howardrichman
Senior Member
I'm installing feeder conductors for a agricultural barn from a residence 355 ft. to panel in barn. I've calculated approx. 7.5-9KW loads for tub heaters, heat lamps, general lighting and outlets. I'd need 40 amps but will supply at least 50 amps to be safe for any future loads. Using aluminum; I'm calculated voltage drop by using a common formula by DR Watts; using the conductors resistance, distance, and amperage. According to calculations, I'd need either #1 or 2 XHHW AL, depending on what an acceptable E drop should be. To my knowledge, there are no compressor or motor loads. With #1 alum. I've calculated approx. 4.5V drop for 50 amps. Could I safely get by using #2 Alum. ? What's an acceptable E drop for a sub panel feeding general loads?
HR...
HR...