UL1993
在UL1993中CLAUSE 5.3.2a polymeric material used to enclose electrical parts shall have a Relative Thermal Index(RTI), including electrical and mechanical ,with impact properties of at least the temperature measured during the temperature test of clasue 8.5, unless the measured temperature is less
than 65degree
请问上段最后应该 怎样理解 RTI 相对保证温度（包括机械和电子）
也就是说，要求证书上有这个温度。
但是如果温升测试时，这个外壳不超过65度，那么对于这个外壳的RTI没有要求。
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