I have a 100 amp 30 pole 3 phase 4w main 208/120 lighting panel. Fed by a 30 KVA transformer. This is an industrial application. Can I install a 3 phase 100 amp subpanel or should I go with a 60 amp ? What is the code on this and what is the article in the NEC?
For any of you electrical equipment distibutors or engineers. Does square D maunufacture 20 amp tandem single pole breakers for a NQOB panelboard ? Ravenjoe
Does anyone know of an instrument on the market that can be used to determine the lenth of a cable. I have to re-design a PLC remote I/O system and I am limited to 10,000 feet per channel. This is a large sytem and remote racks are very far apart. I need to determine the lenth of my run before I...
I have been asked a particular question manys times and have had a hard time explaining it. So maybe some of you bright gentlemen or ladies can help me better articulate my answer. In a single phase 240 volt load. I am using a 2 pole 30 amp breaker to supply the load. Now, if I have 30 amps per...
I have a question about breakers. If I have a 20 amp 3 pole breaker. On a 208v 3 phase 4 wire load. Do I have 20 amps per phase capacity to ground or 20 amps total phase to phase ? Example : I am running a 3 phase 208v 4 wire to 3 1000w heaters. 1 heater per phase and a nuetral. The heaters are...
