The Sealing of Underground Raceways.

NH 2022-2023 Licensing Concerns and Deficiencies.
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NH 2022-2023 Licensing Concerns and Deficiencies.

2022-2023 License and Installation Concerns Bulletin.

The Electricians' Licensing Board in conjunction with the State Electrical Inspectors, municipal electrical & building inspectors & other representatives of the electrical industry in the State of New Hampshire have put together this list of common licensing and installation concerns and problems encountered by the Board's office staff relative to the State's licensing law RSA 319-C and the administrative rules.

4. The sealing of raceways

Although often overlooked, there are several sections of the Code that list the requirements for the sealing of raceways to prevent water – usually in the form of condensation due to temperature differences – from entering the equipment via the raceway system. The sealant used shall be identified for use with the cable insulation, conductor insulation, a bare conductor, a shield, or other components. An explosion proof seal shall not be required for this purpose.

  Click here to view the NH amendments to the 2020 NEC  

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The Sealing of Underground Raceways.

Below is a Real Question from our Electrical Continuing Education Courses for Electrical License Renewal:

If a raceway is required by the NEC to be sealed to prevent water or condensation, which of the following is true?

A: The sealant used shall be identified for use with the cable insulation, conductor insulation, a bare conductor, a shield, or other components. An explosion proof seal shall not be required for this purpose.
B: Spare or unused raceways are NOT required to be sealed.
C: They must be sealed at both ends.
D: They must be terminated nearest to the point of entry.
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