When selecting a fiber optic splice closure, one key question often comes up:
Should I choose an outdoor (aerial) type or an underground type?
The answer depends on your application.
Outdoor (Aerial) Splice Closures
These are typically used for:
- Pole-mounted installations
- Overhead power lines
Key features include:
- Lightweight design
- UV resistance
- Easy installation at height
They are designed to handle wind, sunlight, and temperature changes.
Underground Splice Closures
Used for:
- Direct burial
- Duct installations
These closures focus more on:
- Strong sealing
- High pressure resistance
- Protection against water and soil
Simply put, underground environments are harsher than they look.
Key Differences
Let's make it simple:
- Outdoor → focus on weather resistance and ease of installation
- Underground → focus on sealing and structural strength
If you mix them up, problems will follow.
I once saw an aerial closure used in an underground project. It worked fine at first-but after heavy rain, water intrusion caused major issues.
How to Choose?
Ask yourself three questions:
- Where will it be installed?
- What environmental risks exist?
- How long should it last without maintenance?
Answering these will guide your decision.
Final Thoughts
There is no "one-size-fits-all" solution.
Choosing between outdoor and underground closures is about:
- Matching the environment
- Understanding risks
- Planning for long-term performance
Still unsure which type is right for your project?
Tell us your installation scenario-we'll help you choose the most suitable option.