Recent content by three phase

Great. I have relays that will do that. Thanks fellas

I want to use 24v to break 120v loads. I understand the logic for dc circuits but I am not sure how to break 120v loads. What relay do i use? I was looking at the altronix RAC120 or RAC24. Do I break just the hot leg of the 120v? Any help on such a beginner question would be...

Thanks, appreciate the advicer

the 120v feeds from the 3 phase sub panel are going to equal transformers, perhaps a 1kva 120v/24v transmformer. These are all identical. Would it be better to run a different UPS? Possibly a 240v 2-phase (L,L,N,G, if that's even right) circuit to the distribution for 120v circuits? I...

the equipment runs 24/7 but it has different loading at different times. btw, is your name a jay and silent bob quote?

Im bringing the three phase because the runs are over 1000 feet. I am going to run awg 4 stranded copper wire to reduce voltage drop. Is there a panelboard that will accept a 3 wire three phase main, provide a nuetral and ground bar, and have single phase breaker outputs that will ensure...

I have a 125amp, 240v three phase circuit feeding a 30 kva UPS through a delta/wye transformer, leaving 208/120v three phase entering my panelboard. I plan to use 50 amp, 3 pole breakers, with a neutral and ground, making 5 wire three phase. My question is: When I bring the 5 wire, three...