3
Instructional Leaflet
IL019116EN
Effective July 2016
Installation guidelines for users of Magnum DS
Low-Voltage Front-Access Switchgear Assemblies
for seismic applications
EATON
www.eaton.com
Plan view
Floor steel
Floor steel
Floor steel
Switchgear 1
Switchgear 2
Switchgear 1
Switchgear 2
2.50
(63.5)
a
c
b
c
b
c
b
c
b
c
a
c
c
d
Figure 2. Welding of indoor structures to imbedded floor steel—front-access back-to-back Magnum switchgear
a
0.19 inches (4.8 mm) weld, 4.00 inches (101.6 mm) long at two places on front of each section starting 0.50 inches (12.7 mm) from each edge of structure.
b
Internal bracket on each end of line-up to be plug welded to floor steel.
c
For nuclear installations, weld per AWS D1.1, alternatively, welding procedures and personnel qualifications may be performed IAW ASME BPVC Section IX and the inspections
be performed IAW AWS D1.1, and/or D1.3, and/or D9.1.
d
0.19 inches (4.8 mm) weld, 4.00 inches (101.6 mm) long at two places on rear of each section on Switchgear 1 only, starting 0.50 inches (12.7 mm) from each edge of structure where indicated.
