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NEMA WC 50

76th Edition, 1976

Complete Document

Ampacities Including Effect of Shield Losses for Single-Conductor Solid-Dielectric Power Cable, 15kV Through 69kV (Copper and Aluminum Conductors)

Includes all amendments and changes through Reaffirmation Notice , 1999


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W/D NO S/S * WHICH IS BASED ON ICEA P-53-426
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Description / Abstract:

This publication presents calculated ampacities for single-conductor solid-dielectric 15 through 69 kV power cables with bonded and grounded shields, copper or aluminum conductors, spaced or trefoil configurations, single or double circuits, directly buried or in buried ducts. Ampacities are given for four different shield resistances for each conductor size. For spaced cables, ampacities are also given for open-circuited shield operation.

Trefoil—Three cables which have been installed in close contact and which may or may not have been bound together at the time of installation.

 
ANSI/NEMA MW 1000, 2014