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November-December 1998
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September-October 1998 CoverNovember/December 1998

TABLE OF CONTENTS

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Features

Service & Main Bonding Jumpers

by J. Phillip Simmons

The main bonding jumper is one of the most critical elements in the safety grounding system. This conductor is the link between the grounded service conductor, the equipment grounding conductor and in some cases, the grounding electrode conductor. The primary purpose of the main bonding jumper is to carry the ground-fault current from the service enclosure as well as from the equipment grounding system that is returning to the source. In addition, where the grounding electrode conductor is connected directly to the grounded service conductor bus, the main bonding jumper ensures that the equipment grounding bus is at the same potential as the earth. Read more


Departments

Canadian Code

Grounding & Bonding

by Leslie Stoch

The Canadian Electrical Code has a long and precise definition for grounding as: "a permanent and continuous conducting path to the earth with sufficient ampacity to carry any fault current liable to be imposed upon it, and of sufficiently low impedance to limit the voltage rise above ground and to facilitate the operation of the protective devices in the circuit.” When we talk about grounding, we are usually thinking about electrical systems. Read more

The Other Code

Safety Signs, Labels and Tags

by David Young

The National Electrical Safety Code® (NESC®) occasionally references other standards. For example, ANSI Z535.1-1991 through ANSI Z535.5-1991 inclusive are referenced many times within the NESC. Most of these references are made in a NOTE: following a rule. Rule 015D explains that a NOTE: indicates material provided for information or illustrative purposes only. When a standard is referenced in a NOTE:, compliance with the standard is not mandatory. Read more

Editorial

A Vote for the Future

by Philip Cox

A hearty thanks to IAEI members. The proposed change in the IAEI Articles of Association that included an increase in membership dues received a favorable vote during the 1998 IAEI Annual Section meetings. Over 90% of those casting votes during the section meetings supported the dues increase. The support expressed by members of the IAEI was and is vital to the existence of the IAEI as an active and effective organization in the electrical industry. Read more




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