Results 151 to 160 of about 138,563 (198)
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Electrical Engineering, 1962
The Insulated Power Cable Engineers Association published in 1943 the original edition of “Current Carrying Capacity of Impregnated-Paper, Rubber and Varnished Cambric Insulated Cables.” The excellent tables in this book were based on the best American practice at the time they were published and, as the title implies, were quite extensive in their ...
J. H. Neher +7 more
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The Insulated Power Cable Engineers Association published in 1943 the original edition of “Current Carrying Capacity of Impregnated-Paper, Rubber and Varnished Cambric Insulated Cables.” The excellent tables in this book were based on the best American practice at the time they were published and, as the title implies, were quite extensive in their ...
J. H. Neher +7 more
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Ampacities for Cables in Trays with Firestops
IEEE Power Engineering Review, 1981This paper describes how cable ampacity is influenced by firestop materials for various cable and firestop configurations. Both solid silicone elastomer and silicone RTV foam elastomer firestops were evaluated. To determine cable derating factors, laboratory tests were performed with the cable tray fully loaded to obtain the maximum operating ...
C. Nemeth, G. Rackliffe, J. Legro
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A Flexible Model to Calculate Buried Cable Ampacity in Complex Environments [PDF]
IEEE Transactions on Power Delivery, 2022 The ampacity of buried cables is significantly influenced by the thermal properties of the burial environment. When these thermal properties are not homogeneous it is usually necessary to utilize simulations with a relatively high computational cost that may also use commercial software. In this paper an alternative approach is proposed using conformal
George Callender +3 more
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Fire protection wrapped cable tray ampacity
IEEE Transactions on Energy Conversion, 1989A method is presented for calculation of ampacity of cable in fire protection wrapped cable trays. A brief description of the model is presented. The iterative technique used for solution of the model's simultaneous transcendental equations is presented with a description of the computer program.
Phil Save, Gary Engmann
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Ampacity derating for underground cables
Conference Record, Industrial and Commercial Power Systems Technical Conference, 1988., 2003A 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 ...
F. Shokooh, H.M. Knutson
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Ampacity of cables in single open-top cable trays
IEEE Transactions on Power Delivery, 1994A mathematical thermal model that can predict the operating temperatures for cables when there is load diversity in single, horizontal, open-top cable trays is presented. The model accommodates two different loading scenarios-one in which the heat load is distributed evenly across the cable tray cross-section and a second one which concentrates the ...
B.L. Harshe, W.Z. Black
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Ampacities of power cables wound on reels
IEEE Transactions on Power Delivery, 1994This paper presents a mathematical model that is capable of calculating the ampacity of a wide variety of power cable designs consisting of an arbitrary number of layers on a cable reel. The model considers round cables with copper conductors. The validity and accuracy of the ampacity model were verified by comparing the predicted temperature ...
W.Z. Black +3 more
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Ampacity Calculations for Cables in Shallow Troughs
IEEE Transactions on Power Delivery, 2010This paper presents the findings of an investigation concerning a calculation method for current-carrying capability (ampacity) of cables located in a shallow trough. The investigations proceeded in two parallel directions. On the one hand, an extensive search of published and unpublished records dealing with the subject was performed.
George J. Anders +2 more
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The effect on ampacity for multiple cable crossing and mitigation to improve its ampacity
2016 IEEE International Conference on Power and Energy (PECon), 2016At some point underground, there are high voltage cables and medium voltage cables that will be crossing each other. Many utilities do not consider or ignore the derating of ampacity caused by multiple cables crossing. In IEC 60287-3-3: Calculation of Power Ratings — Cables Crossing External Heat Sources, the ampacity rating for only two crossing ...
Ainin Sofiya Radzi +7 more
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Cable Ampacity in Tray With Raised Covers
IEEE Power Engineering Review, 1986Power cable tray systems in generating stations are installed with tray covers that may be raised over the tray side rail. Raising the tray cover allows installation of the cover without cutting and fitting the cover around conduits that terminate at the tray.
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