Specifications

98
American Bureau of Shipping (ABS)
CENTERLINE 2100 MCCs have fulfilled the requirements and are approved by the American Bureau of Shipping (certificate
99-SB55875-X). CENTERLINE 2100 MCCs do meet ABS shipping requirements, but due to required customization, ABS
maritime shipping is available only on the Engineered program.
NEMA Class
NEMA—National Electrical Manufacturers Association.
The following is a description of Class I, as paraphrased from NEMA standard ICS 18-2001: Class I motor control centers
shall consist of mechanical groupings of combination motor control units, feeder tap units, other units and electrical
devices arranged in a convenient assembly. They include connections from the common horizontal power bus to the
units. They do not include interwiring or interlocking between units or to remotely mounted devices, nor do they include
control system engineering. Only diagrams of the individual units are supplied.
NEMA Class II interwiring offers the addition of interlocking and wiring between units as specifically described in overall
control system diagrams supplied by the purchaser. Contact your local Rockwell Automation Sales Office for availability.
NEMA Type
Class I motor control centers can be provided in NEMA Type A or B construction:
• Type A—User’s power and control connections are made directly to the device within the unit.
• Type B—Terminal blocks are supplied for user’s control termination within unit insert. On NEMA size 1 through 3
starter units and 30…100 A contactors units, terminal blocks are also supplied for user’s load terminations
(NEMA Type BT). NEMA Space Saving units do not include power terminal blocks (NEMA Type BD).
NEMA/IEC Enclosure Comparison
The following table is a comparison of Allen-Bradley CENTERLINE 2100 MCC NEMA enclosure type numbers to IEC
Standard 60529, Classification of Degrees of Protection Provided by Enclosures. The comparison is based on data from
tests conducted on the CENTERLINE 2100 MCC enclosures and the NEMA enclosure type test requirements, which meet or
exceed the IEC enclosure classification designation test requirements
NEMA Type 1 vented (with or without gasketed doors) IP20
NEMA Type 1 vented with filters (with or without gasketed doors) IP30
NEMA Type 1 non-vented (without gasketed doors) IP40
NEMA Type 1 with drip hood = NEMA Type 2 (with or without gasketed doors) IP41
NEMA Type 3R IP44
NEMA Type 12 without bottom plates IP53
NEMA Type 12 with bottom plates IP54
NEMA Type 4 IP65