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Why each toolbox wants a handful of jelly crimps

Jelly crimps galore!

Jelly crimps galore!

Adrian Kingsley-Hughes/ZDNET

Common readers will know that I really like the Wago lever nuts for making stable, dependable connections in home mains voltage wiring. However one other connector I discover myself utilizing quite a bit is the jelly crimp. In actual fact, I used some immediately to repair some damaged wires in a doorbell.

Jelly crimps are the mainstay of telecom installations and restore (not less than right here within the U.Ok.). I used to be launched to them a few years in the past by an engineer who gave me a handful of them, and ever since I have been hooked.

Additionally: Find out how to strip wires like a professional (and my must-have instruments) 

These connectors come below numerous completely different names, however jelly crimps is what they’re finest generally known as. 

The “jelly” bit within the title comes from the truth that the ends are filled with a dielectric silicone sealant that each provides further insulation and in addition makes the connection weatherproof.

They arrive in two-way (known as UY) or three-way configurations (known as UR), relying on whether or not you wish to join two or three wires collectively, and so they have been particularly designed for becoming a member of stable core copper or aluminum phone and communications wires.

Additionally: Find out how to use heat-shrink butt connectors to repair damaged wires

Together with the UY and UR configuration variations, there’s additionally completely different sizes relying on the outer diameter of the wire you are going to be connecting utilizing the jelly crimp. Common UR and UY are for thinner 22-26 awg wires with an insulation outer diameter of 1.52mm, whereas the UY2 and UR2 sizes accommodates the thicker 19-26 awg wires with a most insulation outer diameter of two.08mm.

A UY2 jelly crimp that is oozing a little bit of the silicone gel onto my arms

Adrian Kingsley-Hughes/ZDNET

You will discover numerous completely different manufacturers on the market, and they are often hit or miss, and I’ve seen low cost ones disintegrate or not include any gel. I’ve a supply within the telecom enterprise that retains me provided, however in case you’re having to purchase them on-line, I like to recommend going for the 3M Scotchlok model. 

I discover the two-way ones to be essentially the most helpful, with a 100 pack of UY being sufficient to cater for my wants.  

The crimp is full of a non-conductive jelly that waterproofs the joint

Adrian Kingsley-Hughes/ZDNET

They’re useless straightforward to make use of. 

You chop the cable, poke the ends in all the way in which (no have to strip the insulation), and squeeze the button to snap them down and chew by the cable.

Additionally: Find out how to solder: Instruments, ideas, and tips to get you began the straightforward approach

That straightforward!

Their major use is on phone wiring, however I’ve additionally used them on alarm programs, doorbells, audio system, and different low-voltage purposes. These connectors can deal with as much as 50V, so do not use them on mains voltage in case somebody — presumably you — dies. 

Jelly crimps are nice for low voltage purposes, right here carrying 12V to a fan

Adrian Kingsley-Hughes/ZDNET

The connections are extremely dependable, and so long as they don’t seem to be submerged in water, they’ll final for many years (and even submerged ones have a protracted life, in my expertise).

Squeezing a jelly crimp with a Knipex waterpump pliers

Adrian Kingsley-Hughes/ZDNET

There’s a particular device for doing the squeezing that you could choose up for $15 to do the job.

A totally crimped jelly crimp

Adrian Kingsley-Hughes/ZDNET

Did I point out that they’re extremely satisfying to “pop”?

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