US Navy/Lennar Mare Island

High Voltage Panels
This large, 3000-amp-plus, 480-volt system is located on
Mare Island in Vallejo. This was one of the US Navy’s
submarine development sites, which is now controlled
by Lennar Mare Island.

American Electrical was asked to design and install a
sub-metering system at building #112 that could read
the power usage of the area controlled by Home Depot
for employee training. Current transformers, also known
as CTs, were used to make the current readings.

The pictures at the top and bottom-middle show the
6-750kcmil conductors for each phase of this system.
The picture on the right is the front of the conductor pull-section. Mare Island Power is the power company and the power meter is the one in the middle of the panel board. The other two meters
are for amperage and voltage readings.