Splicing Alarm Circuits Guide

Author: Ari Erenthal, Published on Apr 23, 2017

Alarm installers commonly connect multiple sensors to a single zone. They do this by splicing the wires together. In this report, we will explain how alarm technicians splice the most common alarm wires, including:

  • What a splice is
  • Common alarm wire types - solid and stranded
  • Splicing stranded wires
  • Splicing solid wires
  • Parallel splices
  • Series splices
  • When to choose parallel splices
  • Two videos demonstrating splices

What Is A Splice?

To splice a wire is to touch the conductive portion of two wires together. This allows the electrons in a circuit to freely flow together. Alarm technicians commonly splice wires leading to different sensors together. This allows the sensors to share a single circuit. In theory, any number of sensors can be added to a single circuit. In practice, every sensor adds more resistance to the circuit.

Common Alarm Wire Types - Solid and Stranded

Alarm installations commonly use a mixture of wire types, depending on the type of sensor and the type of circuit. Powered devices such as motion detectors and acoustic glassbreak sensors often use solid wires, commonly 4/22, with the detection circuit being carried on one pair of wires and power on the other.

Magnetic contacts tend to be grouped together and need a wire that adds less resistance and is easier to splice, so alarm installers often use stranded 18/2 for these circuits. Sirens and strobes generate a large amount of resistance, and are commonly wired with stranded 18/2.

Different Wires Are Spliced Differently

In order to make a permanent connection, wires are twisted together and then covered. Splices add resistance to circuits, especially as time goes on, because exposing the copper to the elements causes it to oxidize. Incorrectly spliced wires are a common cause of false alarms and other alarm malfunctions. In these two videos, we will show you some methods of splicing wires so that they will not have to be redone after a decade of use.

Splicing Stranded Wires

Stranded alarm wires, which tend to be thicker, should be bent over and then crimped. Splices in dry locations can be covered with electric tape. Splices in humid locations should ideally be soldered. We demonstrate this in the video below:

***** ********** ******** ******* ******** ******* ** * ****** ****. They ** **** ** ******** *** ***** ********. ** **** report, ** **** ******* *** ***** *********** ****** *** **** common ***** *****, *********:

  • **** * ****** **
  • ****** ***** **** ***** - ***** *** ********
  • ******** ******** *****
  • ******** ***** *****
  • ******** *******
  • ****** *******
  • **** ** ****** ******** *******
  • *** ****** ************* *******

What ** * ******?

** ****** * **** ** ** ***** *** ********** ******* of *** ***** ********. **** ****** *** ********* ** * circuit ** ****** **** ********. ***** *********** ******** ****** ***** leading ** ********* ******* ********. **** ****** *** ******* ** share * ****** *******. ** ******, *** ****** ** ******* can ** ***** ** * ****** *******. ** ********, ***** sensor **** **** ********** ** *** *******.

Common ***** **** ***** - ***** *** ********

***** ************* ******** *** * ******* ** **** *****, ********* on *** **** ** ****** *** *** **** ** *******.******* ******* **** ******** ******************** ********** ************ *** ***** *****, ******** */**, **** *** ********* ******* being ******* ** *** **** ** ***** *** ***** ** the *****.

******** ************ ** ** ******* ******** *** **** * **** **** adds **** ********** *** ** ****** ** ******, ** ***** installers ***** *** ******** **/* *** ***** ********.****** *** ******* ******** * ***** ****** ** **********, *** *** ******** ***** **** ******** **/*.

Different ***** *** ******* ***********

** ***** ** **** * ********* **********, ***** *** ******* together *** **** *******. ******* *** ********** ** ********, ********** as **** **** **, ******* ******** *** ****** ** *** elements ****** ** ** *******. *********** ******* ***** *** * common ***** ** ***** ****** *** ***** ***** ************. ** these *** ******, ** **** **** *** **** ******* ** splicing ***** ** **** **** **** *** **** ** ** redone ***** * ****** ** ***.

Splicing ******** *****

******** ***** *****, ***** **** ** ** *******, ****** ** bent **** *** **** *******. ******* ** *** ********* *** be ******* **** ******** ****. ******* ** ***** ********* ****** ideally ** ********. ** *********** **** ** *** ***** *****:

[***************]

Splicing ***** *****

***** ***** *****, ***** **** ** ** **** *******,*** *** * ********** (********* ****** *******)** ***** *** ******.

* ********** *** **** *********** *** ** ***** ** ***** wires, ******. **** ******** **** ** **** ***** ***** *****, use *** **** ******** ******* ** ******** ******.

