Note
the following colors are used for the pre-terminated wires:
•
Line 1 – Black
•
Neutral - White
•
Grounding Conductor - (Green-Yellow)
If these power terminations cannot be made at the enclosure, they can be made
directly to the power termination panel in the display. The following steps need to be
done to complete internal connections:
1.
Open the display as explained in Section
4.4
and locate the power
termination panel for these displays.
2.
Route the cable through conduit to the back of the display – use one of the
½
”
knockouts for access, being careful not to damage any internal
components.
3.
Disconnect the wires to the terminal block to the external J-box, and
connect the wires from the direct cable using a small flat screwdriver to
open the cage clamps. Release the jumper wires connected to the external
power termination box.
4.
Install the wires from the direct circuit into the breaker and cage clamps
following the directions in
•
Hot to circuit breaker 1 (line side)
•
Neutral to gray terminal block (line side)
•
Ground to green/green yellow terminal block
5.
Power will need to be connected to all
display faces.
Main Disconnect
The National Electrical Code requires the use of a lockable power disconnect near
the display. Provide a lockable disconnect switch (knife switch) at the display
location so that all power lines can be completely disconnected. Use a 3-conductor
disconnect so that both hot lines and the neutral can be disconnected. The main
disconnect should be mounted at or near the point of power supply connection to the
display. A main disconnect is to be provided for each supply circuit to the display.
Figure 17: Power Installation to Power Termination Box)
3-6
Electrical Installation
