Wheatstone SP-8, Technical Manual

Page: 15 / 128

Page 1 - 6 SP-8 / Dec 95
Each piece of equipment should be connected by its own ground wire
(usually the round third pin on the AC cord). This means that every AC outlet
must have a separate conductor run to the console ground lug terminal; the
outlets cannot be daisy-chained as is normally encountered in commercial and
residential AC systems. Any equipment not supplied with 3-wire AC cables
must have individual ground wires (16 gauge or larger) connected to their
chassis grounds and then run to the console mainframe ground.
Further Grounding Details
Check all equipment to be absolutely certain that each unit is power
transformer isolated from the AC mains to prevent safety hazards.
It is assumed that in each piece of audio equipment the audio ground and the
chassis are tied together at some point. Any piece of equipment lacking a
grounded chassis is likely to be prone to interference problems.
Locate all unbalanced audio equipment in the same rack if possible, to
minimize chassis ground potential differences. It may also be helpful to
insulate each piece of unbalanced equipment from its mounting rails in the rack
by means of nylon 10-32 screws and insulating washers between rails and
faceplates.
Once the system is properly grounded, you may proceed with the audio
and control input/output connections (next chapters).
The aforementioned "isolated
AC ground" (orange studio
outlet; see page 2-2) can also
be used to accomplish the
required grounding.
I
NSTALLATION
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