Article 685

[hhsting]

Does anyone here know what is an integrated electrical system as mentioned in NEC 2017 Article 685? Is it for Business B buildings or for industrial buildings only?

 

[d0nut]

Seeing as how 685.1 Scope states "An integrated electrical system as used in this article is a unitized segment of an industrial wiring system where all of the following conditions are met", I would tend to believe that it is for a unitized segment of a wiring system, in industrial buildings only, that meets all three of the items in the list.

 

[LarryFine]

Seeing as how 685.1 Scope states "An integrated electrical system as used in this article is a unitized segment of an industrial wiring system where all of the following conditions are met", I would tend to believe that it is for a unitized segment of a wiring system, in industrial buildings only, that meets all three of the items in the list.

That makes perfect sense. Now stop that.

 

[EC Dan]

If you want more info here is what the NEC handbook commentary has to say about it:

The integrated electrical systems commonly used in large and complex industrial processes are designed, installed, and operated under stringent on-site engineering supervision. The control equipment, including overcurrent devices, is located so that it is accessible to qualified personnel, but that location might not meet — and is not required to meet — the conditions described in the Article 100 definition of the term readily accessible. Locating overcurrent devices and their associated disconnecting means so that they are not readily accessible to unqualified personnel is one of the preventive measures used to help maintain continuity of operation. For some industrial processes, the sudden loss of electric power to vital equipment is an unacceptable level of risk, and an orderly shutdown procedure is necessary to prevent severe equipment damage, injury to personnel, or — in some extreme cases — catastrophic failure. Orderly shutdown is commonly employed in nuclear power–generating facilities, paper mills, and other areas with hazardous processes.