I WORK FOR A COMPANY AS A PLANT ENGINEER THAT CURRENTLY HAS A 1200 TON PRESS AND THEY ARE LOOKING FOR INSTALLING ANOTHER 1000 TON PRESS. THE BUS IS ON A 2000 AMP SWITCHGEAR AND THERE IS CURRENTLY A PARTS WASHER THAT PULLS 200 AMPS, A 600 TON PRESS THAT PULLS ABOUT 100 AMPS AND THE 1200 TON PULLS 600 AMPS. ON TOP OF THESE ARE OVERHEAD CRANES, AND PLANT LIGHTING. IF THE CODE IS TO RATE THE LOADS AT 125% OF PEAK CURRENT, WON'T THE 2000 AMP SWITCHGEAR BE INSUFFICIENT? THE MAINTENANCE DIRECTOR IS UNDER THE OPINION THAT WE JUST NEED TO TAKE THE LOAD OF THE MACHINERY WHEN IT IS RUNNING TO RATE THE SERVICE, THEREFORE THE 2000 AMP THAT WE HAVE NOW IS SUFFICIENT. I DISAGREE AND I WONDER WHO IS RIGHT?
additionally our current buss plug going to this area is 1200 amps feeding a 1200 amp i line panel
the current machinery running off this panel have machine ratings of 400amps, 400amps, 100amps,5@ 20amps, 1@ 30 and 50 amps doesn't section 430 say
that the feeder circuit has to rated at machine rating and not running draw.
[ June 06, 2003, 09:30 AM: Message edited by: mopar ]
additionally our current buss plug going to this area is 1200 amps feeding a 1200 amp i line panel
the current machinery running off this panel have machine ratings of 400amps, 400amps, 100amps,5@ 20amps, 1@ 30 and 50 amps doesn't section 430 say
that the feeder circuit has to rated at machine rating and not running draw.
[ June 06, 2003, 09:30 AM: Message edited by: mopar ]