Posted by buickanddeere on May 29, 2011 at 06:16:38 from (173.243.46.130):
In Reply to: Appropriate fusing? posted by RayP(MI) on May 29, 2011 at 05:12:44:
There is sometimes confusion regarding motor protection. There is short circuit protection which is just protection against a near or dead short. Fuses are breakers are sized well above actual wire current capacity. IIRC as I"m on the road away from my code book. Something like 300% for ordinary fuses and 175% for breakers and slow blow D fuses. There is thermal protection to protect electric motors from overloads. Usually a 115% heater on the motor starter. or built into a small motor"s junction box. 30amp fast blow P fuse or 20amp slow blow D fuse. Has anything happened to drop voltage to the pump while starting? Has the pressure switch contacts started arcing? 2 wire or 3 wire pump?
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Today's Featured Article - Harvestin Hay: The Early Years (Part 2) - by Pat Browning. The summer of 1950 was the start of a new era in farming for our family. I was thirteen, and Kathy (my oldest sister) was seven. At this age, I believed tractor farming was the only way, hot stuff -- and given a chance I probably would have used the tractor, Dad's first, a 1936 Model "A" John Deere, to go bring in the cows! And I think Dad was ready for some automation too. And so it was that we acquired a good, used J. I. Case, wire tie hay baler. In addition to a person to drive th
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