PART 1 GENERAL

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PART 1 GENERAL
1.01 SCOPE
A. This section includes the requirements for 600 V class Low Voltage Motor Control
Centers (MCCs) for use on alternating current power systems
B. The MCCs shall be furnished and installed as specified in this section and as shown on
the contract drawings
1.02 RELATED SECTIONS
A. Section 26 28 00 Circuit Breakers and Fusible Switches
B. Section 26 29 13.13 Low Voltage Controllers – Across the Line Motor Controllers
C. Section 26 29 13.16 Low Voltage Controllers – Solid State Reduced Voltage Starters
D. Section 26 29 23 Variable Frequency Drives
E. Section 26 36 00 Automatic Transfer Switch
F. Section 26 43 13 Transient-voltage Suppression for Low-voltage Electrical Power
Circuits
1.03 REFERENCES
A. The MCC shall meet or exceed the requirements within the following standards for
MCCs.
1. NEMA ICS 18 – Industrial Control and Systems: Motor Control Centers
2. UL 845 – UL Standard for Safety for Motor Control Centers.
NOTE: UL 845 is a harmonized standard consisting of:
a) Underwriters Laboratories Inc. (UL) UL 845
b) Association of Standardization and Certification (ANCE) NMX-J-353-ANCE-
2006
c) Canadian Standards Association (CSA) C22.2 No. 254-05
3. NFPA 70 – National Electrical Code
B. The MCC shall be designed, manufactured, and tested in facilities registered to
ISO 9001
C. Arc Resistant or Arc Containing Low Voltage MCCs shall be tested, rated and labeled in
accordance with the requirements of IEEE C37.20.7-2007 “IEEE Guide for Testing
Metal-enclosed Switchgear Rated up to 38 kV for Internal Arcing Faults”.
1.04 DESIGN REQUIREMENTS
A. Provide MCC based upon applicable NEMA and UL standards and in accordance with
the detailed contract specifications and drawings.


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