Publication 2100-IN012B-EN-P - April 2005
1-4 General Information
UL/CSA Marking
CENTERLINE Motor Control Centers (MCCs) are listed by Underwriter’s
Laboratories, Inc. (UL), Standard for Safety UL 845 and certified by the
Canadian Standards Associate (CSA), Standard C22-2, No. 14.
Due to standards harmonization, a motor control center may also carry the
cUL designation. cUL is comparable to CSA certification.
Vertical sections and units are labeled independently. It is possible to have
combinations of labeled and non-labeled sections and units in the same motor
control center.
Vertical sections and structure options that are UL listed and CSA/cUL
certified are marked accordingly. All components in a UL or CSA listed section
must be UL listed and cUL/CSA certified. The UL and/or CSA/cUL
designation is an integral part of the section nameplate. See Figure 1.1.
Units and unit options that are UL listed and CSA/cUL certified are marked
accordingly. All options and components in a UL and/or cUL/CSA listed unit
must be UL listed or recognized and/or cUL/CSA certified. The UL
designation is located on the interior of the bottom plate of plug-in units or on
the interior right-hand side plate of frame mounted units. See Figure 1.4.
Figure 1.4 UL Label Designation for Units
Short Circuit Rating Label
Motor control center vertical sections that are UL listed and/or CSA/cUL
certified will carry a short circuit rating label. The short circuit rating label for a
vertical section is located on the inside of the vertical wireway door of standard
sections or on the interior right-hand side plate of special width sections. See
Figure 1.5.
Figure 1.5 Short Circuit Label for Sections
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