No, it is generally not code compliant to combine A/C refrigerant lines and the A/C circuit power cable/conduit exiting the same hole, at least not without specific provisions and careful consideration of applicable codes. Here's a breakdown of why and what you need to consider

Reasons for Separation:
Different Systems/Trades

Electrical and mechanical systems are typically installed and maintained by different trades. Mixing them in this way can blur responsibility and create confusion during maintenance or repairs.

Potential for Damage

Refrigerant lines can sweat or leak. This moisture could damage electrical conductors, potentially leading to shorts, corrosion, or electrical hazards. Conversely, the power cable could cause abrasion or wear on the refrigerant lines.

Code Requirements

While there might not be a specific blanket prohibition against this exact scenario in every code cycle, the intent of the codes is to maintain separation of systems and prevent the introduction of hazards.

Key Considerations and Potential Code Violations



NEC (National Electrical Code)

The NEC focuses on the safety of electrical installations. While it doesn't explicitly say "no refrigerant lines with power cables in the same hole," it does emphasize proper cable support, protection from damage, and preventing the ingress of moisture. You would need to demonstrate that your installation meets those requirements, which can be difficult if the refrigerant lines leak/sweat.

IMC (International Mechanical Code)

The IMC governs mechanical systems, including HVAC. It likely has requirements for protecting refrigerant lines from damage and ensuring proper drainage of condensate.

Manufacturer's Instructions

The instructions for the A/C unit and the electrical components (cable, conduit, fittings) may have specific requirements regarding clearances and separation.

Local Codes

Local building codes and ordinances often have amendments or additions to the national codes. Check with your local building department for any specific rules in your area.

Workmanship

The installation must be done in a neat and workmanlike manner (NEC 110.12). Jamming refrigerant lines and power cables through the same hole looks unprofessional and can raise red flags with inspectors.

Permissible Scenarios (Potentially, with VERY Careful Planning and Inspection)

While generally not recommended, there might be very specific situations where this could be permitted if all of the following conditions are met:1.

Approval from the AHJ (Authority Having Jurisdiction)

This is the most important step. You must get written approval from your local building inspector or code official before proceeding.2.

Clear Separation and Protection

The power cable/conduit and refrigerant lines must be physically separated within the hole with a durable, non-conductive barrier. The lines and cables should NOT be touching each other.3.

Moisture Protection

The electrical components (cable, conduit, connectors) must be rated for wet locations and be installed in a way that prevents moisture from reaching the conductors, even if the refrigerant lines leak. Consider using a sealant that is compatible with refrigerant and electrical components.4.

Adequate Hole Size

The hole must be large enough to accommodate both the refrigerant lines and the power cable/conduit without causing any strain or damage to either system.5.

Proper Support

The refrigerant lines and power cable/conduit must be properly supported both inside and outside the hole to prevent them from sagging or rubbing against each other.6.

Identification

Clearly label the refrigerant lines and the electrical conduit/cable.7.

Documented Justification

You would need to provide a well-documented justification for combining the lines and cables in this way, explaining why it is necessary and how you are mitigating the potential risks.

Best Practice

The best practice is to

keep the refrigerant lines and power cables separate. Drill separate holes, use appropriate fittings and sealants, and follow the manufacturer's instructions for each system. This minimizes the risk of problems and ensures code compliance.

In summary: It is highly unlikely that combining refrigerant lines and power cables/conduit in the same hole will be code compliant without significant precautions, AHJ approval, and a compelling reason for doing so. It's almost always better to keep them separate. Flag for review