Power Disconnect
The National Electrical Code requires the use of a lockable power disconnect within sight of
or at the display. Follow these guidelines for correct connection:
•
Connect the grounding electrode cable at the local disconnect, never at the display
driver/power enclosure.
•
Use a disconnect that opens all of the ungrounded phase conductors.
In order for this device to provide protection, the power
must
be disconnected when the
display is not in use. The controller should also be disconnected from power and from the
signal j-box when the system is not being used. The same surges that may damage the
display's driver can also damage the controller's circuit.
Power Installation
To access the power termination block inside the display, open the latch access fasteners on
the middle digit panel (
). Use a screwdriver to turn the fasteners a half-turn
counterclockwise to open the panel.
Figure
9:
Location of Power Termination Block
Connect 120 VAC power to the power termination block as labeled (
Figure 10: Power Termination
Electrical Installation
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