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Hi All, I’m after some advice. I’ll cut to the chase but I can give more detail if needed. A 400A sub main supply needs to be ran 100m, a pretty direct route on ladder tray. Instead of one large cable (I think it’s 240mm), I was looking into running parallel cables instead. I’ve not done this before hence why I’m after the advice, but as far as I know as long as the conductors are identical in type and lefty’s etc then they’ll share the 400A between them, so I just need two multicore SWA’s rated for 200A each. So that’d be 2x 70mm 4-Cores and join them both ends. But my two questions are as follows
1) Would the volt drop calculation work the same way? Will I just put 200A as the design current for each of the two formulas as in theory the 400A would be share between to two? I did this earlier and I think I had to up them to 95’s.
2) Besides the CCC & VD, is there anything else that needs to be taken into consideration when running parallels?
Please bare in mind that this will most likely be put to an estimator as it’s not really my job to design the cable calc as I’m more on the tools, but this is more for my benefit for curiosity and so I know for the futures. All the cable calc tool I’ve found online don’t give the option to add parallels into the equation.
Your advice would be appreciated, thanks
1) Would the volt drop calculation work the same way? Will I just put 200A as the design current for each of the two formulas as in theory the 400A would be share between to two? I did this earlier and I think I had to up them to 95’s.
2) Besides the CCC & VD, is there anything else that needs to be taken into consideration when running parallels?
Please bare in mind that this will most likely be put to an estimator as it’s not really my job to design the cable calc as I’m more on the tools, but this is more for my benefit for curiosity and so I know for the futures. All the cable calc tool I’ve found online don’t give the option to add parallels into the equation.
Your advice would be appreciated, thanks