Lencore Spectra Classic: Installation and Operations Manual - Manual (Page 6)

POWER REQUIREMENTS
FOR SOUND MASKING TRANSFORMERS
Please have your electrician install one or more 120 volt/20
amp circuits in a 4-inch square box (see sample).This electrical
box should be installed above the acoustical ceiling in the
cubicle area or in a centrally located electrical closet.
Typically, one standard junction box can handle up to
(4) 40va transformers or (1) 95va transformer. Be sure to
specify and have your electrician install enough junction
boxes to accommodate the number of units for your specific
project.
HOOKING UP THE TRANSFORMER
Power is to be connected by an electrical contractor. Installer to provide
a UL 1411 recognized transformer with an output of 16/18 volts. Use 16-
18 volt step down transformers. These are designed to be connected to
junction boxes. There is a knock out plug on the side of the junction box:
for the smaller 40va transformer. Several transformers can be connected
to a junction box if you are bringing all of the home runs to a central
area. A sep arate circuit is recommended.
TRANSFORMER CAPACITY CHART*
All transformers 16|18 v 40va 95va
Masking Only no page 33 units 78 units
Masking with moderate paging levels 21 units 48 units
Masking with maximum paging levels 12 units 33 units
Junction Box measures
4 inches square, 2 1/8 inches deep
* All capacity information assumes a ratio of one main to two secondary speakers.
section 1
1.3 | hooking up the transformer
4