Have (6) Lite-Puter 12 channel x 20 amp units that are two years old. After an hour or so we'll start getting flickers. Ran new DMX, swapped out consoles, had elec company come in and verify supply. ALL checked out fine.
Then I find out old lighting dimmer rack had same flicker issue going back 8+ years. So drilling down the only thing that's common is supply and output cables to fixtures.
Brought electrician in and took supply apart. Each dimer is on own dedicated 3 phase / 208 v supply using #4 copper cable to all.
Then we discovered one of the supplies on one dimmer is #4 alum AND all 6 neutrals are #4 alum.
At this point our theory is that the #4 alum returns are causing back pressure since they can't handle the return loads when running a full concert rig.
Any ideas? Is it worth spending approx $800 to swap out all the alum for copper AND up size the neutrals to #2.
Thanks for any feedback.
Then I find out old lighting dimmer rack had same flicker issue going back 8+ years. So drilling down the only thing that's common is supply and output cables to fixtures.
Brought electrician in and took supply apart. Each dimer is on own dedicated 3 phase / 208 v supply using #4 copper cable to all.
Then we discovered one of the supplies on one dimmer is #4 alum AND all 6 neutrals are #4 alum.
At this point our theory is that the #4 alum returns are causing back pressure since they can't handle the return loads when running a full concert rig.
Any ideas? Is it worth spending approx $800 to swap out all the alum for copper AND up size the neutrals to #2.
Thanks for any feedback.