Daktronics P1756, Installation Manual

Electrical Installation

8

4  Electrical Installation

CAUTION – RISK OF ELECTRIC SHOCK:

 Only qualified individuals should perform power 

routing and termination to the system. It is the responsibility of the electrical contractors 

to ensure that all electrical work meets or exceeds local and national codes. Failure to 

follow installation guidelines will result in audible noise on the sound system and possible 

damage to internal components. 

Note: 

This product is not provided with mains disconnect. Customer shall provide 

disconnect at base of sound system location that meets or exceeds local and 

national electrical codes. 

Electrical installation will vary depending on whether the amplifier is housed in a portable 

or permanent rack. Refer to the appropriate section below. 

Portable System

Reference Drawings:

Riser; SS-200, Electrical, Portable System ........................................................

DWG-4306293

In a portable system, the amplifier is housed in a rolling rack (

Figure 4

) that can be 

brought to the venue for an event and removed once it is finished. Refer to 

DWG-

4306293

 for a typical portable system setup with up to four speakers. 

The portable system requires a permanently-mounted Speaker Junction Box within 30' 

(9.1 m) of the amplifier rack location and up to 250' (76.2 m) from local 1-gang junction 

box(es). The local 1-gang junction box(es) are to be mounted within range of the 30' 

(9.1 m) speaker whip. This provides a maximum of 310' (94.5 m) from the speaker(s) to 

amplifier rack. The Speaker Junction Box is to be mounted in an accessible location for 

the portable amp rack to easily plug in. 

Power IN

The portable system requires one (1) 20 amp, 120 VAC circuit within 3' (0.9 m) of the 

amplifier rack. Connect the included power cord between the 

POWER

 inlet on the rear of 

the rack and the nearby outlet. A duplex outlet is recommended to also provide power 

for the control rack (typically the SSR-AM). 

Note: 

Do not power on the amplifier rack if the front cover is installed! This will cause 

damage to the amplifier by blocking airflow. 

Signal IN

Connect the included XLR cable between the 

OUTPUT

 jack of the control rack (typically 

the SSR-AM) and an 

INPUT

 jack on the rear of the amplifier rack. 

Speaker OUT

1� 

Connected to the rear of each speaker is a 30' (9.1 m) speaker wire. Route this wire 

to a local 1-gang junction box, one per speaker. 

2� 

Route 1-pair, 12 AWG speaker wire in conduit from each 1-gang junction box to the 

main Speaker Junction Box and terminate per the wiring diagram in 

DWG-4306293

. 

3� 

Locate the 30' (9.1 m), 8-conductor cable inside the amplifier rack. Connect this 

cable between the 

SPEAKER OUTPUT

 jack on the rear of the rack and the mating jack 

on the bottom of the Speaker Junction Box. 

Note: 

If there is a single speaker within 30' of the portable amp rack, it may be possible 

to connect directly to the Speaker Junction Box using no local junction boxes.