The answer to 'types of junction box' is that there are several common types of junction boxes used in residential and commercial electrical systems. The most common types include metal electrical boxes, plastic electrical boxes, and handy boxes.
Metal electrical boxes are the most durable and commonly used junction boxes. They are made of galvanized steel or aluminum and are suitable for both indoor and outdoor use. Plastic electrical boxes are a more lightweight and cost-effective option, often used in residential applications. Handy boxes are smaller, compact junction boxes typically used for low-voltage wiring or in tight spaces.