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BESTT.ED TECHNOLOGY INC <br /> 4.0 ELECTRICAL INSTALLATION <br /> 4.1 Requirement for electrical instailation <br /> Notice:The following electrical installation requirements must be followed or the sign warranty will be <br /> voided. Electrical installation must only be attempted by a qualified electrician.Electrical connection <br /> must comply with all applicable national and local codes. <br /> The electrical installation of signs varies greatly.The following bullet points are requirements. It <br /> is the sign instaIler's responsibility to ensure that the installallon complies with all national <br /> and local codes. <br /> • All power wiring must be from circuit breaker-protected lines. <br /> • The sign must be run on its own dedicated circuit to ensure proper operation. <br /> • Wire gauge and breakers must be sized or verified in accordance with input power <br /> specifications(found on the product label),the National Electric Code, and applicable <br /> local codes. Under-sizing the wire gauge or breaker size can lead to interxnittent sign <br /> operation or malfunction. <br /> • DO NOT connect the sign to a GFI-protected circuit. <br /> • All electrical conduit connections must be watertight. <br /> • Use minimum 80°C copper wire only. <br /> • Separate conduits must be used for signal wires(for example,RS232,RS485)and for <br /> power wires. If power and communication wires are put in the same conduit,there is a <br /> chance the communication wires might pick up electrical interference from the power <br /> wires and thus leading to PGsign communication errors.However,fiber optic wire may <br /> be run in the same conduit with power wires. <br /> 4.2 Sign earth-grounding <br /> Properly grounding each sign is necessary because it is an essential means of preventing shock, <br /> shock hazards, and potential fire hazards.A sign bonded to an earth ground has a means of <br /> dissipating the high voltage and current from a lightning strike. The resistance of the grounding <br /> electrode must be as low as possible. However,damage can still occur to a sign's electronic <br /> equipment from lightning voltage transients. Though some surge protection is incorporated into a <br /> sign,to protect a sign from high-voltage lighhung transients, surge protectors need to be <br /> installed. On some models of outdoor signs,a ground lug is provided at the back of the sign for <br /> earth-grounding purpose. <br /> Installation Manual <br /> 16 <br />