34 



PRINCIPLES OF ELECTRICAL DESIGN 



so common in electrical handbooks and textbooks, that par- 

 ticulars of sizes not here included can generally be obtained 

 without difficulty. 



The Brown and Sharp gage is commonly used in America, 

 while the legal standard gage (S.W.G.) which has been adopted 

 by the Engineering Standards Committe is used almost with- 

 out exception by electrical engineers in England. In using the 

 accompanying tables, reference should always be made to the 

 heading, to ensure that the figures relate to the required wire 

 gage. 



WIRE TABLE, BROWN AND SHARP GAGE, COPPER 



1 A variation in resistance up to 2 per cent, increase on the calculated values for pure 

 copper is generally allowed. 



