This U.S. industry comprises establishments primarily engaged in manufacturing noncurrent-carrying wiring devices.

Cross-References. Establishments primarily engaged in--

• Manufacturing porcelain and ceramic insulators--are classified in U.S. Industry 327113, Porcelain Electrical Supply Manufacturing;
• Manufacturing current-carrying wiring devices--are classified in U.S. Industry 335931, Current-Carrying Wiring Device Manufacturing; and
• Manufacturing glass insulators--are classified in Industry 32721, Glass and Glass Product Manufacturing.