Ampacity derating for underground cables

A simple manual method of utilizing adjustment factors to derate cable ampacities for underground installations is presented. The ampacity adjustment factors reported are obtained based on the Neher McGrath method. Various items that affect ampacities of cables are discussed in practical terms and e...

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Bibliographic Details
Published inConference Record, Industrial and Commercial Power Systems Technical Conference, 1988 pp. 92 - 98
Main Authors Shokooh, F., Knutson, H.M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1988
Subjects
Cables
Conductors
Dielectric losses
Heat transfer
Power generation
Resistance heating
Temperature
Thermal conductivity
Thermal factors
Thermal resistance
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Summary:A simple manual method of utilizing adjustment factors to derate cable ampacities for underground installations is presented. The ampacity adjustment factors reported are obtained based on the Neher McGrath method. Various items that affect ampacities of cables are discussed in practical terms and examples are included to illustrate the method and its use.< >
DOI:10.1109/ICPS.1988.10984