You're right to be skeptical. While approved in-wall splice kits for NM cable are a code-compliant option in some situations, they definitely have some drawbacks and aren't always the best choice. Here's a breakdown of my thoughts

Pros:
Code Compliant (Usually)

The primary advantage is that if the kit is listed and approved for in-wall splicing, it theoretically meets code requirements. This is crucial for safety and insurance purposes. (Make sure it is

Listed and Approved for this application!) Accessibility Not Required

The biggest selling point is that these kits eliminate the need for an accessible junction box. This can be very helpful in situations where running new wires or fishing wires to an existing box is extremely difficult or impossible.

Relatively Easy to Install (Sometimes)

Depending on the specific kit, the installation can be quicker than running new wiring. They often involve insulated, crimp-on connectors or twist-on connectors inside an enclosure.

Cons (and why you might think they look "cheesy")



Reliability Concerns

This is the biggest worry. Splicing is generally considered a point of potential failure in an electrical system. Even a properly installed splice is inherently less reliable than a continuous wire run.

Crimp Connections

Many kits rely on crimp connections. While high-quality crimps can be reliable, a poor crimp (due to incorrect tools, technique, or wire gauge) can lead to loose connections, arcing, and even fire.

Wire Nut Connections

Kits using wire nuts can also be problematic if not tightened correctly. The connection can loosen over time, especially with thermal cycling.

Potential for Future Issues

Electrical problems can arise years down the road. With an in-wall splice, troubleshooting becomes more complex. It can be difficult to diagnose whether the problem lies in the splice itself or elsewhere in the circuit.

Quality Variation

The quality of these kits can vary significantly. Some are well-designed with robust connectors and enclosures, while others feel flimsy and unreliable.

This is the main reason why they often seem "cheesy." Pay close attention to reviews and certification marks. A good brand name and UL listing will give you more confidence. Limitations

They are not a universal solution. They are typically limited to certain wire gauges and types (e.g., NM cable). They are usually NOT permitted in damp or wet locations. And, the National Electric Code (NEC) generally frowns upon excessive splicing.

Code Compliance Varies by Jurisdiction

Even though a kit is listed, local electrical inspectors may have reservations or even outright prohibit their use.

Always check with your local building department or inspector before using one. Added Resistance

Every connection, including a splice, introduces a small amount of resistance. In most cases, this is negligible. However, in long runs or with heavy loads, the added resistance can contribute to voltage drop and heat generation.

Expense

In some cases, the cost of a quality splice kit can be comparable to the cost of simply replacing the section of wire or running a new circuit.

When Might They Be Appropriate? Truly Impossible to Run New Wire

When running new wire through existing walls is prohibitively difficult or destructive, and the only alternative is to leave the circuit broken.

Minor Repairs

For small, isolated damage to a cable where replacing the entire run is impractical.

Following Manufacturer's Instructions Exactly

The success of these kits relies heavily on proper installation. Follow the manufacturer's instructions to the letter. Use the correct tools, wire strippers, and crimpers.

Alternatives to Consider



Running New Wire

This is always the best solution if feasible. A continuous run of wire is the most reliable and easiest to troubleshoot.

Fishing Wire to an Accessible Junction Box

This is the preferred method if running a completely new wire is not possible. The junction box must be accessible and properly installed.

Using a Conduit System

If you are frequently running or changing wiring, consider installing conduit. This makes future wiring changes much easier.

Recommendations


Prioritize running new wire or installing an accessible junction box whenever possible.2. Consult with a qualified electrician

Get their opinion on the best solution for your specific situation. They can assess the risks and benefits of using an in-wall splice kit versus other options.3.

Check with your local building department or inspector

Confirm that the kit is acceptable under local codes and regulations.4.

If you choose to use a kit, select a high-quality, listed, and approved product from a reputable manufacturer. Read reviews and compare different options.5. Follow the manufacturer's instructions exactly. Use the correct tools and techniques.6. Take your time and be meticulous with the installation. Don't cut corners.

In summary: In-wall splice kits can be a code-compliant option in very specific circumstances. However, they should be used with caution and only after carefully considering the alternatives. They definitely have the potential to be "cheesy" if you choose a cheap kit or don't install it properly. Always prioritize reliability and safety. When in doubt, consult with a qualified electrician. Flag for review