灯具内电线末端上焊锡是否可以接受？
有人判不合格，从60598下面的条款看来是似乎可以接受的：
5.2.13 The ends of flexible stranded conductors may be tinned, but
shall not have additional
solder applied, unless a means is provided of ensuring that clamped
connections cannot work
loose owing to cold flow of the solder (see Figure 28).
NOTE This requirement is met when spring terminals are used.
Securing the clamping screws is not an adequate
means of preventing the connection of soldered strands from working
loose owing to cold flow of the solder
但实际上，
上锡只能上在端部上一点,不能整个都搪锡,因为锡有个特性就是随着温度变化特性会变,而且这个温度范围在-20-+40之间.
如果接线端子是螺钉固定的话，线头一般要包铜的。因为螺钉压在焊锡部分，当温度变化时锡会变成锡灰,导致对导线连接处的可靠性产生影响,如果线从接线端子中滑出则会导致爬电距离或其他危险产生。
但是弹簧接线端子的导线允许上锡，因为弹簧可以补偿焊锡的冷流动。
