I'm sizing cables for a particular piece of equipment however the datasheets only give me the maximum upstream OCPD for the piece of equipment and not the actual input current. It gives the max OCPD upstream as 40A.
The piece of equipment is a battery charger and gives an output continuous current of 30A.
As far as far as the current to use for sizing cables what would be the best method to select the current. I initially based it off 30A input current and said that 30A X 1.25 = 37.5A and the next size up allowed for the 40A breaker as listed. Therefore I would base my design off of an input current of 30A and a design current of 37.5A . Does this seem right or should I use 40A as the base input current?
The piece of equipment is a battery charger and gives an output continuous current of 30A.
As far as far as the current to use for sizing cables what would be the best method to select the current. I initially based it off 30A input current and said that 30A X 1.25 = 37.5A and the next size up allowed for the 40A breaker as listed. Therefore I would base my design off of an input current of 30A and a design current of 37.5A . Does this seem right or should I use 40A as the base input current?