User: PSX, Location: Utah
Asked on: Wednesday, February 12, 2025 at 9:59 pm EST
Answered on: Thursday, March 6, 2025 at 8:35 am EST
Question: Hello,I was recently failed on an inspection because the inspector said that I had to deal with the possibility of insect mitigation because the soffit was damaged where the mast enters the attic. It is an older home and it has mesh for a heat vent on the soffit. I siliconed around the pipe, but he said there was no silicone. It was raining so maybe that was true because it washed away, but I'm not sure. Is there anything in the code regarding this? He claims there is, but hasn't shown me any proof and I can't find any. The other thing he faulted me on was that my #6 solid copper wire that went to the grounding electrodes needed to be in pipe. I had secured it using quarter inch straps to the brick, but it went into the earth, not concrete. I am aware that you're supposed to protect your wire from physical damage when it is placed in concrete but haven't heard anything about dirt. Is there anything in the code about this, also?NOTE: this is the report belowPermanent PowerReport
Okay, let's break down these inspection issues and see what the code says (or doesn't say) about them. Keep in mind that interpretations of code can vary, and local amendments can exist, so it's always best to confirm directly with your local permitting office or a certified electrical inspector in your area.1. Soffit Damage and Insect Mitigation around the Mast (Service Entrance Conductor) The Issue
Damaged soffit allowing potential insect entry where the mast (service entrance conductor conduit) penetrates the attic.
Code References
There isn't a specific NEC (National Electrical Code) article that explicitly states "seal around the mast at the soffit to prevent insects." However, the inspector is likely invoking broader principles related to safety and building integrity.
NEC 110.12 Mechanical Execution of Work
This section requires electrical installations to be performed in a neat and workmanlike manner. A large gap around a service mast could be argued as a violation of this, as it's not considered neat and could lead to further damage.
Potential Building Code Implications
This is where the inspector might have more ground. Building codes often address maintaining the integrity of the building envelope. A hole allowing insect entry is a potential breach of that envelope. They may be using this as a cover.
Common Sense/Best Practices
Regardless of explicit code, it's generally good practice to seal any penetrations through the building envelope to prevent water, insect, and rodent intrusion.
Your Actions
Silicone around the pipe: This is the right idea. Rain Washing Away Silicone: Standard silicone isn't ideal for wet conditions during application.
Recommendations
Use a suitable sealant
Instead of standard silicone, use a high-quality, paintable exterior-grade sealant (like polyurethane or a sealant specifically designed for exterior use) that is rated for wet conditions. Clean the area thoroughly before application.
Inspect and Repair the Soffit
Address the underlying damage to the soffit itself. If the mesh is broken or the wood is rotting, repair or replace it.
Document Everything
Take photos of the repairs before and after.
Talk to the Inspector
Politely ask the inspector to provide the specific code section they are referencing. If they can't, and you've made a reasonable effort to seal the penetration, you may have grounds to appeal.
2. #6 Solid Copper Grounding Electrode Conductor (GEC) and Physical Protection The Issue
The inspector wants the #6 solid copper GEC, running from the grounding electrode (ground rod) to the service panel, protected in conduit even though it's buried in dirt and strapped to the brick.
Code References
NEC 250.64(B) Physical Protection
This is the key section. It states that a grounding electrode conductor exposed to physical damage shall be protected.
NEC 250.64(B) Exception
#6 copper or larger grounding electrode conductors are permitted to be run along the surface of the building construction without metal covering or protection where they are securely fastened to the construction; otherwise, they shall be protected.
Analysis
"Physical Damage"
The definition of "physical damage" is somewhat subjective. However, burying the conductor in dirt does offer some protection. Strapping it to the brick helps to keep it in place and reduces the chance of it being snagged or damaged.
The Inspector's Argument
The inspector is likely concerned that the conductor could be damaged by shovels, gardening tools, or even rodents over time. He could also be concerned that if it's close enough to the surface, someone could accidentally hit it with a lawnmower or other equipment.
Concrete is NOT in Question
You're correct that concrete is an aggressive environment for bare copper. That's why it requires specific protection if encased in concrete. However, we are not talking about this circumstance
Recommendations
Review the specific language with the inspector
The NEC states that if securely fastened to the construction, the conductor can be run exposed without metal protection. Is the inspector disputing that your straps provide sufficient secure fastening?
Provide Additional Protection
The easiest way to resolve this disagreement is to provide the protection the inspector wants. Options include:
Conduit
Run the #6 copper GEC inside PVC or metal conduit from the ground rod up to the service panel. This is the most common and generally accepted solution. Bury the conduit a reasonable depth (e.g., 6 inches) in the dirt.
Physical Barrier
If conduit is not possible, consider a physical barrier like a treated board or heavy-duty plastic sheeting placed over the conductor in the soil. This isn't ideal, but it's better than nothing.
Go Deeper
If you choose to forgo conduit, ensure the wire is buried deep enough to avoid any likely contact.
Document
Again, document everything with photos.
In Summary While there may not be a specific "insect mitigation" code requirement for the soffit penetration, it's good practice and potentially a building code issue. Address it with a quality sealant and soffit repair. The grounding electrode conductor issue is more debatable. The code allows for exposed #6 copper when securely fastened. However, the inspector has the final say. Conduit is the easiest way to resolve this.
Important Considerations Local Amendments
Your local jurisdiction may have amendments to the NEC that are stricter than the national code.
Inspector Authority
The inspector has the authority to interpret the code. While you can respectfully question their interpretation, ultimately, they have the final say unless you successfully appeal.
Safety First: Remember that the purpose of inspections is to ensure safety. Even if you disagree with the inspector, address the issues to the best of your ability.I hope this helps! Good luck getting your inspection passed. Remember to be polite and communicative with the inspector, and document everything. Flag for review