Daktronics TN-2007, Руководство по установке и обслуживанию, Страница: 19 / 68

Electrical Installation 3-5
3.7 Signal
Signal for the scoreboards travels directly from the controller, typically a RC-100
controller. The signal for these scoreboards requires no signal wire, because it is a
wireless radio signal.
3.8 Power Disconnect
Power to the display should be routed through a fused disconnect switch capable of
opening all ungrounded power conductors. The National Electrical Code requires a
means of disconnect visible (in a direct line of sight) from the display. This
requirement protects workers by keeping the disconnecting means within view while
they are servicing the display. An exception to this requirement is the type of
disconnect which may be locked in the open position, and that may be located
elsewhere. Daktronics recommends providing a lockable disconnect switch (knife
switch) at the display location so that all power lines can be completely
disconnected.
Note: Use a multi-connector disconnect so that all hot lines and the neutral line can
be disconnected. Power conductors from the disconnect to the display should be
routed through conduit in agreement with local code.