What Is a Weatherhead?
A weatherhead is the curved cap installed where overhead electrical service wires enter a home or business. Known also as a service head or entrance cap, this device keeps rain from running along the wires into the conduit. It is shaped like a hood and points downward so water drips away.
Without this cap, even a drizzle could sneak into your electrical system. That mix of water and electricity could spark trouble—literally.
Why a Service Head Is Important
The National Electrical Code (NEC) requires a service entrance cap on overhead connections. This is because water and electricity do not mix. As a result, the service head prevents rust, short circuits, and fire risks.
In addition, the entrance cap protects against insects, leaves, and other outdoor debris. Think of it as a guard standing watch at your rooftop power gate.
Installing and Maintaining a Weatherhead
Only a licensed electrician should install or replace a weatherhead. It must be mounted at the correct height, usually above 10 feet.
Over time, the cap can crack from sun or storm damage. Therefore, inspect it yearly and after severe weather. For example, if you see cracks or rust, it is time for a replacement.
In addition, sealing the conduit beneath the entrance cap improves protection. Together, they form a shield against moisture—like an umbrella and rain boots for your wiring.
Homeowner Tips for Service Entrance Caps
Look up once in a while. A simple glance at your weatherhead can help you spot damage early. However, avoid climbing ladders or touching wires yourself. Call an electrician instead.
Also, remember that underground service does not require a weatherhead. That’s one less part to worry about if your home uses buried conduit.
Conclusion
The weatherhead may be small, but it plays a huge role in electrical safety. Need help with installation or repair? Call OurElectrician at 405-848-6877. The Switch is On to Safety.
FAQ
Do underground services need a weatherhead?
No. Underground service lines run in conduit and do not need a weatherhead.
When should I replace my entrance cap?
Replace it if you see cracks, rust, or loose fittings. Annual inspections are recommended.