UL1993對使用熔斷電阻器的測試要求
熔斷電阻器（Fusing resistor）一般會用在LED燈泡或LED驅動器之中以作保護。
根據UL1993 CLAUSE 6.4.5(CRD)，使用這類Fusing resistor時，有機會要做一個Limited Short Circuit test和Overload Test。
下面是相關的標準條文：
UL1993：6.4.5 A fusing resistor used for thermal protection shall comply with UL1412 or the requirements for CAN/CSA-C22.2 No. 60065-03 (R2008) or the requirements of NMX-J-578-ANCE. Testing shall include the Limited Short Circuit test while installed in the application, unless the test was previously conducted in accordance with UL1412 or CSA C22.2 No.256, using a 20 A test circuit with a 200 A short circuit capacity. If a clearance to combustible materials was used during the Overload test, as permitted in UL1412, the clearance shall be maintained or, the Overload test shall be conducted while the resistor is installed in the application.
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