Magnetic fields produced by underground residential distribution system

Keith Holbert, George G. Karady, Sanket G. Adhikari, Michael L. Dyer

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Increasingly dense residential housing developments have spurred new concerns about electromagnetic fields. The magnetic fields generated by the underground distribution system in such a residential subdivision are assessed in this study. In particular, the magnetic flux densities above the underground cables, around the padmount transformers and junction boxes, and at the service entrance panels are measured. The largest magnetic fields of 95 mG and 148 mG are recorded on the surfaces of the transformer enclosures and junction boxes, respectively, at around 30% to 40% of full load. The magnetic fields reduce to less than 3 mG at a distance of ∼m from the distribution system infrastructure. Software is developed to estimate the peak magnetic field generated at full load conditions by the underground cables composed of twisted conductors.

Original languageEnglish (US)
Pages (from-to)1616-1622
Number of pages7
JournalIEEE Transactions on Power Delivery
Issue number3
StatePublished - 2009


  • Electromagnetic fields
  • Magnetic fields
  • Power cables
  • Underground power distribution lines

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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