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NEMA ICS 4

2015 Edition, January 1, 2015

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Application Guideline for Terminal Blocks



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Description / Abstract:

This Applications Guideline applies to one-piece, or modular, or two piece terminal blocks with screwtype, screwless-type, or insulation-displacement clamping units intended for industrial use and fixed to a support or to a printed circuit board (PCB) to provide electrical and mechanical connection for the following round, solid, or stranded conductors:

a) Copper conductors only, without special preparation, having a cross-section of 24 AWG to 2000 kcmil (0.2-1014 mm2).

b) Aluminum (uncoated) conductors only, without special preparation, having a cross-section of 12 AWG to 6 AWG (2.5-16 mm2) for solid conductors and 12 AWG to 2000 kcmil (3.3-1014 mm2) for stranded conductors.

c) Aluminum (uncoated) and copper conductors, without special preparation, having a crosssection of 12 AWG to 6 AWG (2.5-16 mm2) for solid conductors and 12 AWG to 2000 kcmil (3.3-1014 mm2) for stranded conductors.

The terminal blocks are intended for use in circuits of rated insulation voltage not exceeding 1000 V AC at a frequency not greater than 60 Hz or not exceeding 1500 V DC.

This Applications Guideline does not apply to connectors specifically designed for, and forming, an integral part of equipment, which are dealt with in the relevant equipment standards.

NOTE—This Applications Guideline may be used as a guide for the termination requirements for disconnect-type or other special terminal blocks for which there is no standard at this time.
ANSI/NEMA MW 1000, 2014