On the low-quality wire and cable identification method

On the low-quality wire and cable identification method
 2011-6-30 22:02:14
 First, the formulas

 Look like label printing, illegible address unknown.
 Hand twister insulation, fade, out of the word poor quality.
 Then nail planning, pinch line, designated under the peel line general.
 Repeated bending insulated wire, three to four times on the break.
 Fire ignited insulation, leave out line of fire ignition.
 Commonly used in aluminum and copper conductors, color, luster dimmed light.
 Small amount of inner and outer diameters, the weight to see the softening.

 Second, the formulas to explain
 1, look like label printing, illegible address unknown. See the label is printed on the jacket and insulation words, if there are typos or printing shades, vague words, to attract attention.
 2, hand twister insulation, fade, out of the word poor quality. Rub with your fingers is insulated jacket, insulated wire some bad skin is easy to fade, especially the red line will face this problem, by rubbing a finger on the left after the line skin color or print the word line to be erased on the skin of generally poor quality lines.
 3, and then nail draw, pinch line, designated under the peel line general. Is designated with a nail, insulated pinch the skin, can draw, the pinch off one of the generally poor quality lines.
 4, repeated bending insulated wire, three to four times on the break. Refers to the repeated bending of the wire insulation, wire insulation is generally low-quality material is poor, bending 3 to 4 times the insulation layer will break.
 5, the fire ignited insulation, leave out line of fire ignition. Insulation is ignited and left to spontaneous combustion after the flame is inferior line.
 6, used aluminum and copper conductors, color, luster dimmed light. Is the core to see the color line, poor-quality line of dark colors and no metallic luster.
 7, small amount of inner and outer diameters, the weight to see the softening. Is, if the above six methods can not be determined, but also can measure the diameter of insulated wire and cable core diameter tolerance is ± 10%, the measured value if more than the allowable error, basically low-quality insulated wire.