1 General Information

Other Resource Publications for CENTERLINE Motor Control Centers

PublicationTitle

NEMA Enclosure Type Descriptions IEC 60439

2100-2.0 Recommended General Specifications NEMA Type 1: 2100-2.0.1 CENTERLINE MCC Specification Checklist
Type 1 units and sections are intended for indoor use, primarily to provide a degree of protection against contact with the enclosed equipment in locations where unusual service conditions do not exist. The industrial enclosures are designed to meet the rod entry and rust resistance design tests. The enclosure is sheet steel, treated to resist corrosion. 2400-2.0.1 IEC Specification Checklist 2100-4.2 Mains and Incoming Lines Dimension 2100-5.0 Bulletin 2100/2400 User Manual 2100-6.0.2 Renewal Parts Publication NEMA Type 1 with gasketed doors (sometimes referred to as 1G) : 2100-DD1 Dimension Drawings
Type 1 with gasketed unit doors are completely gasketed around the perimeter of the unit doors. All gasketing is closed cell neoprene. 2100-WD1 Wiring Diagrams 2100-TD005 x -EN-P DeviceNet Specification Guide NEMA Type 3R: 2100-TD019 x -EN-P DeviceNet Hardware Manual
Non-walk-in front mounted only. Door-within-a-door construction. Type 3R units and sections are intended for outdoor use, primarily to provide a degree of protection against falling rain and to avoid damage from the formation of ice on the enclosure. They are designed to meet rod entry, rain, external icing, and rust resistance design tests. They are not intended to provide protection against conditions such as dust, internal condensation, or internal icing. Contact your local Rockwell Automation sales representative, Allen-Bradley distributor or www.theautomationbookstore.com for copies. NEMA Type 4:
Non-walk-in front mounted only. Door-within-a-door construction. Type 4 units and sections are designed for indoor and outdoor use, primarily to provide protection against windblown dust and rain, splashing water, and hose-directed water. They are also designed to remain undamaged by the formation of ice on the enclosure. They are designed to meet hosedown, external icing, rod entry, and rust-resistance design tests. The enclosures are not designed to protect against internal condensation or internal icing.

NEMA Defined

NEMA—National Electrical Manufacturers Association.

NEMA Class

The following is a description of Class I, as paraphrased from NEMA standard ICS 3-1993: 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 12
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Type 12 enclosures are intended for indoor use, primarily to provide a degree of protection against dust, falling dirt, and non-corrosive dripping liquids. They are designed to meet drip, dust, and rust resistance tests. They are not intended to provide protection against conditions such as internal condensation. [1]This publication refers to standard NEMA Type 12 design (i.e., standardsheet steel). For stainless steel NEMA Type 12 enclosures, Contact your lo-cal Rockwell Automation Sales Office.

NEMA Type

The Bulletin 2100 structures, Bulletin 2400 units, and many Bulletin 2100 units fulfill IEC 60439 type tested assembly (TTA) and unit requirements. Should custom designs and modifications be required, these can be qualified to IEC 60439 as partially pre-tested assembly (PTTA) and unit requirements. 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 in unit insert. On NEMA size 1 through 3 units, terminal blocks are also supplied for user’s load terminations (NEMA Type B-T).

American Bureau of Shipping (ABS)

CENTERLINE motor control centers have fulfilled the requirements of and are approved by the American Bureau of Shipping (certificate 99-SB55875-X). Therefore, should ABS maritime application be required, the CENTERLINE product does fulfill these needs, but due to the customization that is required, ABS is available only on the Engineered delivery program. Contact your local Rockwell Automation Sales Office.

NEMA/IEC Enclosure Comparison

The following table is a comparison of Allen-Bradley Bulletin 2100 and 2400 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 Bulletin 2100 enclosures and the NEMA enclosure type test requirements, which meet or exceed the IEC enclosure classification designation test requirements (i.e., the comparison is for Bulletin 2100 enclosures only)

Seismic Applications

CENTERLINE MCCs meet the requirements for Uniform Building Code (UBC) Zone 4 seismic applications. Rollout Drive construction (Bulletins 2162P and 2163P) are not seismic rated. .
NEMA Type 1 vented (with or without gasketed doors)IP20NEMA Type 1 vented with industrial filters (with or without gasketed doors)IP30NEMA Type 1 non-vented (without gasketed doors)IP40NEMA Type 1 with drip hood = NEMA Type 2 (with or without gasketed doors)IP41NEMA Type 3RIP44NEMA Type 12 without bottom platesIP53NEMA Type 12 with bottom platesIP54NEMA Type 4IP65

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