Joining alarm cable

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Bit more advice would be welcome if any of you chaps have much experience with this......

Been running new alarm cables today but there are a couple of places what are very tricky as the original cabling was put in at the first fix stage of building by the looks of it. It would be great therefore if i could utilize a couple of the existing cables. I have belled them out and the continuity of all cores is sound so i would like to make a joint by soldering to some new cable and covering the joints with some small heatshrink, the joints would be made in a bit of small mini trunking (unavoidable).

Is soldering considered good enough? Im using EOL wiring so am just concerned about high resistance joints over time although im a pretty good solderer.

Incidently, got 1.08 ohms on a pair in the existing cable - with using EOL wiring, how does the panel account for the increased resistance from the cabling as i assumed its looking for a certain figure?

cheers
 
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Why not use something like these telephone cable splicing joiners
they are filled with silicone and seal when you crimp them
https://www.google.ie/search?q=telephone+splicing+joiners&biw=1280&bih=689&tbm=isch&imgil=45c-Kp5Opt3kLM%3A%3BABHPqwgOFkzQ-M%3Bhttp%253A%252F%252Fwww.ebay.co.uk%252Fitm%252F10-BT-VIRGIN-TELEPHONE-CABLE-WIRE-REPAIR-SPLICE-JOINER-%252F330376811318&source=iu&pf=m&fir=45c-Kp5Opt3kLM%3A%2CABHPqwgOFkzQ-M%2C_&usg=__GhEh0DosnLNwoAHKgajfb4S2TSU=&ved=0ahUKEwjniJyZserQAhWTOsAKHaebDCkQyjcILQ&ei=tlpMWOfVDZP1gAant7LIAg#imgrc=45c-Kp5Opt3kLM:

I have used them on alarm cables without issue
BTW 1.08 ohms is not that much when you consider that say a HKC alarm uses a 4k7 eol resistor
That is 4700 ohms or 4.7K
 
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Ill have a look at them geronimo. Was thinking solder because i have all the stuff ready to crack on tomorrow.

Pardon my stupidity, read the instructions too quickly that came with the PIR's and misread in my head as 2.2ohm and 4.7ohm.........been a long day, all day pulling cables and stuff has fried my brain.

Regards
 
Well if you have the gear to carry on
Then i would say go for it as I don't imagine a solder joint to introduce an awful lot of resistance
BTW feel your pain pulled a lot of cable in my day :) everything from 2 pair to 1200 pair
 
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"Jellies" are designed for solid core telephone cable. I would be wary of their reliability on stranded alarm cable.

Solder and heatshrink is the way to go for permanently joining such cables. A properly soldered joint should end up as a continuous chunk of metal, so there is no way for corrosion to get in between the wires.
 

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