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7.2 Electrical requirements
Power system
Power voltage must be in the range of the specification value.
It is recommended to use a power distribution system (a power distribution system with a
separate neutral and grounding conductor in order to avoid large ground current loops
due to voltage differences in the neutral conductor.
The total electrical installation should be protected by an appropriately rated disconnect
switch, circuit breakers.
The electrical installation must only be performed by a qualified electrician. Electrical
connections must comply with all applicable national and local codes.
Cabling & Connection
All internal cabling must be properly connected and seated.
All power wiring must be from circuit breaker protected lines. Do not connect to an
unprotect circuit.
Do not route power and communication wires in the same conduit. Separate conduits
must be run for communication wires and power wires. However, fiber optic wire may be
run in the same conduit with power wires.
Grounding
The LED display screen must be properly grounded according the applicable national and
local codes.
Properly grounding every display cabinet is necessary as it is essential to prevent shock,
shock hazards, and fire hazards.
Lighting Strike Protection
A LED display screen cabinet bonder to an earth ground aims to dissipate the high
voltage and current from a lighting strike. The resistance of the grounding electrode must
be as low as possible. However, damage can still occur to a LED display screen
cabinet`s electronic equipment from lighting voltage transients.
Though some surge protection is incorporated into a LED display screen in order to
protect the display from high voltage lighting transients, surge protectors need to be
installed.
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