Conduit for Surveillance Explained

Author: Ethan Ace, Published on Jul 16, 2014

Cameras frequently need conduit to protect wires and cables connecting them to the headend / recorder.

However, with so many types available, it is may be difficult to determine the right one to use in each application. 

There are three types of metallic conduit common to surveillance systems:

  • Electrical Metallic Tubing (EMT)
  • Rigid Metal Conduit (RMC or simply "rigid")
  • Liquidtight Flexible Metallic Conduit ("sealtight" or "liquidtight")

Additionally, there are two types of non-metallic conduit commonly used in surveillance:

  • Rigid PVC conduit
  • Electrical nonmetallic tubing (ENT)

In this note, we break down these types, their costs, and where they fit best.

******* ********** **** ******* ** ******* ***** *** ****** ********** them ** *** ******* / ********.

*******, **** ** **** ***** *********, ** ** *** ** difficult ** ********* *** ***** *** ** *** ** **** application. 

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

  • ********** ******** ****** (***)
  • ***** ***** ******* (*** ** ****** "*****")
  • *********** ******** ******** ******* ("*********" ** "***********")

************, ***** *** *** ***** ** ***-******** ******* ******** **** in ************:

  • ***** *** *******
  • ********** *********** ****** (***)

** **** ****, ** ***** **** ***** *****, ***** *****, and ***** **** *** ****.

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

**** ***** ******** * **** ***** ***** ** **** **** of ******* ******** ****, ***** ****** ************, ** **** ** their relative ******, ****** **********, *** ****.

Electrical ******** ******

*** ** *** **** ****** **** ** ******* **** ** ********** buildings. ** *** *** ******** **** ** *** *** ******** conduits, *** **** ****** *** *** ** ***** ***** ** is *** ******* ** ****** ******** ******, **** **  **** vehicles ** *********. ******** ** ******* ******, ** *** ** used ******** ** **** ***** ******** ***** *********** ****.

************:*** **** ****** *** *********** ***** ** ** ********* **** damage, ******* ** ***, *** ** ***, ********* ****** ******. In********, ** ** ******* **** ******** **** ** * "**** out" ******* **** * ******, **** ******, ** ***** ****** location ** ***** * ********* *******, ** ****** *** ****** be *** **** *** **** ******* *******.

******, ** ** ***** **** ** * ****** **** ******* cables ******* ***** *** **** ******* *******. ********** ****** **** sure ***** *** ******** *** ******** ******* ** ***** ******* where *********.

** ** **** ************* *** ********** ******* **** ** ** **** ********** ** ****** ******, ****** **** runs ** ******* (*/*"-*/*") *** **** ** **** ******* *** wobble *** ******* ******* ***** *****.

****:*** *** *** ******** ****** ** *** *** ******** ******** *** many ***** *** ** **** ****** ***** **** ***** ******* of ********* ******* ******** *** ***** *******. *** ******** *** the ******* ****** *** *** ****** **** ** ******** ********, as ****.

****:********** **** ** ****** ******** ** ***** ********, **** ***** and ***** ****** *******.

****: ***** ****** **** ***** $*.** *** **** *** */*" ******* (often **** *** ***** *** ****** ****** ****** ****) ** about $* *** **** *** *" *** (******** **** *** sleeves). *** ** **** ** **' ********.

Rigid ***** *******

********* ****** ****** "*****", **** **** ** ******* ******** ** * much ******* **** **** ***, ********* ******* ******** ** **** ends. ******* ** **** *********, *** ******* ** ***** ******* requires *********** *** *** ***, *** ******** *** ******** **** be ******** ** ****, ****** *** ***** *** *** *** screw **********.

 

************:******* ** *** *********, ***** ***** ******* ** **** ** ***** cables *** ** ******* ** ******. *** ** *** ****** cost *** ****** *** *** **** ** ********, ***** ** not ******** **** *** **** **** ** ***** ****** ***** required ** ****. ****** ***** ** ***** ******* (*" *** up) *** **** ********* **** ******* ** ***** *******.

****:**** ****** ********* ** *** ******* *****.

****: ******* **** *** ****** ** *** *** ******** ********. ******** specialized ***** ** ******** **** ***. ******* ********* ******** ********* tools *** ***** ****** **** */*", ** ******* ** **** tools **** ** **** ***.

