What does DGE stand for after someones name?

Does an ac unit need a neutral wire? What is the calculated load for an electric range rated at 16 kw? How many watts can 16 gauge stranded wire carry? How do you reduce voltage in a circuit? What affect does a changing magnetic field strength have on an ac generator power output? Where do you put the multimeter leads when you test a Molex connector? Can a 5-15p plug be used in a 5-20p socket. I have bought new equipment that uses 5-20p. If I rewire to support it will the socket be able to be used with 5-15 plugs or will it be only for 5-20? What is relation between power factor and phase sequence? What wire gauge is needed for a single phase 60 amp circuit? What is the efficiency of a tidal power plant? What is the advantages of 7400 series IC? Which jobs use electromagnets? What is the hermetically sealed transformer? What is the tonnage of temp star model NFCP4800C1? How many amps 400 mcm? How many watts load can you use with a 30amp trailer? How does a bistable circuit work? What is a stiff bias? What size generator for a 600 amp service? Who is Offset?