You're right to be concerned about the NEC requirements for markings and the implications of stripping the cable sheath. Here's a breakdown of the issues and potential solutions

The Problem: Loss of Marking and NEC Compliance
NEC Marking Requirements

The NEC generally requires conductors and cables to be marked with information like voltage rating, ampacity, and type. When you strip the overall jacket of your CL3P-OF cable, you lose this critical marking for the individual insulated conductors.

NEC 310.11 Identification of Conductors

This section covers requirements for conductor identification. It states that conductors must be marked.

Unmarked Conductors and Inspection

An inspector is likely to flag unmarked conductors, especially if they are carrying power, as they cannot verify the conductor's suitability for the application.

Considerations and Potential Solutions


Factory Markings on Individual Conductors (Best Case)



Carefully inspect the individual insulated conductors before stripping the cable. Do they have markings printed directly on the insulation itself? Some composite cables will have each conductor clearly marked with its gauge, voltage rating, and type. If they do, you might be okay, but proceed with caution and document everything. This is a crucial first step. Documentation

Even with markings, meticulously document the cable type, conductor specifications, and your reasoning for using the conductors in your network design. This will be essential if an inspector questions the installation.2.

Conduit or Raceway



Advantages

This is often the safest and most code-compliant solution. After stripping the jacket, immediately run the conductors and fiber through a conduit or raceway to the appropriate cabinets.

Benefits

Protects the conductors from physical damage. Provides a dedicated pathway. Allows you to label the conduit/raceway with the cable information at the point where the conductors enter, effectively re-establishing the identification. Helps maintain separation of low-voltage and power wiring if necessary.

NEC Considerations

Ensure the conduit and fittings are appropriate for the environment and application. Use appropriate bushings to protect the conductor insulation.3.

Dedicated Cable Tray

Similar to conduit, a dedicated cable tray section could also work, especially if you need to route multiple cables. Ensure it's properly labeled.4.

Re-marking (Potentially Problematic)

While technically possible (using specialized conductor marking equipment), re-marking is generally not recommended unless you have explicit approval from the AHJ (Authority Having Jurisdiction). Re-marking must accurately reflect the original cable and conductor specifications. You need to be able to reliably and permanently mark the conductors. The AHJ might require proof that the marking method is equivalent to the original marking. This can be a very expensive and time-consuming option, so it's generally not practical for a small number of conductors.5.

Clarification with the Authority Having Jurisdiction (AHJ)

Before proceeding with any solution, especially if you're considering anything other than conduit, it's highly recommended to discuss your situation with the local electrical inspector (AHJ). Explain your design, the cable specifications, and your proposed solution. They can provide specific guidance and approve or disapprove your approach. This is the most important step to avoid later problems.

Important Considerations for Class 2 Power Sources



Class 2 Circuits

The NEC Article 725 covers Class 2 and Class 3 circuits. Class 2 power sources are limited in voltage and current, making them inherently safer.

Cable Listing and Suitability

Even with a Class 2 power source, you must ensure that the insulated conductors are suitable for the voltage and current of the Class 2 circuit. The cable's listing (CL3P-OF) may not automatically qualify the individual conductors for specific Class 2 applications. Refer to the cable manufacturer's data sheet and conductor specifications.

Separation from Power

Even with Class 2 power, maintaining separation from higher-voltage power circuits is generally good practice.

Example Scenario & Recommendation

Let's say you need to run a CL3P-OF cable, strip back 20 feet, connect the fiber to a network switch in Cabinet A, and connect the conductors to a Class 2 power supply in Cabinet B.1.

Inspect the Conductors

Check if the individual conductors are marked with their gauge, voltage rating, and type.2.

Best Practice: Conduit. Strip the cable sheath as close as possible to Cabinet B. Immediately run the stripped conductors and fiber through a conduit (PVC or EMT, depending on the environment) from the strip point to both cabinets. Label the conduit clearly at both ends with the CL3P-OF cable information and the destinations of the fiber and conductors. Install bushings at the conduit ends to protect the insulation.3. Alternative (If AHJ Approved)

If conduit isn't feasible and only if the AHJ approves, use a dedicated cable tray section with clear labeling at both ends and where the conductors enter/exit the tray. Ensure the conductors are properly supported and protected within the tray.

In summary

Losing the cable sheath markings is a legitimate concern. Prioritize a solution that provides clear identification and protection for the conductors. Conduit is generally the best and safest approach.

Consult with the local electrical inspector (AHJ) before proceeding. Their approval is essential.* Verify the suitability of the conductors for the Class 2 power source.By carefully considering these factors and seeking guidance from the AHJ, you can ensure a safe and code-compliant installation. Flag for review