Installation: Switchboard Location And Requirements; Before Installation; Front Access; Rear Access - GE ABB ReliaGear SB Installation, Operation And Maintenance Manual

R E L I A G E A R ® S B S W I TC H B O A R D S
8
Installation: Switchboard location
and requirements

Before installation

Before any installation work is performed, study all
drawings furnished by the supplier. These include
arrangement drawings (front, end, and plan views),
connection diagrams, and schedule of equipment.
Any material external to the equipment that may be
required to meet any local codes (such as mats,
screens, or railings) is not included. Installations in
damp areas may have additional requirements in
the National Electrical Code (NEC).
Positioning
When locating the switchboard, confirm that
the installation location and positioning conforms
to all applicable codes for aisle, working space,
and placement requirements (refer to NEC article
110.26). In general, the working space in front
of and behind the switchboard should be enough
to open all doors, remove circuit breakers, and
conduct inspection and maintenance activities.
Service entrance equipment should be placed
close to the building's incoming connections.
Make sure the installation location is clean and
dry before placing the switchboard. Prepare
connections between sections before placing
the sections in their final locations. Consult the
manufacturer provided documentation for any
construction specific clearance, rear access,
or front access space needed around the
switchboard. Remove the switchboard from the
skids when it is ready to be placed in its final
location (see Handling, page 5).
Clearances
In general, a small clearance of one inch between
the back and sides of the switchboard and any
walls or obstructions is recommended. However,
this clearance is not required unless a 30kVA or
larger transformer is integral to the switchboard.

Front access

The space in front of the switchboard must
be enough to allow the doors to open, circuit
breakers to be installed and removed, and
in front access switchboards, for field connections
to be inspected and maintained. See the supplier
documentation provided with the switchboard
for specific front access information.

Rear access

A larger clearance behind the switchboard may be
needed for rear access so that field wiring
terminals can be maintained. See the supplier
documentation provided with the switchboard for
specific rear access information.
Foundation requirements
Indoor equipment
DANGER
The floor or foundation must be strong enough
to support the weight of the switchboard and the
shock stress caused by opening of the breaker
WARNING
under fault conditions. The shock loading is
approximately 1-1/2 times the static load. If
the foundation is subject to vibrations, special
CAUTION
mounting provisions must be installed to prevent
transmitting vibrations to the equipment.
NOTICE
Note: For seismically certified equipment, refer to
the installation instructions on page 10.
SAFETY
INSTRUCTIONS