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Changes in hazardous locations requirements in the 1993 NationalElectrical Code
Ballard, A.W. Sengupta, S.
Crouse-Hinds, Syracuse, NY;

This paper appears in: Petroleum and Chemical Industry Conference, 1992, Record of Conference Papers., Industry Applications Society 39th Annual
Publication Date: 28-30 Sep 1992
On page(s): 43-47
Meeting Date: 09/28/1992 - 09/30/1992
Location: San Antonio, TX, USA
ISBN: 0-7803-0750-X
References Cited: 0
INSPEC Accession Number: 4402937
Digital Object Identifier: 10.1109/PCICON.1992.229328
Current Version Published: 2002-08-06

Abstract
The National Electrical Code revision process is discussed, as are many of the proposals incorporated into the 1993 NEC. Nonincendive circuits are contrasted with nonincendive components. Resistivity is no longer used in classifying dusts, and coal is now considered nonconductive. Class II surface temperatures may now be based on the specific dust, not only the group involved. Proposals for Division 0 were rejected and this issue, including `increased safety' is examined in detail. Type AC cable is excluded as a wiring method in hazardous locations. In Class I, a new method for sealing multiconductor cable in conduit is approved, as are additional types of cable tray in Cable II, Division 2

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