Please provide the attached draft! I need to see the plan to give you any meaningful feedback.However, I can give you some general considerations based on the concept of interconnecting buildings instead of home runs. These are potential problems and things you need to carefully consider

General Considerations & Potential Problems with Building-to-Building Interconnections (Instead of Home Runs):
Grounding and Bonding

This is the most critical aspect. Different buildings likely have different ground potentials. Improper grounding can lead to:

Ground Loops

Current flowing through the grounding conductors. This can cause noise and interference on your signals, and even pose a fire hazard.

Equipment Damage

Voltage differences can damage sensitive electronic equipment.

Safety Hazards

Creates a shock hazard for personnel.

Solution

Properly sized and installed grounding conductors are essential. You likely need a professionally engineered grounding and bonding plan. Consider using fiber optic cables to isolate equipment in different buildings if possible.

Distance Limitations

The distance between buildings might exceed the limitations of your chosen communication protocols (e.g., Ethernet, RS-485). You might need repeaters, media converters, or fiber optic solutions to overcome these distance limitations.

Network Topology

How are you planning to route the signals? A ring topology might be more fault-tolerant than a daisy-chain, but it can be more complex to implement. Consider redundancy in your network design.

Voltage Drop

For power circuits, the voltage drop between buildings needs to be calculated and addressed. You might need larger conductors to compensate for voltage drop over long distances.

Lightning Protection

Buildings may have different lightning protection zones. Ensure your interconnection paths are adequately protected against lightning strikes. Consider surge protection devices (SPDs) at each building entry point.

Security

Interconnecting buildings increases the potential attack surface. Implement appropriate security measures to protect your network from unauthorized access.

Physical Security

How are the cables protected between buildings? Are they underground in conduit? Overhead? Ensure the cables are protected from physical damage, weather, and vandalism.

Permitting and Codes

Local building codes and regulations may have specific requirements for interconnecting buildings. Consult with your local authorities to ensure compliance.

Maintenance and Troubleshooting

Interconnecting buildings can make maintenance and troubleshooting more complex. Develop clear documentation and procedures for identifying and resolving problems.

Scalability

Consider the future scalability of your system. Will your chosen interconnection method be able to support future expansion?

Power Supply Coordination

If power is being shared between buildings, coordinate the power supplies to prevent overloads or voltage fluctuations.

Potential Interference

If you are running low voltage control signals with power wiring, ensure proper separation and shielding. Consider using shielded cable for low voltage signals.

Future Modification

Make sure your plan allows for future modifications with minimal impact.

What information should be in the "attached" plan?

Ideally, the plan should include: A clear diagram showing the location of each building and the proposed interconnection paths. A list of the equipment being interconnected in each building. The type of cable being used for each interconnection (e.g., Ethernet cable, fiber optic cable, power cable). The communication protocols being used (e.g., Ethernet, RS-485, Modbus). A grounding and bonding diagram. Details about the surge protection devices being used. Calculations for voltage drop and current carrying capacity (for power circuits). Details about the physical protection of the cables. A risk assessment of potential problems and mitigation strategies.Once you provide the drawing, I can give you more specific feedback. Flag for review