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Evaluation and Acceptance Criteria for Innovations in Explosionproof Electrical Enclosures.

Authors
Gunderman-RJ
Source
NTIS: PB/83-233379 :141 pages
Link
NIOSHTIC No.
10003024
Abstract
A conventional trailing cable connection box on a continuous mining machine was modified by the addition of two innovative devices: a pressure vent to preclude buildup of high pressure caused by an explosion inside the enclosure and a grommet-type cable entry to simplify and speedup cable entering procedures. The devices were evaluated for 8 1/2 months in a working section of an underground coal mine. Laboratory tests before and after the in-mine exposure show no measurable change in the devices. Following the favorable in-mine evaluation, technical performance criteria were defined to serve as the basis of approval for the use of the devices. Additional tests to measure comparable gripping of the cable by asbestos rope, substitution rope materials, and by the urethane grommet-type entry were included. Also, literature covering the last 80 years was searched. Comments are provided as to how the devices comply with 30 cfr part 18.
Publication Date
19820101
Document Type
CP; Final Contract Report;
Fiscal Year
1982
NTIS Accession No.
PB83-233379
NTIS Price
A08
Identifying No.
OFR 127-83
NIOSH Division
PRC;
Source Name
NTIS: PB/83-233379
State
IN;
Performing Organization
J. Min. Mach., Dresser Ind. Inc.
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