Grits
Stainless
- Joined
- Dec 14, 2004
- Location
- Little Rock, Arkansaw
Hello Everyone!
I need help verifying wire size to a transformer. Below is the application and the variables.
My thirty by fifty workshop is currently single phase. I currently use a couple of phase converters for my machine tools. I have two-hundred amps of 480 three-phase one-hundred sixty feet away. There is plenty to spare on the three-phase service. I plan to run the three-phase to my workshop into a transformer that will step the-three phase down to around one-hundred amps of single phase and maybe fifteen amps of 220 three-phase. I have not bought a transformer yet. I have a transformer at the three phase service that is 15 KW. I was told it was equal to about one hundred plus amps of single phase. All it does it run a few small items. The transformer is protected with a thirty amp breaker.
I found a wire size calculator and entered the variables for thirty amps of three phase 480 and came up with a wire size of #14 copper wire. That seems way on the light size to me.
I am adding the transformer to eliminate a meter and have true three phase power in my shop. My one hundred amp service is adequate for what I do. Other that a five horse power air compressor, I never run two tools at once. The shop is air conditioned with electricity and heated with gas.
I am open to any and all suggestion as to transformer type, transformer size, and wire size. In the past, I have worked with three phase or single phase but not both together with the exception of a small transformer in a three phase box.
Thank you for you help.
Grits
I need help verifying wire size to a transformer. Below is the application and the variables.
My thirty by fifty workshop is currently single phase. I currently use a couple of phase converters for my machine tools. I have two-hundred amps of 480 three-phase one-hundred sixty feet away. There is plenty to spare on the three-phase service. I plan to run the three-phase to my workshop into a transformer that will step the-three phase down to around one-hundred amps of single phase and maybe fifteen amps of 220 three-phase. I have not bought a transformer yet. I have a transformer at the three phase service that is 15 KW. I was told it was equal to about one hundred plus amps of single phase. All it does it run a few small items. The transformer is protected with a thirty amp breaker.
I found a wire size calculator and entered the variables for thirty amps of three phase 480 and came up with a wire size of #14 copper wire. That seems way on the light size to me.
I am adding the transformer to eliminate a meter and have true three phase power in my shop. My one hundred amp service is adequate for what I do. Other that a five horse power air compressor, I never run two tools at once. The shop is air conditioned with electricity and heated with gas.
I am open to any and all suggestion as to transformer type, transformer size, and wire size. In the past, I have worked with three phase or single phase but not both together with the exception of a small transformer in a three phase box.
Thank you for you help.
Grits