Section 18. Switchgear and Metal Enclosed Bus
- Allen L. Clapp P.E., P.L.S.
Published Online: 24 AUG 2011
Copyright © 2006 The Institute of Electrical and Electronics Engineers, Inc. All rights reserved.
National Electrical Safety Code Handbook, Sixth Edition
How to Cite
Clapp, A. L. (ed) (2011) Section 18. Switchgear and Metal Enclosed Bus, in National Electrical Safety Code Handbook, Sixth Edition, John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9781118098974.ch13
- Published Online: 24 AUG 2011
- Published Print: 10 JAN 2011
Print ISBN: 9780738149301
Online ISBN: 9781118098974
- dead-front power switchboards;
- metal enclosed bus;
Rule 180A addresses the conditions in which switchgear is expected to exist and function. The rule is intended to (1) limit deleterious action by dust, liquids, or harmful gases and (2) limit damage to the equipment from undue stresses or shocks. This rule carries the provisions of Rule 180A forward with specific applications to metal-enclosed power switchgear. Several of the sub-rules invite careful reading. Rule 180B2 normally requires two exits in switchgear rooms to assure access from all parts of the room, if any particular piece of equipment presents a safety problem. Rule 180B2 now requires swing-out doors and fire exit hardware; doorknobs do not meet the requirements. Rule 180B13 was deleted in the 1984 Edition because of the literal impossibility of meeting the rule; certain parts of switchgear are combustible under certain conditions.
Controlled Vocabulary Terms
electrical safety; switchgear