38 



PRINCIPLES OF ELECTRICAL DESIGN 



taken up by the cotton covering would be excessive in propor- 

 tion to the cross-section of copper. When great economy of 

 space is necessary, enamelled wire may be used. This is simply 

 bare copper wire on which a thin coating of flexible enamel has 

 been applied by a special process. Enamelled wire may often 

 be used to advantage, especially in connection with the very 

 small diameters; but there is always the possibility of contact 

 between adjacent wires at abnormally high temperatures, and in 



BELDENAMEL WIRE DATA 