****:***** ******* ****** **** ***** $*.**/**. *** */*" ** ***** $5 *** **** *** *". *** ** ******** **** ** 10' *******.

Liquidtight ******** ***** *******

***** ****** ****** "****" ** "********", **** **** ** ******* ******** ** * ******** ***** tube ******* ** * *** ******, ****** ** ******** *** use ** *** *********. 

************:**** ** **** ***** **** ** ******* **** ***** ** camera ********, **** *****. **** **** ** ******** ******* *** ********* to **** **** *** ********, ****** *** ** ***** ********* a ****** ******.

****:**** ** ******* ** ************ ***** ********** ******* ***** ******* ******** bends***/************. ******* ** *** *** ******* ** *** ****** ********** in ********* ***** *** ***** ***** ******** ******** ** **** or *******.

****:****, ******** **** *** **** *********, **** ****** ********** **** EMT ** ***** ******** *** ** "****" ******* ************. *** jacket ***** **** ******** *********** ******* ******** ** ****** ******.

****: */*"***********, *** **** ****** **** ****, ***** *** ***** $*.**/**. Generally **** ** **-***' *****. ****** ***** *** ********* *** generally *** **** ** ************.

PVC *******

*** ******** *** **** ******** **** ** ******* ********* ***** cables *** ******* ** *** ********. **** *** **** **** extruded *** ** *** ****** **** ***********, ****** ******** ** and ******** **, **** **** ********* *********** ****. ****** ***** ******** which *** ********** **********, *** ******** *** ********** **** ** glued ********, ** **** *** *** ** ********.

************:***** *** ******* ** **** ******** ****** ******* ******* **********. ******** 40 ** **** **** ** ******* ****, ***** ******** *** not ****** ** ******* ** ******. *** ** *** ******* wall *** ****** ***** **********, ******** ** ** **** ***** used **** ******* ** ** ** ******, ******* ** ********, or ******* ** ******* *******.

****:*** **** *** ***** ****** ******** ** ******** ********. ***** push ** ***************** ** *******.

****:**** ********* ** ****** **** ******** ********. *********** ****** **** be **** *** ***. ****** *** ***** ******* ****** ******* the ******* *** ******* ** **** (********* **** * *********** heat *** ** ****) ** ********** ***-**** ********, ********** **** and **********.

****:*/*" ******** ** *** ******* ***** *** ~$*.** *** ****,***** ******** ** ***** *** ~$*.**. ********* **** ** **' sections.

Electrical *********** ****** (***)

**** **** ** ******* ******** ** * ******** ******* ********, which ** ***** ****, ****** ** *** ******** "***** ****." It's ***** **** ** ****** *********** ************ ***** **** **** protection ** ******, *** ***** ******* ***** ** **** ***********. It ** ****** ********* *** ** ********** ************, *******, ********** for "**** ****" ***** *** ***** ******** ** ****.

************:*** ** **** ***** **** ** ********* ************ ** ***** or ********, ** ******* ** ***** ***** ********** ** *** a *******, **** ** ********* *** ***********. ** ** **** commonly **** ** * **** *** ** ***** ** ***, connecting * ****** *** ** *** ******* *****.

****:*** **** *** ***** ******, **** ** *** **** **** on **********.

****:******************** ** *** ******* *****, ****** ** ******* ** ****** cables. *** ** ****** ********** ** ****** ** ***** ****** construction.

****:*/*" *** ***** *** ***** $*.**/**., ********* ** ***** ** ***'.

Comments (5)

Ethan, Is there some reason that you did not include Intermediate Metalic Conduit (IMC)? It has a better cost structure than rigid and can be used most everywhere rigid is used. Also it is about 2/3s the weight of rigid, making it easier to handle.

I left it out because it doesn't get used nearly as much as EMT or rigid. I agree that it's lighter and lower cost, it just isn't as common. I've seen quite a few distributors not even carry it.

Is PEX a form of ENT?

Is there a formula to get from the ID (3/4") to the OD of the PVC? What is the relationship between schedule numbers and actual thickness? 40 to 80 is twice as thick?

