Manual | MNS-SG Operation and Maintenance 7
1.3. Technical data table
Type-tested switchgear
assemblies (TTA)*
ANSI C37.20.1, ANSI C37.20.7, ANSI C37.50, ANSI
C37.51, ASCE/SEI 7-05, CSA C22.2 No. 31, IEEE
1584, UL 50 E, UL1558, UL508
The MNS-SG is designed, tested and
constructed in accordance with the
following industry standards and
guidelines:
Rated insulation voltage Vi
Rated operating voltage Ve
3 phase-3 wire, 3 phase-4 wire
Rated ampacities main and
distribution busbars
Rated short circuit current
90.6 (2,300) [without chimney, plenum or top hat]
23.6 (600) 27.6 (700) 31.5 (800) 39.4 (1,000) 19.7
(500) transition section
E = approximately 1.0 inch (25 mm)
Alu-zinc coated/galvanized/stainless steel
Alu-zinc coated/galvanized/stainless steel
Paint color gray ANSI 61 hammered tone
NEMA 1 (arc-resistant)
NEMA 1 with gasketing (non arc-resistant)
Self-extinguishing, flame retardant
Standard - silver plated, tin-plated (copper available)
Standard - textured ANSI 61
Special colors available)
* TTA: Switchgear assembly corresponding to the original type or system
of switchgear assembly type tested in accordance with these standards.