Electricity for refrigeration, heating and air conditioning  alternating current, power distribution, and voltage systems  [video recording] : 

 - Clifton Park, NY:  Thomson/Delmar Learning,  2003 
 - 1 video cassette (18 min. 32 sec.): sd., col.;  1 cm.;  1 instructor's guide 
 - Electricity for refrigeration, heating and air conditioning; set 2 (1) .
<br/><br/> VID 020 
<br/><br/><label>ISBN: </label>1401817076 (set) 140181705X (Instructor's guide) 1401817084 (videocassette) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric currents, Alternating<br/>Electric power distribution<br/>Voltage regulators