How Do I Seal Parallel Wires?

Question:  How do I seal up parallel, touching wires when dealing with a tap?

Answer:  It is probably a lot easier than you think.  Raychem's CRSM is designed for applications exactly like that.  Here is a diagram of what the tap looks like after installation:

Notice the parallel wires to the left

In this case, the CRSM-CT includes (as one of the components) a sealant strip that is wrapped (in a figure-8 pattern around and through the two wires that are touching.  This (along with the adhesive of the CRSM-CT shrink sleeve) acts to encapsulate that section of the two wires and protect the connection.

CRSM Cable Repair Sleeves

     CRSM (Cable Repair Sleeves) are a multi-function heat shrink sleeve system used for a wide variety of cable repairs and low (1000 volt) splicing.  Utilizing a rail and channel mechanical closure system (which has been around since the 1960's), this product utilizes a high expansion backing and a thick adhesive sealant to cover many, many varieties of electrical repair/splice requirement.

     CRSM was invented in the 1970's.  Some might read that and think "wow; what an ancient technology; surely there is something newer out there."  Others (like me) would look at that and say "wow - 40 years of use and this product is still a leader in its field.  If there were problems with this product; they would certainly have been discovered by now."

     This product is available in a number of different sizes and widths.  The nomenclature is as follows:  the first number is the supplied ID of the tube (once the rail and channel is in place).  The second number is the fully recovered ID of the shrink sleeve.  The third number is the 'length' (some would say width) of the tube - or the coverage of the sleeve along the cable. 

Standard Sizes:

CRSM 34/10-200
CRSM 34/10-1200

CRSM 53/13-200

CRSM 53/13-1200

CRSM 84/20-750

CRSM 84/20-1200

CRSM 107/29-1000

CRSM 107/29-1200

CRSM 143/36-1200

CRSM 198/55-1200

Call or email today for pricing:  936/321-3333 or stacey@jsicoatings.com

What is Copper Tape Shield Cable?

     Most medium voltage cable is shielded some how.  One of the methods for shielding the cable is to utilize a copper table (can also be aluminum). As I've said elsewhere, if a cable has a copper tape shield, then it is beyond important that any splice simulate a copper shield as well.  You do not want to 'lose' hundreds of feet of wire because one foot splice wasn't properly completed!