2021年11月1日起，UL8750更新条款将正式实行！

2021年11月1日起，UL8750更新条款将正式实行，请见如下是一些对产品影响较大的UL8750更新的条款解读。

条款1：SUPPLEMENT SE–REQUIREMENTS FOR CLASS P LED DRIVERS

SE5.3 A driver with field-wiring leads, field-wiring terminals, or push-in terminals shall be marked “Use only within an enclosure” or equivalent. The marking may be provided in an installation guide or equivalent accompanying document.

带有现场接线、现场接端子或者推入式端子的CLASS P LED 驱动需要标上“Use only within an enclosure”或等效标签。标签可以印在产品或者说明书上。

 条款2:  6.7 Polymeric potting compound

6.7.3 Polymeric potting compound that can touch any part of the insulation system of a transformer shall be tested in accordance with Supplement SA– Substitutions or Modification to an Electrical Insulation System in the Standard for Systems of Insulating Materials–General, UL 1446.
Exception No.1: This test does not apply if the transformer is not used for the mitigation of the risk of electric shock or is not used to separate Class 2 circuits or LVLE circuits from hazardous circuits.
Exception No.2: This test does not apply if the transformer insulation system already includes the potting.
Exception No.3: This test does not apply if the insulation system is used up to the temperature permitted for class 105 (A) according to Table 8.1 of this standard.
Exception No.4: This test does not apply for thermosetting potting compounds where the insulation system of a transformer utilizes a thermoset varnish which completely encloses the coil windings- preventing the potting compound from making contact with the winding wire insulation.

灌封胶如果接触到变压器绝缘系统任何部分，就需要根据Supplement SA–Substitutions or Modification to an Electrical Insulation System in the Standard for Systems of Insulating Materials–General, UL 1446 进行测试。

例外1：如果变压器不用于减轻电击风险或不用于将Class 2电路或LVLE电路与危险电路分开，则该测试不适用。

例外2：如果变压器绝缘系统已经包括灌封胶，则该测试不适用。

例外3：如果绝缘系统的使用温度达到本标准表8.1规定的105(A)级允许的温度，则该测试不适用。

例外4：如果变压器的绝缘系统使用热固性清漆，并完全包围绕组线防止热固性灌封胶与绕组绝缘接触，则该测试不适用。

条款3：7.2A.2 Grounding

7.2A.2.7 When the path between the grounding connection means and the ground termination point in the product includes PWB traces, the construction is to be evaluated per the bonding conductor tests in 8.23.

不接地连接装置和接地端接点之间的路径包括PWB走线时，需要评估8.23 bonding conductor tests。

条款4：SUPPLEMENT SF–LED EQUIPMENT WITH WIRED CONTROL CIRCUITS

LED设备中用於控制功率、光输出特性、操作或性能数据传输等的控制电路需要附合SF 的要求。

Marking requirement

1. Identification of the terminals or lead wires for control circuits, Identification of the intended industry or proprietary protocols;

2. Device wired control circuit marked ‘Class 2’;

3. “CAUTION: More than one power supply present” or equivalent;

4. “Notice: This control circuit is not isolated - see installation instructions” or equivalent;

5. Installation instructions.

Marking 要求

1. 控制线路端子或电线识别，行业或专有协定识别；

2. “Class 2”如控制线路已评估Class 2或外接Class 2电源；

3. “CAUTION: More than one power supply present” 如控制线路是外接非Class 2电源；

4. “Notice: This control circuit is not isolated - see installation instructions” 如控制电路是非隔离并满足豁免条款SF3.1；

5. 安装说明。

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