9-7 Log #513 NEC-P09 Final Action: Accept in Principle
(100.Metal-Enclosed Power Switchgear)
________________________________________________________________
TCC Action: It was the action of the Correlating Committee that further
consideration be given to the comments expressed in the voting regarding
use of a single voltage, rather than ?below 600 (or 1000) volts?.
In addition, the NEC standard method of referencing the voltage levels
of ?600 volts or less? or ?1000 volts or less? must be followed for
consistency throughout the NEC.
This action will be considered as a public comment.
Submitter: Joel A. Rencsok, Scottsdale, AZ
Recommendation: Revise the definition to read as follows:
Metal-Enclosed Power Switchgear. A switchgear assembly completely
enclosed on all sides and top with sheet metal (except for ventilating openings
and inspection windows) and containing primary power circuit switching,
interrupting devices, or both, with buses and connections. the assembly may
include control and auxiliary devices. Access to the interior of the enclosure is
provide by doors, removable covers, or both. Metal-enclosed power-switchgear
is available in non-arc-resistant or arc-resistant constructions.
Substantiation: Metal-enclosed power switchgear is not listed by UL only
metal-enclosed switchgear is so the definition should reflect the real equipment.
All listings appear to be over 600 volts only.
Panel Meeting Action: Accept in Principle
Retitle the definition ?Metal-Enclosed Power Switchgear? in Article 100 as
?Switchgear? and revise the definition and provide a new informational note as
follows:
An switchgear assembly completely enclosed on all sides and top with sheet
metal (except for ventilating openings and inspection windows) and containing
primary power circuit switching, interrupting devices, or both, with buses and
connections. The assembly may include control and auxiliary devices. Access
to the interior of the enclosure is provided by doors, removable covers, or both.
Metal-enclosed power Switchgear is available in non-arc-resistant or arc-
resistant constructions.
Informational note: All switchgear subject to NEC requirements is metal
enclosed. Switchgear rated below 600 (or 1000) volts may be identified as
?Low-Voltage Power Circuit Breaker Switchgear?. Switchgear rated over 1000
volts may be identified as ?Metal-Enclosed Switchgear? or ?Metal-Clad
Switchgear?. Switchgear is available in non-arc-resistant or arc-resistant
constructions.
Panel Statement: CMP 9 modified the existing definition for ?Metal-Enclosed
Power Switchgear? to make it inclusive of all types of switchgear under the
purview of the NEC. The new definition creates the opportunity to utilize the
generic term in all locations where the term ?switchboard? is already
mentioned, and where the use of the term ?switchgear? is appropriate. The
definition was also modified to remove the defined term from its content as
required by the NEC Style Manual, and explanatory material was removed and
inserted into the Informational Note that now follows.
The term ?Switchgear? includes ?Metal-Enclosed Low-Voltage Power Circuit
Breaker Switchgear?, ?Metal-Clad Switchgear?, and ?Metal-Enclosed
Interrupter Switchgear? according to ANSI C37.20 documents. The UL mark
on ?Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear? reads
?Low-Voltage Power Circuit Breaker Switchgear?. See also a companion panel
proposal to change references in Article 490 from ?metal-enclosed? and
?metal-clad? to just ?switchgear.? There are also a large group of proposals
from CMP 9 to change similar references in the remainder of the code. For
complete incorporation of the term within Article 408, see panel action on the
comprehensive panel proposal thereto. See also the panel statement and panel
action on Proposal 9-104.
Number Eligible to Vote: 12
Ballot Results: Affirmative: 12
Comment on Affirmative:
FERRARO, J.: ?The voltage reference ?600( or 1000 volts)? in the
Informational note should be editorially corrected to a single voltage to match
the actions taken on the 600 to 1000 volt proposals.