PEX is generally for plumbing. I haven't seen electrical fittings for it, but I could be wrong. Chances are it isn't listed for the purpose, though.

From memory, I can't tell you if 80 is twice as thick as 40, but I don't think it is. There's info on that here.

Ethan, how common, in your opinion, is the practice of direct burial of emt without additional corrosion protection? I have always used pvc whenever the job called for direct burial. I think there may even be some issues with AHJs in using emt even with watertight connectors in direct burial situations, especially without addition corrosion coatings.

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 on Tools

Installing Dome Cameras Indoors Guide on Jul 16, 2018
IPVM is producing the definitive series on installing surveillance cameras. This entry covers one of the most common scenarios - installing dome...
GDPR For Access Control Guide on Jul 03, 2018
Electronic access control is common in businesses plus organizations are increasingly considering biometrics for access control. With GDPR coming...
Axis Guardian - Cloud VMS And Alarm Monitoring - Released on Jun 19, 2018
Axis has struggled to deliver a cloud-based managed service video platform. Video service providers have utilized AVHS for over a decade, and have...
Installing Box Cameras Indoors Tutorial on May 22, 2018
This tutorial starts our physical installation for video surveillance series, starting with Box Cameras, one of the oldest and most basic types....
Measuring For Security Installation Guide on May 07, 2018
Accurate measurement is a fundamental skill, yet many installers do not know how to do it. Using these tools are a key skill needed for security...
30+ Emerging Tech Companies Examined on Mar 28, 2018
ISC West has a new segment for 2018: the 'Emerging Technology Zone', which they boast: Featuring 50 of the latest and greatest startup...
Dynamic vs. Static IP Addresses Tutorial on Mar 01, 2018
While many cameras default to DHCP out of the box, that does not mean you should use it. This may seem basic for some, but those new to the...
Visio For Video Surveillance Design on Feb 20, 2018
Many integrators have standardized on AutoCAD for camera layouts but new users may be overwhelmed by its learning curve. Microsoft's Visio...
Project Plans for Security Integrators on Jan 26, 2018
How do security integrators typically plan projects? A detailed playbook with step by step execution? Just go out and do it? Somewhere in...
Access Control Job Walk Guide on Sep 26, 2017
Significant money can be saved and problems avoided with an access control job walk if you know what to look for and what to ask. By inviting...

Most Recent Industry Reports

Axis ~$100 Camera Tested on Jul 17, 2018
Axis has released their lowest cost camera ever, the Companion Eye Mini L, setting their sights on a market dominated by Hikvision and Dahua. Can...
Amazon Ring Alarm System Tested on Jul 16, 2018
Amazon Ring is going to hurt traditional dealers, and especially ADT, new IPVM test results of Ring's Alarm system underscore. IPVM found that...
Hikvision Wins Chinese Government Forced Facial Recognition Project Across 967 Mosques on Jul 16, 2018
Hikvision has won a Chinese government tender which requires that facial recognition cameras be set up at the entrance of every single mosque...
Installing Dome Cameras Indoors Guide on Jul 16, 2018
IPVM is producing the definitive series on installing surveillance cameras. This entry covers one of the most common scenarios - installing dome...
Security Sales Course Summer 2018 on Jul 13, 2018
Based on member's interest, IPVM is offering a security sales course this summer. Register Now - IPVM Security Sales Course Summer 2018 This...
US Tariffs Hit China Video Surveillance on Jul 13, 2018
Chinese video surveillance products avoided tariffs for the first two rounds. Now, in the third round, many video surveillance products will be...
Last Chance - July 2018 IP Networking Course on Jul 12, 2018
Registration ends today, Thursday. Register now. This is the only networking course designed specifically for video surveillance...
4 Most Difficult Camera Installs (Statistics) on Jul 12, 2018
Heavy housings, cumbersome brackets, heavy ladders required, and tricky field of view requirements will cause difficulties no matter the camera...
Axis Perimeter Defender Video Analytics Tested on Jul 12, 2018
Axis 'high security' video analytics offering is Perimeter Defender, OEMed / developed with Digital Barriers. But how good is Perimeter Defender?...

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