You're right, NEC 400.13 generally prohibits splices in flexible cords and cables. However, there are exceptions and nuances that might apply to your situation, or at least help you make a stronger argument to the plan reviewer.Here's a breakdown of the issue and potential counter-arguments, considering the 2023 NEC

Understanding the Plan Reviewer's Position:

The plan reviewer is likely interpreting your junction box as creating a "splice" in the SO cord. They see the incoming SO cord from inside the pole, and then the outgoing SO cords to the fixtures, all connected within the box. The reviewer is likely concerned with the mechanical integrity and strain relief of such a connection, especially in an outdoor environment with potential vibration from wind or impacts.

Why 400.13 Exists

The prohibition on splices in flexible cords is primarily for safety:

Mechanical Strength

Splices, especially those made with wire nuts or similar methods, can weaken the cord and are vulnerable to pulling or strain, potentially leading to failure.

Insulation Integrity

Splices can compromise the cord's insulation, increasing the risk of shock hazards.

Environmental Exposure

Outdoor splices are susceptible to moisture and corrosion, further degrading the connection.

Potential Arguments & Solutions (with NEC references)


The Junction Box as an Equipment Enclosure



Argument

You could argue that the junction box is not creating a "splice" in the true sense. It's simply a point where you're terminating the incoming SO cord and connecting it to the fixture's SO cords within an equipment enclosure.



Support

This relies on the specific definition of a "splice" and how the NEC differentiates between a splice and a termination within an approved enclosure. Look to Article 100 (Definitions) for clarity. In common use "splice" and "termination" are used somewhat interchangeably.

Important

This argument only works if the junction box is listed and approved for the purpose, and provides proper strain relief and protection for all the conductors.2.

Factory Assembled Equipment



Argument

If the fixtures are supplied with SO cords intended to be terminated within a junction box (as part of their intended installation), you could argue that this is essentially factory-assembled equipment.

Support

This would require demonstrating that the fixture manufacturer's installation instructions clearly specify this type of connection. If the manufacturer provides installation instructions that require the junction box arrangement, it lends significant weight to your argument. This approach is also supported if the fixture/cross arm/junction box is UL listed as an assembly.

NEC Relevant Sections

Article 110.3(B) regarding following listing and labeling instructions.
3.

Class I, Division 2 Locations (If Applicable)



Argument

If the location is classified as a Class I, Division 2 hazardous location (unlikely for sports lighting, but worth considering), there are specific allowances for splices in flexible cords using approved methods.

NEC Relevant Sections

NEC Article 501.140(B)4.

Use of Cord Connectors, Not Splices



Solution

Instead of using wire nuts or similar splicing methods within the junction box, use cord connectors specifically designed for terminating flexible cords. These provide secure mechanical connections, strain relief, and maintain insulation integrity.

NEC Relevant Sections

400.10(A) and 400.10(B) covers that flexible cords must be connected to devices and to fittings so that strain relief is provided to prevent pull from being directly transmitted to joints or terminals5.

Seek an Official Interpretation



Action

If you're unable to resolve the issue with the plan reviewer, consider requesting an official interpretation of the NEC from your local authority having jurisdiction (AHJ). This provides a definitive ruling on how the code applies to your specific situation.

Best Practices & Considerations



Junction Box Selection

Choose a junction box that is rated for outdoor use (NEMA 3R or higher) and sized appropriately for the number of conductors and connections.

Strain Relief

Proper strain relief is critical. Use cord grips or other approved methods to prevent strain on the connections within the junction box.

Documentation

Have the fixture manufacturer's installation instructions available to demonstrate the intended method of connection.

Communication

Talk to the plan reviewer. Understand their concerns and be prepared to explain your design and how it meets code requirements. Sometimes, a simple conversation can clarify the situation.

Example Conversation with the Plan Reviewer

"I understand your concern regarding splices in flexible cords. However, I believe the junction box, as designed, serves as an equipment enclosure, not a splice. The SO cord from inside the pole will be terminated within the box using [describe the type of connector], which provides secure mechanical connection and strain relief. The fixture's SO cords are similarly terminated within the box. This arrangement is consistent with the fixture manufacturer's installation instructions [if applicable], and ensures a safe and compliant installation."

In summary: Focus on showing that your junction box is a termination point within an approved enclosure rather than a splice. Emphasize proper strain relief, the use of appropriate connectors, and compliance with the fixture manufacturer's instructions. Good luck! Flag for review