AS型防短路电气绝缘衬套应用于知名家电线束器材

信诺华工业投资了9套防磨损衬套，几乎供应了美国各大电器附件及接头供应商。规格从5/16到2-1/2，几乎可以满足大部分电气安装需求。正是由于这种平时看起来很不起眼的小物件，也许在过去的若干年间，挽救了数以万计的生命和财产安全。

AS型绝缘衬套，是一种插入在金属护套和柔性铠装电缆的封闭电线之间的防短路套管，该柔性铠装电缆护套在其内表面上具有凹槽，具有大致中空管状的主体，以及附接到主体并可相对于主体移动的保持器，该保持器被配置为使得当插入套管时，电线抵靠在保持器上，或者保持器被压靠在金属护套的内壁上。在另一方面，本绝缘护套的特征作为一种防短路衬套，其主体在一端具有凸出外缘，并且在凸缘和管状主体之间具有加长拉片。

这些来自信诺华工业的聚乙烯醒目红色绝缘衬套可以有效防止电线安装在电线和铠装护套之间时受损。Sinohua的防短路套管通过保护穿过现场切割的柔性金属导管边缘的电线来提高安全性；绝缘，防止锐边损坏，以避免短路和和后期可能潜在发现的返工。

在很多人看起来似乎加装这个绝缘衬套似乎完全是多余的。那么，究竟是否需要安装防短路衬套？

防短路套管及其安规要求是电气电工论坛中的一个争论点。有些人激烈地说“是”，而另一些人则说“不，毫无意义”。曾经这是一个非常热点的话题，根据NEC电气规范第320.40节的规定，铠装电缆需要防短路套管或者同等功能的安防措施，其中明确规定“导体和铠装之间应提供绝缘套管或等效保护。对于MC电缆，规范未规定需要防短路衬套。因此，它们是可选的。

笔者曾经在在美国当地电气供应商的货架上，许多MC电缆卷的内侧都会有一个小塑料袋，里面装着醒目的红色防短路衬套，随时可以使用。当然，尽管一些安装操作人员把它们扔掉，一些人则把它们投入使用。正如这个世界已经很成熟的保险市场一样，这些绝缘衬套是给我们电路电器安全撑开了一把巨大的保护伞，让我们避免遭受重大的生命财产损失。

Anti-Short Bushings-also called "redheads"
these Polyethylene "Redheads" from Sinohua industries can prevent damage to wire installation when placed between the wire and armored sheath.Sinohua's Anti-Short Bushings promote safety by protecting wires passing through edges of flexible metal conduit cut in the field; insulating against damage from sharp edges to avoid short circuits and rework. UL Listed.

An anti-short bushing to be inserted between a metal sheath and an enclosed wire of a flexible armored cable of the kind whose sheath has a groove on its interior surface, has a generally tubular body, and a retainer attached to and movable relative to the body and configured so that, when the bushing is inserted, the wire bears against the retainer, and either the retainer is forced against the inner wall of the metal sheath, or the wire causes the retainer to seat in the groove. In another aspect, the invention features an anti-short bushing having a generally tubular body with a flange at one end and a ridge between the flange and the tubular body, configured so as to engage a cut edge of the cut end of the sheath.
 

Cross reference chart如下是一些欧美的知名友商型号参考表，我司均有模具。
SIZE    DESCRIPTION    ITEM #
5/16"    FLEX ANTISHORT BUSHING    HALEX 75400BP
3/8"    FLEX ANTISHORT BUSHING    HALEX 75401BP
7/16"    FLEX ANTISHORT BUSHING    HALEX 75402BP
1/2"    FLEX ANTISHORT BUSHING    HALEX 75403BP
3/4"    FLEX ANTISHORT BUSHING    HALEX 75404BP
5/16"    FLEX ANTISHORT BUSHING    HALEX 75400
3/8"    FLEX ANTISHORT BUSHING    HALEX 75401
7/16"    FLEX ANTISHORT BUSHING    HALEX 75402
1/2"    FLEX ANTISHORT BUSHING    HALEX 75403
3/4"    FLEX ANTISHORT BUSHING    HALEX 75404
arlington AS0,UPC code 18997105004,trade size 5/16"
arlington AS1,UPC code 18997105103,trade size 3/8"
arlington AS2,UPC code 18997105202,trade size 7/16"
arlington AS3,UPC code 18997105301,trade size 1/2"
arlington AS4,UPC code 18997105400,trade size 3/4"
arlington AS5,UPC code 18997060525,trade size 1"
arlington AS6,UPC code 18997060549,trade size 1-1/4"
arlington AS7,UPC code 18997060563,trade size 1-1/2"
arlington AS8,UPC code 18997060587,trade size 2'' to 2-1/2''
Cat. number and AWG size list:
THOMAS & BETTS 390 #14-2, #14-3, #12-2
THOMAS & BETTS 391 #14-4, #12-3, #6-1, and #4-1
THOMAS & BETTS 392 #12-4, #10-2, #10-3 and #2-1
THOMAS & BETTS 393 #10-4, #8-2, #8-3, and #1-1
THOMAS & BETTS 394 #8-4, #6-2, #6-3, #4-2, #4-3, and #6-4
ARMOR BUSHING, 7/16 IN-Essentra Components ASB2A
ARMOR BUSHING, 5/16 IN-Essentra Components ASB0A
ARMOR BUSHING, 3/8 IN-Essentra Components ASB1A
ARMOR BUSHING, 1/2 IN-Essentra Components ASB3A
ARMOR BUSHING, 3/4 IN-Essentra Components ASB4A
14/2, 14/3, 12/2, 12/3 HEYCO 2264 AB0
14/4, 6/1, 4/1 HEYCO 2265 AB1
12/4, 10/2, 10/3, 2/1 HEYCO 2266 AB2,HEYCO 2281 AB Orange*
10/4, 8/2, 8/3, 1/1 HEYCO 2267 AB3