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indoor steel plant (extremely dirty and dusty) 300 VAC not sure Canada why is it bare? because it's a steel mill and the water cooled bus is up high. just worried about arcing bus out if the structure becomes grounded.

i have a question regarding minimum clearance between a bare conductor and structural steel with potential of ground. The voltage is 300 VAC and the current is approximately 25kA @ 60hz. What is a safe distance between ground and this conductor?

i think i figured it out. thanks for the help.

Ok...This is the diagram with more detail. I apologize for the confusion thus far. the red dashed conductors are water cooled copper tubes. We calculate that water cooled bus can pass 3800amps per sq. in. in DC. attached is a detailed diagram of the system...

the rectifiers are run in parallel to output the 70kA @ 100vdc. is my terminology not correct by stating the bus is run in parallel? did you look at the sketch?

sorry about not making this clear from the start. i just re-read my first post and i failed to mention anything about parallel. i also cannot give too much info on this, but yes, this is an electrolysis type plant. can you show me how you came up with that figure?

HERE IS A GENERAL OVER VIEW OF THE SYSTEMhttp://files.engineering.com/getfile.aspx?folder=3cec1b4a-77c9-4d95-be1b-c27545eb3805&file=DIAGRAM.JPG

70kA is fully load current 24/7. Customer shows 3.5v drop. i used so many different k factors and never got close to 3.5. maybe i should clarify just in case it's not clear. 2 water cooled conductors running in parallel for a total of 450' (450'/conductor)

The drop should be I*?*len/area I=70000 ?=??? (does this factor include the mat'l? this is where i get confused...i think) L=450 A=in sq. in? cir mil?

100 v(dc)total output from rect/trans i need to figure out the total resistance of the conductor across 450 ft. to calculate the total voltage drop of the circuit. there are are 2 conductors in parallel carrying 70kA @ 100vdc. i'm having problems figuring the length into the equation. i...

hello, i'm having a hard time figuring out the actual voltage drop of a DC circuit and i think it's due to a bad calculation with the resistance. amps=70kA VDC=100 L=450 ft Conductor is 7.50" o.d x 5.5" i.d. water cooled bus. sufficient water flow through out circuit on multiple inlet...

when i update an assembly or even when i shut down pro-e w/f 5.0, my drawing views move what seem in various and random directions. does anyone know why this happens and how do i prevent it from happening in the future? this is rather annoying.