10
E M A X LI N K 2 A B B R E V I ATE D
LV S W I TC H G E A R A P P L I C AT I O N G U I D E
Bus ratings and sizes
The number of installed bars per phase depends on
the current ratings. Up to five bars per phase may
be installed.
Busbar systems are 3-phase, 3-wire or 3-phase,
4-wire. See Horizontal Neutral Bus for details.
There is the option of only having 3-phase, 4-wire
in the incoming section and the rest of the lineup
will be 3-phase, 3-wire.
Sections in the same shipping split will be
connected at the factory. For lineups that combine
multiple shipping splits, each shipping split must
be connected together during installation using
the splice kits provided on each split. The splice
kits’ bolts must be tightened to the specified
torque. See the Torque Table provided in this
manual.
Horizontal bus is available in silver-plated copper or
optional tin-plated copper.
Bus ratings and sizes
Horizontal neutral bus (optional feature)
When required, a 100% rated neutral horizontal
busbar is provided in the busbar compartment
above the lower A-phase horizontal busbar. For
4-wire systems that have no line-to-neutral load
requirements, an incoming neutral connection
point can be provided to facilitate the power
system grounding connection, but without neutral
horizontal or distribution busbars.
Ground bar
A continuous, sectionalized, copper ground bus,
¼”X 4”, is provided at the rear of all sections. In the
cable compartment, the ground bar is linked to the
ground bar in other sections by a splice link.
Ground bars
The switchgear ground bus must be grounded
using equipment- grounding conductors sized
according to NEC standards, or by bonding the
ground bus to the raceway enclosing the main
supply conductors according to NEC standards.
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Assembly construction
3,200A set
MBB 2,000
1,600A set
MBB 2,000
4,000A set
MBB 2,000
2,000A set
MBB 2,000
5,000A set
MBB 2,000
Ground bar
