标题: UL1598 Junction box接线盒open hole 开孔问题 [打印本页] 作者: 信思哲 时间: 2019-7-31 19:00 标题: UL1598 Junction box接线盒open hole 开孔问题 12.3.8 An open hole in a box, such as a mounting-screw hole, shall have no dimension larger than 6.7 mm (0.265 in), except that a pry out hole or slot may be provided in a knockout for 1 in or smaller trade size conduit, provided that the area of the hole or slot is no more than 26 mm2 (0.040 in2). 8 w' G g( N8 m: x接线盒的开孔，例如螺丝孔，尺寸不得大于6.7 mm，除非为1英寸或者更小的规格型号电工管的敲落空上可以提供一个pryout hole或者槽，所述空或槽的面积不超过26mm2 % z/ {" V% M7 o" t# m4 l 2 \5 E% D7 L8 o: X6 \, {4 C两个疑惑& x* E G5 O: f0 s
1.目前感觉这个6.7mm的要求太苛刻，实际市场上很难做到，仅仅对于圆形孔还好说，但是难免有些长条的缝，就很难满足，各位同仁怎么处理的?/ V8 ? x6 o6 K% ^6 }' _
2.后半部分的pryout hole或者槽是指敲落片如图部分吗？+ x2 [, I o* ^0 K1 v 作者: fasten 时间: 2019-7-31 19:10
即便是敲落孔还有尺寸限制：' _/ v9 n" D% _: ~# Q
a pry out hole or slot may be provided in a knockout for 1 in or smaller trade size conduit ; G7 A+ k* u) {: Y. f! O" t7 X! I" G
1英寸以下的condiut敲落孔作者: 信思哲 时间: 2019-8-1 15:34
fasten 发表于 2019-7-31 19:10; e) g; ?% O8 z0 m$ e2 |' Y
即便是敲落孔还有尺寸限制： * ?; D/ G0 l8 a4 p' b2 qa pry out hole or slot may be provided in a knockout for 1 in or smaller ...