... with this standard GB/T18813-2002 standards, and provides the requirements for transformer copper, testing methods, inspection rules, marking, ... standard applies to copper wound transformer coil. Table 1 strip grades, status, and specificationsTrademarkSupply StatusSpecificationsThicknessWidthTU1,T2M0.10~0.50 ... strip, the test results for reference only. TRANSFORMER AND ELECTRICAL CABLE COPPER TAPE