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ARTICLE 220 - BRANCH CIRCUIT AND FEEDER CALCULATIONS …

Reprinted with permission from NFPA 70-1968, the National Electrical Code , Copyright 1967, National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the complete and official position of the National Fire Protection Association, on the referenced subject which is represented only by the standard in its entirety. National Electrical Code and NEC are registered trademarks of the National Fire Protection Association, Inc., Quincy, MA 02269. ARTICLE 220 - BRANCH CIRCUIT AND FEEDER CALCULATIONS 220-1.

Telephone Exchanges. Shall be waived for manual switchboards and switching frames in telephone exchanges. The provisions of Section 220-2(b) shall apply to all other ... fixed and portable appliances, each installation should be considered as to the load likely to be imposed and the capacity

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Chapter 14

arlweb.msha.gov

Chapter 14 EMERGENCY ACTION PLANNING MAY 2009 14–1 14.1 PURPOSE Emergency action planning for dams includes establishing procedures and …

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SAND, GRAVEL, AND CRUSHED STONE ON-THE-JOB …

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MSHA HANDBOOK SERIES

arlweb.msha.gov

MSHA HANDBOOK SERIES U. S. Department of Labor ... Industrial Power Systems Handbook by Beeman (McGraw-Hill) National Electrical Code, 1968, 1971, 1975, ... Electric Power Distribution for Industrial Plants - IEEE Standard 141-1976 2. EEE Green Book. Recommended Practice for

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MSHA - Second Update on Failure of High Pressure Gas ...

arlweb.msha.gov

Equipment Alert – November 4, 2011 2nd Update on Failure of High Pressure Gas Fittings and Valves in Refuge Alternatives An Equipment Alert and an update have been issued regarding valve and fitting failures on breathable air components of refuge alternatives.

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ARTICLE 430 - MOTORS, MOTOR CIRCUITS AND …

arlweb.msha.gov

(4) The locked-rotor current if a polyphase motor or if a single phase motor having a full-load current more than 4.5 amperes at 230 volts or 9 amperes at 115 volts. (5) The words "Thermally Protected" if a thermal protector integral with the motor-compressor is provided. Exception: The full-load current may be marked on the

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30 CFR Part 46 Starter Kit with Sample Training Plan

arlweb.msha.gov

30 CFR Part 46 Starter Kit with Sample Training Plan U.S. Department of Labor Mine Safety and Health Administration National Mine Health and Safety Academy . Instruction Series Guide IG 36 . December 1999 Reprinted 2001 . Visit our website at . ... 43 Training Materials ...

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INSPECTING AND REPLACING WIRE ROPES

arlweb.msha.gov

A cement plant worker was killed when the boom hoist rope of a mobile crane broke, dropping the crane boom on him. Much ofthe hazard of wire rope breakage can be eliminated by following a few simple safety rules: 1. Always assume a wire rope could break at anytime. 2. Do not work or pass under the buckets or booms of shovels, draglines, or cranes

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WORKPLACE EXAMINATIONS

arlweb.msha.gov

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ARTICLE 240 - OVERCURRENT PROTECTION A. Installation

arlweb.msha.gov

Exception No. 4. Feeder Taps. A conductor tapped from a feeder shall be considered as properly protected from overcurrent when installed in accordance with Sections 364-8 and 430-59. Exception No. 5. Feeder Taps Not Over 10 Feet Long. Where (1) the smaller conductor has an ampacity of not less than the sum

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REVISED GUIDELINES FOR THE MAINTENANCE AND …

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Telephone: +44 (0)20 7735 7611 Fax: +44 (0)20 7587 3210 MSC.1/Circ.1432 31 May 2012 ... dioxide systems or portable fire extinguishers. Refer to the comprehensive instructions provided ... Test a sample of detectors and manual call points so that all devices have been tested within five years. For very large systems the sample size should be ...

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MS - Guide - testing and tagging portable electrcial ...

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Maintaining portable electric equipment in low-risk environments Page 5 of 6 Class II equipment is marked with a . If you cannot see this symbol, you should assume that the item is a Class I appliance and carry out a portable appliance test. Table 1 Suggested initial intervals for checking portable electrical equipment

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