Parallel ****** ******

*** *** ******* ** ******* ******** ******** ** * ****** circuit *** ******** *** ******. ******* *** ****** ** ******* ************ ********** **** *****. ******** ***** ******** ******* *** ****** ******** circuits, *** ******** ***** ****** ******* *** ****** ****** ********.

****** ** ********* **** *** ********** * ***** ****** ** devices ** * *******. ** ** ****** *** ****** ** wire **. *** ******** ** **** ****** ********** * *** more ********** ** *** **** ******* *** *********.** * ****** ******, *** *** ** *** **** ** wires ** ******* ** *** *** ** *** **** ****. This ***, ** ****** *** **** ***** ** ***** *** add, *** *** ** **** *** ***** **** *** ****** to ******* ** *** ***** *********. ** *******, *** **** lots ** **** ******* ** **** *****. **** ***** *************** simpler, ******* * ********** *** ****** **** * ****** ****** of *** ******* ** * ****.

** * ****** *******, *** ***** **** **** ****** ** the ******* **** ** ******* ******** ***** *** ***** *** spliced ** ******** *** ****. ***** ****** ********** **** ** connected ** *** ***** *********, ***** *** ******* '****' ** the ***, *** ********* ** ******** *** **** *****. ** matter *** **** ******* *** ***** *** ********* ** *** circuit, ***** **** ****** ** **** *** **** ** ******* to *** ******** *** *** ** ******* ** *** ********.

******** ** ********* **** *** ********** * ***** ****** ** devices ** * ****** *******, ** *** ******** **** **** lots ** *****. ** ******* ******* *** ****** ** **********, allowing ***** ***** ******* ** ******* ** ** *********. *******, it ** ****** / **** *********** ** *********, **** *** work ** **** ***********, *** ** **** ********* ** ************ later **.

** * ******** *******, *** *** **** ** *** **** pairs *** ****** ******* ********, ** **** *** *** ** with *** ***** **** ******. **** *** ** * ********* to ******* ** ***** *********. ** ***** ** ************ *** wire ***** ** * ****** ** *** *******, * ********** must ***** **** *** ****** ******.

Parallel ******* ***** **********

*** **** ******* *** ******** ** * *******, *** ****** the ********** **** **. ***** * ******** ****** ******* ***** resistance **** * ****** ******* *****. ** ********, * ******** splice ******* **** ******** *** ********* **** * ****** ****** does.

**** *** *** *.**Ω ********* ***** ** ******:

**** *** *** *.**Ω ********* ***** ** ********:

When ** ****** ******** *******

****** ******** *** *********** *** **** ***** ************. **** *** easier *** ****** ** **** ** *** ****** *** ****** to ************. ******** ******** *** ********* **** *** ********** ***** be *** **** *********.

***** ********* ******** ******* *** ****** ** **********. ** **** circuit, ***** ** *** **** ** **********, ****** ** ***** condition. *******, ***** ****** **** **** *** ******* ** ******* if ***** ** *** **** **********, ***** ***** ******** ** attempt ** ** ******** ** ********** *** *****. **** ** known ** *********** ****. ** ***** ** *** **** *******, ** ***** ******* must ** ****** * ********* *****, ** ****** *** ** lower. ******** ******* ****** ********* **** ***** ** *** **** resistance ** * *******.*** **** ********** ** ** ***** ******* ** ******** ****** by ****** * ***** ****** ** ******* ** * ****** circuit.

** *******, **** ******** *** ****** ***** * *** *******, even ***** **** **** **** ****. ** ******, ** ********* can ******* *** *** ***** ** * ****** ****, *** the ******* ** ******* ****, *** *** ****** ********* ** a ***** ****, *** ** *****. *******, **** ** ***** an *********** *** ** ***** ** *****. *** **** ******* are ** * ****** ****, *** ****** ** **** ** for *** **** ** ****** *** ***** ****** ** ******* the **** ** ** ****. ** *** *** ******* ** a **** *** ** * ****** ****, *** **** **** have ** ***** *** ** **** ****** ***** **** ** arm *** ******. ** * **** ***** ** **** * single ****** **** ***** ****** *** **** ** *** ******, they ***** **** ** ****** *** *** ******* ** *** room, ***** ** * ****** ******** **** **** ****** ********* a ****** ******. ** ******* ******* ***** ** ******** ****** or **** ** *** ****'* ****, ****'** **** ** **** to **** * ***** *********** ** *** ******** ** *** problem, *** * ******** ********. ** *** ***** ****, **** panels *** **** ****** * ******* ****** ** ***** *** of *** ***.

