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Safety & Health Effects of Shift Work - ASSE Members

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CONCLUSION<br />

So, what is fact, what is fiction<br />

and what is fad By using NFPA<br />

70E to create a strong electrical<br />

safety-related work practices program,<br />

you can differentiate the<br />

fact from the fiction, while<br />

emphasizing for yourself and<br />

employees that this is not a fad.<br />

What is your action plan<br />

•established and documented electrical safety training<br />

program for all employees;<br />

•written electrical safety program;<br />

•lockout/tagout program, which includes establishing<br />

an electrically safe work condition;<br />

•energized work procedures and equipment;<br />

•energized work justification and approval;<br />

•shock hazard analysis;<br />

•flash hazard analysis;<br />

•PPE and insulated tools.<br />

By leaving behind the “fad factor” and establishing<br />

a strong program based on understanding <strong>of</strong> NFPA<br />

70E, every employee can be afforded a safe work<br />

environment. <br />

Michael Kovacic is president <strong>of</strong> TMK and Associates Inc., a<br />

Cleveland, OH-based safety consulting firm specializing in<br />

electrical and lockout/tagout safety. For questions or comments<br />

about this article, call (866) OSHA-ZONE, e-mail Kovacic at<br />

mkovacic@oshazone.com or visit www.oshazone.com.<br />

Read an Excerpt From Z244.1<br />

The following is an excerpt from the standard, “Control<br />

<strong>of</strong> Hazardous Energy—Lockout/Tagout and Alternative<br />

Methods” [ANSI/<strong>ASSE</strong> Z244.1-2003 (R2008)]. To purchase<br />

the full standard, click here. To view all <strong>of</strong> our standards,<br />

click here.<br />

4. DESIGN<br />

4.1 Manufacturer, Integrator, Modifier, and Remanufacturer<br />

Responsibilities. Machines, equipment and<br />

processes shall be designed, manufactured, supplied, and<br />

installed so that the user can comply with the control<br />

methodologies <strong>of</strong> this standard. Modifications affecting<br />

energy isolation shall comply with this standard. A risk<br />

assessment shall be performed during the engineering<br />

design stage <strong>of</strong> development to determine the need for<br />

and design sufficiency <strong>of</strong> appropriate energy isolating<br />

devices and systems. (See Annex A)<br />

4.1.1 Exposure Minimization. Manufacturers, integrators,<br />

modifiers, and remanufacturers shall design<br />

machines, equipment, and processes to be reliable, therefore<br />

requiring a low level <strong>of</strong> intervention. The machine,<br />

equipment or process should be designed so that personnel<br />

are not exposed to hazardous energy during routine<br />

and repetitive servicing and maintenance activities.<br />

NOTE: This can be accomplished by positioning controls<br />

outside hazardous areas, adding controls at appropriate<br />

locations, providing external lubrication points, or<br />

providing guarding.<br />

4.1.2 Partial Energization. For those functions when<br />

partial energization is necessary, the manufacturer, integrator,<br />

modifier, or remanufacturer shall perform a risk<br />

assessment similar to that outlined in Annex A to determine<br />

the safest method <strong>of</strong> machine, equipment or<br />

process access. When it is necessary for machines, equipment<br />

or processes to remain partially energized (e.g. in<br />

order to hold parts, save information, retain heat, or provide<br />

local lighting), alternative control methodologies<br />

shall be provided for personnel safety.<br />

4.2 Energy Isolating Devices. Machines, equipment<br />

and processes shall be designed, manufactured, supplied,<br />

and installed with energy isolating devices to enable compliance<br />

with the requirements in 5.3. Consideration shall<br />

be given to the intended use <strong>of</strong> the machine, equipment<br />

or process. Devices shall be capable <strong>of</strong> controlling or dissipating<br />

hazardous energy, or both. The devices should be<br />

an integral part <strong>of</strong> the machine, equipment or process.<br />

When these devices are not integral to the machine,<br />

equipment or process; the manufacturer shall include in<br />

the installation instructions recommendations for type<br />

and location <strong>of</strong> energy isolating devices.<br />

4.2.1 Location. Energy isolating devices shall be accessible<br />

and, when practical, be conveniently located to facilitate<br />

the application <strong>of</strong> lockout devices during service and<br />

maintenance.<br />

NOTE: Energy isolating devices are best located outside<br />

any hazardous areas, at a convenient manipulating height<br />

from an adjacent walking area (i.e., not overhead, on ladders,<br />

or under machinery).<br />

4.2.2 Identification. All energy isolating devices shall<br />

be adequately labeled or marked unless they are located<br />

and arranged so that their purpose is clearly evident. The<br />

identification shall include the following:<br />

a) machine, equipment, or process supplied;<br />

b) energy type and magnitude.<br />

NOTE: The potential for error will be reduced if personnel<br />

are not expected to rely on memory or experience<br />

as to which isolating devices apply to which machines,<br />

equipment or processes. When machine, equipment or<br />

process placarding or posting contains the required energy<br />

isolating device identification, individual devices may<br />

be marked or coded and their identity referenced on the<br />

placard or posting information.<br />

Where conditions such as security are warranted,<br />

coded identification is acceptable.<br />

Examples <strong>of</strong> labeling or marking (e.g., tags, embossing,<br />

engraving, stenciling, etc.) language are as follows:<br />

Main Power Press 3 (480V); Natural Gas-Process Line 2;<br />

Hydraulic Pump Discharge (800 psi); Bay A Compressed<br />

Air (100 psi). <br />

Copyright ©2008 by <strong>ASSE</strong>. All rights reserved. No part <strong>of</strong> this<br />

publication may be reproduced in any form, in an electronic<br />

retrieval system or otherwise, without the prior written permission<br />

<strong>of</strong> the publisher.<br />

22<br />

Safely Made www.asse.org 2011

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