Allan, David. <br/><br/>
Electrical installations :  NVQ and technical certificate / 
David Allan and John Blaus. 
 - 2nd ed. 
 - London  :  Heinemann,  c2008. 
 - vi, 351 p. :  col.ill. ;  30 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9780435467043 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric apparatus and appliances--Installations.<br/>Electric equipment.