the result to the panel's capacity.3. Carefully review the riser diagram and panel schedules. Look for inconsistencies in breaker sizes, conductor sizes, and panel ratings. Verify that the feeder conductors are adequately sized for the loads they serve.4. Check for non-coincident loads. Can certain loads never operate at the same time? If so, this can be factored into the load calculation.5. Consider future expansion. Is the electrical system designed to accommodate future load growth?In conclusion, the fact that you have concerns about the capacity of the 600A panel and inconsistencies between the riser diagram and panel schedules is very valid. A thorough review and load calculation are essential to ensure the safety and functionality of the electrical system. Flag for review