***** ********** *****, *******, ******** ********** *** ********** **** *********, which *** ** *** ********* **** ** *** ************, *** can ********* ******* *** ************ ** * ******** *** ** there ** *** ****** **** ** *** ***** ***** ***.

*** ******** ** **** ** ******* ******* ** * ****** zone *** **** ** ******** ******* **** ******** ***** *** no **** ******, *** ******* ******* **** **********.

Comments (11)

*** ***, **** ******** ** *** **** **' '***** * Tape'?

****, ** *** ***'* **** ***** **** *** * ******* call ***** ****** ** **. **** ** **'* * ***** environment.

****, ** *** ***'* **** ***** **** *** * ******* call ***** ****** ** **.

*** - ********* ********* *******

****, ***** *** **** ************ ** ***** ******. **** *** more ************* *** ******** ***** ***** *****.

**** ** **********, * ***** ***** **** ***** **** * subscriber ** **** **** ***** ***** ***** *** ** ***********. Now ****'** ** ****** *********. ** **** *** ****** *** the **** *** ******** ** *** ***** ****'* *****, **** happens? **** ******* **** * *** ***, ****'* ****, ******* you've **** ****** *** ***** ********* **** ** ***** ***'* protect **** **** *******.

*** ** *** **** **** **** *** ***** ** *** using ***** *****, ****'** ***** ********* *** ****'** ****** *** monitoring. *** **** ********* **** **** **. **** **** ******** is *** *** ** ***** ** ****** ****** ** ******** them ** ****** ***** ********** ************, ******** **** ********** *** repairing ***** ***** *** ****. ***** **** ******** ** **** customer ********* ****** ***'* **** *** *** **** ** *********** you ** *** ***** ******* *** ****** ***** ***********.

*** ******* **** *** ******* ** **** **** ***** ****** to *********** ** ************* *** ******* ****, ** * ****** time ** *** ******. *** *** **** *****'* **** **** it's *** ** ********* *****, **** **** **** **** ********* the ***** **** *** *** ** ******** ******. ***** **** be ******, *****?

*** ******* *** *** *** ********.

*** ******* *** *** *** ********.

****, *** * **** **** ******* ***** ******, **** ** not ******** **

  1. ******** **** *** **** ******
  2. ******** ************ **** ****, *** ** **** ***** ****

****** * ******* ** ***** *** **** *** *** ** in **** **** ** **** ***** *** ****. ** ** a *** ** * ***** *** ** ****** **** ***** methods.

* *** ** ** ****, *** **** ****** *** **** shrink. * ***** **** *** ******** ***** *** ***** ************.

** ********, ***** ****** **** **** ********** ** *** *******.

*****'* ** ****** ** ******* ** ** ***** ** ****** or ********?

**** ********. *** ******** ********** ********** ** *** *******. **** ********** *** *********** ****** ** ** ********, *** ****'* * ******** ** the ******* ******. *** ** ** ********* **** ** *** that ***** ****** ******** ** * ******* ***** *** ******* down, ***** ** *** *** **** ** **** *** ******** to **** ** ****** ** ** ********.

*** ******** ********** ********** ** *** *******...

** **, ****'* * ******* *** ** ******* **, ** that ****** ******* ******* ***********, *** *********. *** *'* ******** just ******* ** ** *** **** :)

* *** ***** ** **** * ******** ** *** ******* (in *** ******* *****).

*** ** ** ********* **** ** *** **** ***** ****** attached ** * ******* ***** *** ******* ****...

*** ** *** **** "***** ****", ** ** ****** **** of *********?

***** **** * **** ****'* *** *** *** **** **** to ** ***** ** *** ******. *** **** ** ********* it's *** ****** *** ****(****** *** **** *******) *** ****** and **** ******. ** ** ******* **** ** *** **** way ** ******.

*** ****** ** *******, *** **** ** *** ********. **** exception *** ******** ********, *** *** **** **** ** ***** on * ****** **** (********* ** ********** * ****** ****** with ********* *****).

** *** ****** ****** ********: ****** ** ******** ******** ***

Login to read this IPVM report.
Why do I need to log in?
IPVM conducts unique testing and research funded by member's payments enabling us to offer the most independent, accurate and in-depth information.

