UPS remote battery feeder calc.

[GSXR600]

I have a 180 KVA UPS system. THe batteries are remoted to the other side of the the about 10' from the UPS. How would i figure out what size feeder should go between the ups and the batteries

 

[mxslick]

Best bet is to contact the UPS manufacturer. They will know exactly what size wire will do the job safely and keep the warranty on the unit intact.

Some even have that information available online.

 

[GSXR600]

Does anyone know of a calculation for future information

 

[ron]

Match the ampacity of the battery output circuit breaker.

 

[brian john]

The UPS has a maximum DC bus rating that is the maximum DC draw al the low voltage shut down use this number.

Remember that voltage drop is an issue as run time is based on the battery voltage, and VD in the cable will result in a shorter run time..

 

[GSXR600]

can you run positive and negative conductors of a DC circuit in the same conduit?

 

[brian john]

can you run positive and negative conductors of a dc circuit in the same conduit?

yes..............................................