标题: 关於UL153免温度测试问题 [打印本页] 作者: gzsl2009 时间: 2012-1-19 11:31 标题: 关於UL153免温度测试问题 关於UL153免温度测试问题：
47.2 Determination of temperature test-exempt status
47.2.1 The following steps are to be followed to determine when a portable luminaire complies with the temperature test exempt requirements:
a) Determine shade designation in accordance with 47.3;
b) Determine minimum lamp-to-shade spacings for shade designation, lampholder type and
wattage in accordance with 47.4; and
c) Determine minimum wire insulation temperature rating in accordance with 47.5.