NEC 700.8

Not sure about optional standby.

700.8 Surge Protection.
A listed SPD shall be installed in or on all emergency systems switchboards and panelboards.

700.2 Definitions.
Emergency Systems.
This definition shall apply within this article and throughout the Code.
Those systems legally required and classed as emergency by municipal, state, federal, or other codes, or by any governmental agency having jurisdiction. These systems are intended to automatically supply illumination, power, or both, to designated areas and equipment in the event of failure of the normal supply or in the event of accident to elements of a system intended to supply, distribute, and control power and
illumination essential for safety to human life.
Informational Note: Emergency systems are generally installed in places of assembly where artificial illumination is required for safe exiting and for panic control in buildings subject to occupancy by large numbers of persons, such as hotels, theaters, sports arenas, health care facilities, and similar institutions. Emergency systems may also provide power for such functions as ventilation where essential to maintain life, fire detection and alarm systems, elevators, fire pumps, public safety communications systems, industrial processes where current interruption would produce serious life safety or health hazards, and similar functions.
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roger said:
I need to clarify my reply, 701 and 702 are not emergency systems (and 700 is not Life Safety) so 700.8 is only dealing with Emergency Systems
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I am confused. 700.8 applies to "emergency systems", and emergency systems are defined as stated in the definitions that would include both life safety and legally required. Doesn't that mean that SWBDs, Distribution Boards and Panel Boards are required to have SPD? If so, are SPDs required at all SWBDs, DISTBDS and PNLBDS, or just at the start of each of the systems, which would then provide protection for everything downstream?
 
Read 700.2, 701.2, and 702.2, notice the difference for each system. Life Safety is only in article 517 Healthcare facilities and although it is similar to article 700 it is only used in Healthcare.
 
steve holt said:
I am confused. 700.8 applies to "emergency systems", and emergency systems are defined as stated in the definitions that would include both life safety and legally required. Doesn't that mean that SWBDs, Distribution Boards and Panel Boards are required to have SPD? If so, are SPDs required at all SWBDs, DISTBDS and PNLBDS, or just at the start of each of the systems, which would then provide protection for everything downstream?
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How does the definition in Article 100 include legally required standby systems?
Emergency Systems.
Those systems legally required and classed as emergency by municipal, state, federal, or other codes, or by any governmental agency having jurisdiction. These systems are intended to automatically supply illumination, power, or both, to designated areas and equipment in the event of failure of the normal supply or in the event of accident to elements of a system intended to supply, distribute, and control power and illumination essential for safety to human life. (CMP-13)

Legally Required Standby Systems.
Those systems required and so classed as legally required standby by municipal, state, federal, or other codes or by any governmental agency having jurisdiction. These systems are intended to automatically supply power to selected loads (other than those classed as emergency systems) in the event of failure of the normal source. (CMP-13)
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Now that I am a little clearer on what systems are required to have SPD, do all panels on the Emergency System need SPD or as long as the panel serving everything down stream has SPD, the rest are covered too?
 
steve holt said:
Now that I am a little clearer on what systems are required to have SPD, do all panels on the Emergency System need SPD or as long as the panel serving everything down stream has SPD, the rest are covered too?
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700.8 Surge Protection.
A listed SPD shall be installed in or on all emergency system switchgear, switchboards, and panelboards.
 
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