Final answer:
An ammeter is not part of the classification of an incandescent lamp.
Step-by-step explanation:
An incandescent lamp consists of a tungsten filament enclosed in a partially evacuated glass envelope. The filament is connected to a screw base, and current flows through the filament, causing it to glow and produce light. The classification of an incandescent lamp includes the filament, the glass envelope, and the screw base, but an ammeter is not part of the classification. An ammeter is a device used to measure electric current and is not an integral component of an incandescent lamp.