Since the heat-shrinkable tube has good electrical properties, stability, solvent resistance, and impregnating resistance to the impregnating paint, its surface can also be marked with letters according to the motor design requirements, so it can be used for heat shrinking when designing the motor stator and its winding accessory lead wires. The tube replaces the traditional metal foil with easy to fall off and breaks, and is used as a lead wire identification system.

When designing the lead wire with the heat-shrinkable tube as the lead wire design, the shrinkage rate of the heat-shrinkable tube, the uniformity of the motor series of each series, and the factors that make the mark more conspicuous and beautiful should be taken into consideration; the radial size of the heat-shrinkable tube and the printing are specified. The logo letter and its color, heat shrink tube color.

When using the heat-shrinkable tube to design the wiring indication of the winding accessory, in addition to the design, the radial dimension of the heat-shrinkable tube of the winding accessory of the sheathed bushing and the respective colors should be specified. It is also required to put a TP on the heat-shrinkable tube of the thermistor lead-in wiring. Letter identification, marked with HE letter on the heat-shrinkable tube of the heater lead wire, marked with TC letter on the heat-shrinkable tube of the thermocouple lead wire, and marked with TB letter on the heat-shrinkable tube of the thermostat lead wire to better identify .

热缩管在电机中的密封防护

由于热缩管具有良好的电性能、稳定性、耐溶剂、耐浸渍漆腐蚀性，它的表面还可以按电机设计要求打上标识字母，所以在设计电机定子及其绕组附件引接线时可用热缩管代替传统的易脱落和易折断的金属铝片，做引接线标识系统。

用热缩管做引接线标识设计引接线时，应考虑到热缩管的收缩率、各系列电机标识统一，以及使标识更醒目、美观等因素；具体规定热缩管的径向尺寸、打印的标识字母及其颜色、热缩管颜色。

用热缩管设计绕组附件引接线标识时，除了设计时应具体规定穿套的绕组附件引接线热缩管径向尺寸、各自颜色外，还要求在热敏电阻引接线热缩管上打上TP字母标识，在加热器引接线热缩管上打上HE字母标识，在热电偶引接线热缩管上打上TC字母标识，在恒温器引接线热缩管上打上TB字母标识等，以更利于识别。