Odd vs Even Single Feeder runs
Odd vs Even Single Feeder runs
(OP)
I came up to this interesting question yesterday and it got me curious...
Suppose I require a ~1500A feeder and I have flexibility of choosing either 3x1c-#350/ph or 4x1c#250/ph. Which one would be the better practical choice? Is it better to always go with even runs for voltage balancing? How about if the run is short, say less than 25m... would it matter?
I did a quick capital cost calculation and the #350 was marginally more expensive (~$2.5k more expensive for a 25m run.) However since 350 MCM only requires 9 runs instead of 12 (ie cheaper installation cost), would that bias the decision?
Note, the 1500A ampacity is just a number for example illustration purpose. My question isn't about cable ampacity question. My question is directed on the pros/cons of choosing even single cable feeder runs vs odd single cable runs.
Suppose I require a ~1500A feeder and I have flexibility of choosing either 3x1c-#350/ph or 4x1c#250/ph. Which one would be the better practical choice? Is it better to always go with even runs for voltage balancing? How about if the run is short, say less than 25m... would it matter?
I did a quick capital cost calculation and the #350 was marginally more expensive (~$2.5k more expensive for a 25m run.) However since 350 MCM only requires 9 runs instead of 12 (ie cheaper installation cost), would that bias the decision?
Note, the 1500A ampacity is just a number for example illustration purpose. My question isn't about cable ampacity question. My question is directed on the pros/cons of choosing even single cable feeder runs vs odd single cable runs.






RE: Odd vs Even Single Feeder runs