Ins allation w th Only a Neutral Conductor Provided
t
i
Installations where no grounding conductor is provided must comply with article
250-32 of the National Electrical Code. If the installation in question meets all of the
requirements of article 250-32, the following guidelines must be observed:
·
Connect the grounding electrode cable at the local disconnect, never at the
display power termination panel.
·
A disconnect that opens all of the ungrounded phase conductors should be
used.
·
The neutral and the ground conductors should be bonded in the display
power termination panel.
Refer to
Figure 17
below for installation details.
Figure 17:
Installation with Only Neutral Conductor Provided
3.5 Control Cable Requirements
RS232
This cable is a 2-conductor shielded cable used to transmit an RS232 signal
(Daktronics part number W-1117). This unshielded cable should not be subjected to
mechanical flexing after installation. This cable is
not
for direct burial and should be
routed in a dedicated, grounded, metallic conduit at the base of the display structure.
This cable has a maximum length of 25 feet.
Electrical Installation
3-5
