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North Carolina Department of Insurance Office of State Fire Marshal Risk Management

Learn about the guidelines for protecting cables, conductors, and raceways from physical damage in the 2017 Electrical Code. Find approved illustrations and written interpretations at the North Carolina Department of Insurance's Office of State Fire Marshal website.

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North Carolina Department of Insurance Office of State Fire Marshal Risk Management

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  1. North Carolina Department of Insurance Office of State Fire Marshal Risk Management State Electrical Division 2017 State Electrical Code 300.4 - Protection Against Physical Damage

  2. Notice: The following illustrations are approved by the State Electrical Division of the North Carolina Department of Insurance, Office of State Fire Marshal. These illustrations are intended to demonstrate but not supersede the official written interpretations found at the following web address: http://www.ncdoi.com/OSFM/State_Electrical_Division//Default.aspx?field1=State_Electrical_Code_and_Interpretations Joseph Starling Chief State Electrical Engineer & Inspector Illustrated by: Danny Thomas State Electrical Inspector

  3. Date: June 12, 2018 2017 Electrical Code Subject: Protection Against Physical damage Section: 300.4 Question: Who determines when a cable, conductor, or raceway is subject to physical damage?

  4. Date: June 12, 2018 2017 Electrical Code Subject: Protection Against Physical damage Section: 300.4 Answer 1: The electrical inspector is the person who determines when an installation is subject to physical damage. This includes all sections within the electrical code within general that require protection where physical damage is likely to occur to the installation. It is impossible for the Engineering Division to determine if an installation is or will be subject to physical damage. The electrical inspector is the most qualified person to make this decision while physically observing the installation and environment or while performing a plan review. Therefore, any concerns with the enforcement of subject to physical damage should be addressed with the inspections department prior to performing the installation. The Engineering Division asks inspectors and inspections departments to aid installers in solving the dispute prior to the installation. Additionally, if an inspections departments has a rule that broadly defines a typical area of installation as subject to physical damage, the Engineering Division asks that inspection departments notify electrical installers at the time of permitting the work. Examples of a broad determination for subject damage: Everywhere unconcealed that is outside and below 8 feet.

  5. Date: June 12, 2018 2017 Electrical Code Subject: Protection Against Physical damage Section: 300.4 A good guideline is everywhere unconcealed that is outside and below 8 feet.

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