Okay, let's break down the Los Angeles Department of Building and Safety (LADBS) stance on this, and how to address your inspector's concern regarding the vacuum and compressed air lines near your disconnects.

Understanding the Inspector's Concern & Relevant Code Sections

While you're correct that disconnects themselves don't explicitly have sections dedicated to "protection from physical damage," the inspector is likely interpreting the installation based on broader electrical safety and working clearance rules. Here's the likely rationale: Working Space Obstructions (NEC 110.26)

This is the primary section they are concerned with. NEC 110.26(A) requires working space to be clear and unobstructed. While it focuses on access for examination, adjustment, servicing, and maintenance, the spirit of this rule is to ensure a safe working environment.

Equipment Space

Even if the vacuum and compressed air lines are not directly in front of the disconnects, they could be considered encroaching on the required working space around the disconnects. If a worker needs to open the disconnect and perform maintenance, the lines could become an obstruction or a potential hazard.

Local Amendments

Los Angeles (and California in general) often have amendments to the National Electrical Code (NEC). The inspector is likely applying a stricter interpretation or referencing a local amendment that further clarifies what constitutes an obstruction within working space.

Good Workmanship

Beyond specific code, inspectors can cite "good workmanship" as justification for rejecting work that they deem unsafe or improperly installed. Having lines directly above or below electrical equipment could be seen as poor practice.

Why the Inspector May Focus on the Location of the Lines Potential for Damage/Leaks

The inspector might be concerned about the potential for the vacuum or compressed air lines to leak or burst, potentially spraying water, oil, or other contaminants onto the electrical equipment. This could create a shock hazard, cause corrosion, or damage the disconnects.

Impeded Access

Even if the lines don't directly block the disconnect handle, they might make it difficult to maneuver tools, equipment, or oneself safely while working on the disconnects.

Safety in Emergency

In an emergency situation where the disconnect needs to be operated quickly, the lines could be an impediment.

How to Address the Issue1. Communicate with the Inspector

The most important step is to have a direct conversation with the inspector. Ask for specific code sections that they are citing. Understanding their reasoning will help you find the best solution. Be polite and respectful; the goal is to find a solution that satisfies them and ensures a safe installation.2.

Review Plans and Permits

Double-check your approved plans and permits. Were these lines shown in relation to the disconnects? If they were approved as shown, you have a stronger argument that the installation is compliant.3.

Possible Solutions

Based on the inspector's concerns and the specific layout of the room, here are some potential solutions:

Relocate the Lines

This is the most straightforward solution, though it might be the most expensive and time-consuming. Move the vacuum and compressed air lines so they are completely outside the working space defined by NEC 110.26(A). Consider running them along the ceiling or wall, higher or lower than the disconnects, and far enough away to not be considered an obstruction.

Install Physical Barriers

Enclose or shield the disconnects with a physical barrier (e.g., a metal enclosure, a shield) to protect them from potential leaks or damage from the lines. This may require ventilation to prevent overheating.

Guards for the Lines

Protect the vacuum and compressed air lines with guards or sleeves to prevent damage and contain any potential leaks.

Labeling

Clearly label the disconnects and the lines with warnings about the proximity of electrical equipment and the potential hazards.

Enclosures

Consider putting the disconnects in NEMA rated enclosures that are rated for the environment if there is a danger of moisture or other contaminants from the lines.4.

Documentation

Take detailed photos of the existing installation. Document all communication with the inspector. If you make any changes, document those as well.5.

Escalation (If Necessary)

If you're unable to reach a satisfactory resolution with the inspector, you have the right to appeal their decision to a higher authority within the LADBS. Find out the chain of command and follow the proper procedures for filing an appeal.

Important Considerations for LA Specifics



LADBS Amendments

Get a copy of the current LADBS amendments to the California Electrical Code (CEC). These amendments will clarify any local rules that go beyond the NEC. You can usually find these on the LADBS website.

Consult a Local Expert

If you are still struggling, consider consulting with a licensed electrical engineer or a master electrician familiar with LADBS regulations. They can provide expert advice and help you navigate the inspection process.

In summary

This issue revolves around ensuring a safe working environment around the electrical disconnects. Communicate clearly with the inspector, understand their specific concerns, and explore the solutions above to find a compliant and safe installation.

Disclaimer: I am an AI chatbot and cannot provide legal or professional electrical advice. This information is for general guidance only. Always consult with qualified professionals and refer to the applicable codes and regulations for your specific project. Flag for review