Related Reports

Alexa Guard Expands Amazon's Security Offerings, Boosts ADT's Stock on Sep 21, 2018
Amazon is expanding their security offerings yet again, this time with Alexa Guard that delivers security audio analytics and a virtual "Fake...
Central Stations Face Off Against NFPA On Fire Monitoring on Sep 18, 2018
Central stations are facing off against the NFPA over what they call anti-competitive language in NFPA 72, the standard that covers fire alarms....
IP Camera Cable Labeling Guide on Sep 14, 2018
Labeling cables can save a lot of money and headaches. While it is easy to overlook, taking time to label runs during installation significantly...
Ascent / MONI Faces Lender Lawsuit and Debt Crisis on Sep 13, 2018
ASCMA, aka Ascent, aka Brinks Home Security, aka MONI, aka Monitronics is being sued by a group of their lenders who allege: As of June 30,...
VMS Export Shootout - Avigilon, Dahua, Exacq, Genetec, Hikvision, Milestone on Sep 13, 2018
When crimes, accidents or problems occur, exporting video from one's video surveillance system is critical to proving incidents. But who does it...
Door Fundamentals For Access Control Guide on Sep 12, 2018
Assuming every door can be secured with either a maglock or an electric strike can be a painful assumption in the field. While those items can be...
IP Camera Cable Termination Guide on Sep 06, 2018
Terminating cables properly is critical to network performance, but it can be a tricky task with multiple steps. Fortunately, this task is easy to...
ADT CEO Is Out on Sep 04, 2018
ADT's CEO Tim Whall is out, 'retiring' in less than 3 months, ADT announced. This comes amidst financial challenges, with the company's stock...
Why Vivint / Best Buy Failed on Aug 31, 2018
DIY has bested Vivint. In 2017, Best Buy and Vivint partnered with Vivint employees on the floor of 400+ Best Buy stores, helping customers with...
JCI / Napco Integration Battle on Aug 30, 2018
JCI and Napco are firing salvos at each other over integration issues which both sides blame on the other. The bigger problem is that central...

Most Recent Industry Reports

Alexa Guard Expands Amazon's Security Offerings, Boosts ADT's Stock on Sep 21, 2018
Amazon is expanding their security offerings yet again, this time with Alexa Guard that delivers security audio analytics and a virtual "Fake...
UTC, Owner of Lenel, Acquires S2 on Sep 20, 2018
UTC now owns two of the biggest access control providers, one of integrator's most hated access control platforms, Lenel, and one of their...
BluePoint Aims To Bring Life-Safety Mind-Set To Police Pull Stations on Sep 20, 2018
Fire alarm pull stations are commonplace but police ones are not. A self-funded startup, BluePoint Alert Solutions is aiming to make police pull...
SIA Plays Dumb On OEMs And Hikua Ban on Sep 20, 2018
OEMs widely pretend to be 'manufacturers', deceiving their customers and putting them at risk for cybersecurity attacks and, soon, violation of US...
Axis Vs. Hikvision IR PTZ Shootout on Sep 20, 2018
Hikvision has their high-end dual-sensor DarkfighterX. Axis has their high-end concealed IR Q6125-LE. Which is better? We bought both and tested...
Avigilon Announces AI-Powered H5 Camera Development on Sep 19, 2018
Avigilon will be showcasing "next-generation AI" at next week's ASIS GSX. In an atypical move, the company is not actually releasing these...
Favorite Request-to-Exit (RTE) Manufacturers 2018 on Sep 19, 2018
Request To Exit devices like motion sensors and lock releasing push-buttons are a part of almost every access install, but who makes the equipment...
25% China Tariffs Finalized For 2019, 10% Start Now, Includes Select Video Surveillance on Sep 18, 2018
A surprise move: In July, when the most recent tariff round was first announced, the tariffs were only scheduled for 10%. However, now, the US...
Central Stations Face Off Against NFPA On Fire Monitoring on Sep 18, 2018
Central stations are facing off against the NFPA over what they call anti-competitive language in NFPA 72, the standard that covers fire alarms....
Hikvision USA Starts Layoffs on Sep 18, 2018
Hikvision USA has started layoffs, just weeks after the US government ban was passed into law. Inside this note, we examine: The important...

The world's leading video surveillance information source, IPVM provides the best reporting, testing and training for 10,000+ members globally. Dedicated to independent and objective information, we uniquely refuse any and all advertisements, sponsorship and consulting from manufacturers.

About | FAQ | Contact