Ampacity Underground by Tom Henry
Ampacity Underground by Tom Henry
A new Article in the 2020 NEC
Article 311 - Medium Voltage Conductors and Cables
The scope of Article 310 has been revised and is now limited to not more than 2,000 volts. Requirements and ampacity tables for conductors over 2,000V have been relocated into a new Article 311.
The new Article 311 will include the installation, construction, and ampacities for medium voltage conductors and cable (Type MV). Previously covered in different articles (310 and 328), the information has been combined into one new article.
I feel with the new Article 311, exam questions will start asking about your knowledge of equation. One must first understand how the equation is applied. |
310.15(B) Equation |
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Equation |
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Description | Ampacity Underground by Tom Henry
A new Article in the 2020 NEC Article 311 - Medium Voltage Conductors and Cables Article 328 from the 2017 NEC was deleted, and its contents were relocated to a new Article 311, "Medium Voltage Conductors and Cables." This new article also incorporates requirements for medium volatge cables and conductors rated over 2,000 volts, which were formally located in Article 310.
The scope of Article 310 has been revised and is now limited to not more than 2,000 volts. Requirements and ampacity tables for conductors over 2,000V have been relocated into a new Article 311. The new Article 311 will include the installation, construction, and ampacities for medium voltage conductors and cable (Type MV). Previously covered in different articles (310 and 328), the information has been combined into one new article.
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