Williams, Noel <br/><br/>
Limited energy systems :  a guide to alarm, signaling, remote-control, and communications circuits / 
Noel Williams 
 - Quincy, MA :  NFPA,  2002 
 - vi, 298 p. :  ill. ;  25 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0877655197 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric circuits<br/>Electric engineering--Safety regulations<br/>Remote control<br/>Fire alarms<br/>Electric cables<br/>Telecommunication systems