Yes, snaking MC cable horizontally through an existing metal stud wall can be difficult, primarily due to the following factors: Stud Knockouts

The knockouts in metal studs can be small, often offset, and sometimes have sharp edges. Fishing MC cable through these knockouts requires careful manipulation.

Insulation

Existing walls are often insulated, which can block your path and make it harder to see and guide the cable.

Obstructions

Other wiring, plumbing, or HVAC components might be present within the wall cavity, further obstructing your progress.

Length of Run

The longer the horizontal run, the more difficult it becomes to maneuver the cable through multiple studs and around obstacles.

MC Cable Stiffness

MC cable, while flexible, is not as easily bendable as NM cable (Romex), making it harder to snake through tight spaces.Here are some tips to make it easier:

Use Fish Tape or Fish Rods

These tools are essential for guiding the cable through the wall cavity.

Lubricate the Cable

Applying wire lubricant to the MC cable can reduce friction and make it easier to slide through knockouts and around obstacles.

Pre-Plan Your Route

If possible, inspect the wall cavity with a borescope or by removing an access panel to identify potential obstructions and plan the best route.

Work with an Assistant

Having someone help feed and guide the cable from the opposite end can make the process much easier.

Consider Cutting Larger Openings (If Allowed)

In some cases, you might be able to enlarge the knockouts or cut small access holes to make the job easier. However, be sure to comply with local codes and properly repair any openings you create.

Use MC Connectors with Swivels

Some MC connectors have swivel features that allow you to rotate the connector after it's been installed, making it easier to align the cable.

Alternative Routes

If snaking the cable horizontally proves too difficult, consider running the cable vertically along the studs and then horizontally at the desired height.*

Check Building Codes: Be aware of local building codes regarding the installation of MC cable in metal stud walls. This may include requirements for supporting the cable at certain intervals.Given the potential difficulties, it's often a time-consuming and frustrating task, especially for longer runs. If you're not comfortable working with electrical wiring or navigating tight spaces, it's best to hire a qualified electrician. They have the tools, experience, and knowledge to do the job safely and efficiently. Flag for review