National Electrical Installation Standards

Standards as High as Your Own

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Wednesday, May 25, 2022

Question:

Greetings,

If a worker is installing medium voltage splices for a pad-mounted transformer, does he or she need to be qualified? How are qualifications determined?

Thanks for the help.

Mike Reed

A

Answer:

Hello Mike,

Good question. The answer to the first part is yes. Sections 328.14 (2017 NEC) and 311.30 (2020 NEC) have a requirement that indicates Type MV cable shall be installed, terminated, and tested by qualified persons. There is also an informational note about accepted industry practices and installation procedures for medium-voltage cable are described in ANSI/NECA/NCSCB 600-2014, Standard for Installing and Maintaining Medium-Voltage Cable and in IEEE 576-2000, Recommended Practice for Installation, Termination, and Testing of Insulated Power Cables as Used in Industrial and Commercial Applications. The second part of the question is a bit more involved, but minimum qualifications are typically demonstrated by licensing or certification. Also good to remember that achieving minimum credentials does not necessarily mean a person is qualified. The other important aspects of qualifications are training and experience. Hope this is useful.

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