You're interpreting NEC 760.130(B)(2) correctly. The requirement for metal raceway (or equivalent protection) applies specifically when the fire alarm cable is passing through a floor or wall within 7 feet of the finished floor. It doesn't explicitly state that it's required for the entire run if the cable is simply running along the wall within that height.Here's a breakdown and why your interpretation is valid: NEC 760.130(B)(2)

This section deals with protection against physical damage. The key phrase is "passing through." The intent is to protect the cable where it's most vulnerable – where it penetrates a surface.

Running Along the Wall

If the cable is running along the surface of the wall, and not physically penetrating it within that 7-foot zone, the code doesn't explicitly mandate metal raceway. You could potentially use other methods of protection against physical damage, like:

Physical Protection

Using cable guards, or other approved methods of physical protection.

Secure Mounting

Properly securing the cable to the wall to prevent it from being easily snagged or damaged.

Why Your Practice is Still Good

Even though the NEC might not strictly require it in your scenario, using metal conduit along the wall is

best practice. It offers superior physical protection and looks more professional.

Important Considerations



Local Amendments

Always check with your local Authority Having Jurisdiction (AHJ). Many jurisdictions have stricter requirements than the NEC. They might require conduit for all fire alarm wiring within a certain height, regardless of whether it passes through a wall.

Type of Wiring

The type of fire alarm circuit matters (Power-limited vs. Non-Power-limited). Power-limited fire alarm (PLFA) circuits generally have more lenient installation requirements than non-power-limited fire alarm (NPLFA) circuits. However, physical protection is still a significant concern.

Manufacturer's Instructions

Consult the cable manufacturer's instructions. They might specify certain installation requirements.

Risk Assessment

Consider the environment. Is the area prone to physical damage (e.g., a warehouse)? If so, even if the code doesn't require it, conduit might be a prudent choice.

In summary

Your reading of the NEC is accurate. 760.130(B)(2) focuses on protection when

passing through walls or floors. Running along* the wall within 7 feet doesn't necessarily require metal raceway according to the wording of that specific section, BUT... using metal conduit remains a VERY good practice. Always verify with your local AHJ for any local amendments or interpretations. They have the final say. Flag for review