Plastic new work boxes are commonly used with non-metallic cable wiring. They offer quick installation and are good for most residential applications. These provide better grounding and bonding capabilities. In this guide, we'll break down the 12 main types of distribution boxes in a way that's easy to understand. We'll chat about what each one does, where it shines, and then dive into how to choose the perfect box for your needs. Plus, we'll sprinkle in some practical tips to make sure you're not. A well-chosen and properly installed distribution box can prevent electrical hazards, reduce downtime, and ensure your electrical system operates smoothly for years to come. Main Distribution Board (MDB) 2.