Tables from the national electrical safety code :  An american national standard :  Secretariat institute of electrical and electronics engineers :  Approved june 26, 1989 american national standards institute 

 - 67 páginas 
 - Tables/ansi ;  c2, 1990 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ingeniería eléctrica--Medidas de seguridad--Normas--Estados Unidos
<br/><br/><label>LC Class. No.: </label>TK152  / A543