GE Industrial Solutions Entellisys Installation - Manual (Page 28)

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Entellisys Low Voltage Switchgear
Chapter 3. Description
Fig. 3-19 illustrates the various components comprising the
insulation/isolation system for the horizontal main bus bars.
The horizontal bus bars (2) are insulated with an epoxy
coating applied by a fluidized bed process. The vertical/
horizontal bus bar joints are covered with collars (3) and caps
(4) held in place with nylon thumb screws (5). The collars
and caps are constructed from insulating material.
1. Vertical bus barrier
2. Insulated bus bar (powder coated)
3. Joint collars
4. Joint caps
5. Nylon thumbscrews
Fig. 3-19. Horizontal bus insulation system
3-11 Feeder Cable and Busway
Compartment
The rear cable and terminal compartment, Fig. 3-20, provides
for cable installation and terminations. The cable bending
space meets the requirements of the 2005 National Electric
Code. Various arrangements of single or double cable
terminals are provided, depending upon the purchaser's
requirements.
1. Support rack for customer's feeder cables
2. Cable lugs - mechanical type
3. Cable lugs - compression type
Fig. 3-20. Cable termination provisions
When specified, racks (1), Fig. 3-20, for the support of feeder
cables are located in the cable compartment. The actual
support of the cables is provided by lashing them to these
racks.
A neutral bus, insulated from ground, is provided in the bus
area on switchgear designed for four-wire systems. The
neutral bus is located near the top of the cable compartment.
It includes provisions for terminating the neutral conductor
of four-wire feeder cables and also direct mounting of the
neutral CT as required for those feeder system circuit
breakers having an integral ground fault trip function.