电光源的安全要求

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normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 113.55pt; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-char-indent-count: 8.08" align=left> 电光源的安全要求GB7248—87　

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>本标准适用于各种白炽光源和气体放电光源。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>1.名词术语

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>1.1 额定电压

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>电光源上标明的电压或电压范围。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>1.2 额定电流

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>电光源上标明的电流。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>1.3 额定功率

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>电光源上标明的功率。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>1.4 灯头温升

normal style="MARGIN: 0cm 0cm 0pt 15.1pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>按照GB7250 — 87《灯头温升的测量方法》测得的，安装在灯泡上的标准试验灯座上的表面温升。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>1.5 初始扭力矩

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>电光源在进行初始老炼后施加在灯的壳体和灯头之间的扭力矩。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>1.6 寿终扭力矩

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>电光源在寿命终了时施加在灯的壳体和灯头之间的扭力矩。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>1.7 带电体

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>在正常使用时可能引起触电的带电零件。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>2.安全要求

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>2.1 标志

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>nth="12" Day="30" IsLunarDate="False" IsROCDate="False">2.1.1 每个电光源上应注有下列清晰而牢固的标志：

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>a. 来源标志（制造厂名称或商标）；

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>b. 代表电光源额定电压、额定电流、额定功率或其它额定参数的电光源型号。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>nth="12" Day="30" IsLunarDate="False" IsROCDate="False">2.1.2 在电光源的外包装盒或外包装箱上应注明：

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>a. 来源标志；

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>b. 电光源型号；

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>c. 电光源的燃点位置（如有限制时）

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>d. 安全运输标志。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>2.2 防触电性能

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>电光源灯头上与带电体绝缘的金属壳体不应带电。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>2.3 爬电距离和电气间隙

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>nth="12" Day="30" IsLunarDate="False" IsROCDate="False">2.3.1 灯头的壳体与带电体之间和不同极性的带电体之间的爬电距离不应小于表1规定。

normal style="MARGIN: 0cm 0cm 0pt 38.65pt; TEXT-INDENT: 147pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>表 1 mm

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>灯头

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>B15d

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>B22d

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>E5

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>E10

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>E14

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>E27

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>E40

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>G5

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>G13

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>G23

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>爬电距离

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>2.5

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>2.5

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>0.8

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>2

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>3

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>3

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>5

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>1.5

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>2.5

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>3

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normal style="MARGIN: 0cm 0cm 0pt 26.25pt; TEXT-INDENT: -26.25pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>nth="12" Day="30" IsLunarDate="False" IsROCDate="False">2.3.2 灯头接触片上的焊锡或导线露头与灯头壳体或带电体间的电气间隙不应小于value="1" UnitName="mm" w:st="on">1mm 。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>2.4 绝缘电阻

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>B15d 、B22d、 E27、 E40和 G13 型灯头的绝缘电阻在正常气候下不应低于value="50" UnitName="m" w:st="on">50M Ω，在潮湿气候下不应低于value="2" UnitName="m" w:st="on">2 M Ω。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>注：①其它型号灯头的绝缘电阻值特定。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 26.25pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>②正常气候条件系指空气温度为25± value="5" UnitName="℃" w:st="on">5℃，相对湿度为50% ～80% 的环境条件。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 26.25pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>③潮湿气候条件系指空气湿度为40± value="2" UnitName="℃" w:st="on">2℃，相对湿度为90％～95% 的环境条件。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>2.5 灯头温升

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>nth="12" Day="30" IsLunarDate="False" IsROCDate="False">2.5.1 一般照明用的白炽灯泡的平均温升不应超过表2规定。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 168pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>表 2

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center> 灯泡功率，

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>W

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>平均灯头温升（最大值），℃

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>E14

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>E27

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>E15d

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>E22d

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>40

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>130

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>140

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>135

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>140

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>60

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>140

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>120

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>145

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>125

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>100

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>－

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>130

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>－

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>135

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>150

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>－

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>130

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>－

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>135

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>200

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>－

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>130

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>－

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>－

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>300

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>－

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>130

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>－

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>－

normal style="MARGIN: 0cm 0cm 0pt 26.25pt; TEXT-INDENT: -26.25pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left> 注：① 一般照明用的白炽灯泡包括单螺旋和双螺旋普通照明灯泡，充氪照明灯泡、磨砂、乳白照明灯泡和装饰灯泡。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left> ② 特种白炽灯泡和气体放电灯的灯头温升特定。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>2.6 扭力矩

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left> 电光源应能承受表3的扭力矩作用而不松动。

normal style="MARGIN: 0cm 0cm 0pt 62.7pt; TEXT-INDENT: 110.25pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>表 3 N/m

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>灯头型号

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>B15d

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>B22d

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>E14

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>E27

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>E40

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>G5

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>G10

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>G13

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>扭力矩

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>初始扭力

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>1.50

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>3.0

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>1.50

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>3.0

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>5.0

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>0.6

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>0.2

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>1.2

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>寿终扭力

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>1.05

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>1.5

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>1.05

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>1.5

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>2.5

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>-

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>-

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: center; mso-pagination: widow-orphan" align=center>-

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>用机械结构连接的灯头，允许灯头与玻壳间有轻微的相对位移。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>2.7 熔断保险丝

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>60~300W双螺旋普通照明灯泡内应装有熔断保险丝。当灯泡产生弧光放电时，熔断保险丝应能使灯泡断路而不破坏玻璃壳的完整性。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>2.8 防灯内短路

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>nth="12" Day="30" IsLunarDate="False" IsROCDate="False">2.8.1 白炽光源内不得有能够引起灯丝短路或损坏玻壳的自由移动体。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>nth="12" Day="30" IsLunarDate="False" IsROCDate="False">2.8.2 电光源的外导丝间不得短路，且不应与灯头壳体搭接。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>2.9 防爆罩

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left> 超高压气体放电灯应带有防止运输和贮存中产生爆炸的安全防护罩。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left> 注：本条要求不适用于超高压汞灯。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>2.10 耐热性

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>电光源外部的、用作防触电或固定通电部件的绝缘体应具有足够的耐热性能。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>注：玻璃和陶瓷除外。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>2.11 防火和防燃

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 15.75pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>电光源外部的、用作防触电或固定通电部件的绝缘体应能防火和防燃。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 10.5pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>注：玻璃和陶瓷除外。

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>3 试验方法

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left> （略）

normal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left>4 验收规则

normal style="MARGIN: 0cm 0cm 0pt"> （略）