What type of extension is mentioned in Article 382?

Article 382 of the National Electrical Code (NEC) specifically addresses Nonmetallic Extensions. These extensions are used to provide additional pathways for electrical conductors and cables while ensuring safety and compliance with code requirements. Nonmetallic materials can offer advantages such as resistance to corrosion, reduced weight, and ease of installation compared to metal alternatives.

This focus on nonmetallic extensions is significant within the context of electrical installations, as they must meet specific requirements related to fire ratings, moisture resistance, and other safety considerations outlined in the NEC. Nonmetallic extensions are particularly useful in residential applications or areas where metal raceways could be susceptible to weather or other environmental factors.

The other types mentioned, such as strut-type channel raceways, surface metal raceways, and metal wireways, are indeed covered under different articles in the NEC but do not specifically fall under Article 382, which is dedicated to outlining the parameters for Nonmetallic Extensions.