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Illustrated Changes to the NEC, 2005 Edition - Part 2

Article 525

Carnivals, Circuses, Fairs, and Similar Events

525.11 Multiple Sources of Supply

Part II. Power Sources

This rule was proposed to reduce the likelihood of electric shock. All sources of supply, separated by less than 12 ft, for rides, attractions, and other structures must now be bonded to the same grounding electrode system.

Where multiple services or separately derived systems or both supply rides, attractions, and other structures, all sources of supply that serve rides, attractions, or other structures separated by less than 12 ft must be bonded to the same grounding electrode system.

Authorís Comment: The 12 ft separation of structures value is simply a nominal value; there is no technical reason for this measurement.


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