Archived from groups: nz.tech,rec.audio.pro (
More info?)
In article <MPG.1bbf5e70af9d390c98a4e9@news.paradise.net.nz>,
Patrick Dunford <patrickdunford@nomail.invalid> wrote:
> Every sound system manual I have ever seen recommends strongly you have
> dimmers on a separate phase from the sound system.
>
> The problem with this is, most dimmer packs are three phase.
>
> Short of not using 1/3 of your channels, what can be done about the noise
> problems?
three hots into the dimmer
and you only have two legs coming from the distro
if it is one dimmer opwer it all off one leg
if it is multi dimmers power I half off one leg and the other half off
the other
just use a service and cableing adaquate for the job
most venues that use lots of portable systems have seperate services for
sound and lights with independent disconnects
I just bought the behringer dimmer that was set up for 3 phase
20 amp120v/ph
I hard wired it to three single breakers in a disconnect(breaker box)
all on the same phase this disconnect connects with tails and camlocs
to a mains(at venue) that can supply at least 60 amps/phase
if I can not get the power I have two option
1 down size lighting rig
2 limit the draw by restricting the maximum brightness of the
lamps(easily done with a trimmer on my control desk)
george