Electrical boxes generally fall into two main categories: new work (for new construction) and old work (for existing walls). Within these, you'll find single-gang, double-gang, and adaptable boxes, each serving different purposes for housing wiring and devices. +1

A single-gang blue box is typically used when you can secure it to a wall stud. A gray box, often with nubs on the back, is designed for mounting in walls without studs, as these nubs grip the drywall.

The term 'gang' refers to the number of devices, such as outlets or switches, that can fit side-by-side in a single electrical box. A single-gang box holds one device, a double-gang holds two, and so on.

Yes, plastic boxes are generally less expensive but can be less durable. Metal boxes offer more robustness. The choice often depends on the specific application and local electrical codes.

Adaptable boxes are versatile electrical enclosures used in installations to safely house wiring, connections, and electrical devices, providing flexibility for various wiring configurations.

For existing walls, 'old work' boxes are used. These often have mounting wings or clips that secure the box to the drywall after cutting a hole for it. Some types can slide up against a stud for added support. +1

Both Bakelite and PVC are used for surface mount boxes. In comparative tests, PVC boxes have shown advantages in drilling and knockout functionality. The aesthetic appeal can also be a factor in choosing between them.

No, it's crucial to use the correct type of electrical box for the job, considering factors like the number of devices, the type of wiring, and whether it's new construction or an existing wall. Always follow local electrical codes.

Distribution boxes, often called smart panels or enclosures, are used in electrical systems to safely distribute power to various circuits. Modern versions offer smart features for enhanced safety and management. +2

While many basic box types are used in both, commercial installations might require more robust or specialized enclosures for higher power loads and specific code requirements. Journeyman and master electricians are familiar with these distinctions.