POLYKTIIYLEXE CABLE SHEATH THICKNESS 



565 



PROBE TOP VIEW ^-ESTIMATED EFFECTIVE AREA 



PROJECTED SIZE-^^. ^ ^^ AVERAGED BY TEST SET 



'^(^^ 



SPOT 



MEASUREMENT ----3 

 BY MICROMETER 



^ FRINGE LINKAGE 



■■. \_ MAJOR LINKAGE -^ -- 



Fig. 6— Thickness measured hy direct calibration; spot hy micrometer- 

 urea by capacitance, ictti, 



-FLOODING 



PLATE (ESTIMATED LOCATION 

 OF EFFECTIVE RESULT OF 

 CORRUGATION PLATE 



EXCESS FLOOD 



NO FLOOD 



POLYETHYLENE 



J'iR. 7— Iv|ii:il Iliickiicsses. (iillcrcnt capacitances. 



