Specifications

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Panelboard Example When deciding between a panelboard and a switchboard in
commercial applications, it is not always clear which product
you should chose. In the following small commercial application
example, up to 1200 amps at 480 volts is supplied by the utility
to a power panelboard. Multiple circuits are used to supply
power throughout the facility. For simplicity, only a few devices
are shown. For example, one circuit is used to supply power
through a transformer to a lighting and appliance panelboard
which controls lighting and electrical outlets. Another circuit
supplies power to a motor through a motor starter.
Motor
Starter
AC Motor
1200 A,
480 VAC
From Utility
120 VAC
Panelboard
480 VAC
Transformer
Power Panelboard
Switchboard Example In larger or more demanding commercial applications,
switchboards are often used to distribute power. In the following
example, up to 2400 amps at 480 volts is applied to the service
section of a switchboard. For simplicity, only a few devices
are shown. For example, one circuit supplies power through
a transformer to a lighting and appliance panelboard which
controls lighting and electrical outlets. Another circuit supplies
power to a power panelboard located further away or on
another floor. This power panelboard supplies power to a motor
and to a lighting and appliance panelboard.
2400 A,
480 VAC
From Utility
Feeder
Busway
Feeder Busway
Switchboard
Power
Panelboard
TransformerTransformer
480 VAC
480 VAC
120 VAC
480 VAC
120 VAC
Panelboard
Panelboard
Motor
Starter
480 VAC
AC Motor