Low Voltage Codes and Video Surveillance

Author: Brian Rhodes, Published on May 22, 2014

Even 'low voltage' electrical work can be dangerous. Because of that, there are specific rules that apply to those who handle low voltage systems, including video surveillance, to ensure the work is safe, reliable, and is not a risk to innocent bystanders.

In this note, we explain how the National Electric Code impacts video surveillance work.

**** '*** *******' ********** **** *** ** *********. ******* ** that, ***** *** ******** ***** **** ***** ** ***** *** handle *** ******* *******, ********* ***** ************, ** ****** *** work ** ****, ********, *** ** *** * **** ** innocent **********.

** **** ****, ** ******* *** *** ******** ******** **** impacts ***** ************ ****.

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

Low ****age *******

*** ** ******* **** **** *** '*** *******' *********** ** used ********** *** *****, *** **** *** ****** ********* *******, some *** ********** ** ******* ******** ********* ** ***. *** example:

  • **: *** ***** ******* ******* ***** ****** ******* ******* ** - **** ***** ** ** *** - **** ***** **
  • ***: *** ******* ********* ******* ** ************ ******* ** ** more **** ** *****.

** ** *** '**' *** ******* *********** **** ***** ***** cover, ********** ** ** **** **** ~** ***** (**************** *** **** ******** ** ** ** ***) *** ************ **** ******** (*.*., **** ********). ** *** US, '*** *******' ** **** ** ******** **** ******** ******** systems, ** ******* ********** *** ********* ** **** **** ** volts **** ****** ********** *********.

NEC: ******** ******** *****

** *** **, *** ***** ** *** ******* **** ** defined ** ***'******** ********** ****', **** ***** ** **** **. *** **** ****** ******* ** **** **** *** ******** in ****, **** *** ******** ******** ***** ***** *****. 

************ ****** ******* ********* **** ************ * (******* ***) ** ******, ****** "************** ******** *** *********"*** *** ******* ** *** **** ** ***** ******* *** equipment ** ********* ****: ********, ****** ******, **** ****-******* ********, or ******* ***** ***** **** ********* ** *********-***** ************.

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

*********

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********* ******

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****** *******

*** ****** *** ** **** ***** ***** *****, ********** ***** run **** ****** ******, *** ******* ********** ********** *** *******. (starting ** ***.***) ****** ******, ********* ** ********, *** **** of *** *********** ****** ** * ********. ******* ***** ***** are ****** **** *** **** **** **** *** **** ** the ****, **** *** ****** ***** * **** ** ****** quickly. ** ****, *** ********** ********* ** ***** **** ******** into **** ***** **** ** ***** ** ******* *** ****** of ***** ***/** *****. 

**** ******* **********

**** ****** **** ** *** ** ***** *" ***** **** high ******* ******* (***.**) *** *** ****** ********** ******** (***.**(*)). Variations ** **** ************* *** **** ********** *** ***, ***** affected ** ******** ****, ******* ****, *** ***** ****.

****** *****/*****

******* * **** ******* ******* ** ********, *****, *** *****. Not *** **** ******** ***** ************ ********** ** ***-***** ******* poles, ***** ****** ******** **** ********** ** ***** ** *** type, ********* ***** ********** ************ *******.  *** ****** **************. ** any **** ********** ** **** *********, **** ****** *** ** used *** ******* ***** ******* *** ************ ****** ********: "******** service masts *** **** ** **** *** *** ******* ** ***** service **** **********. ** ********, ****** *** *****, **, ****, ** CATV ****** ** ******** ** *** ******** ******* *****." (***.**, 820.10(c))

***** ******* * / ******* *** ("*************") ********* ******* ** video ************, **** *********** *** **** ** ***** ************ ** computer ********, ***** ****** **** *** '********* *** *** ******* of ********** ****' *** '**** ** ********* ** ********** **** Chapter * / ******* *** ("********* *** ***** ******* ********") ** the ****. (***-**(*)(*)).

Spotty ********

***** ******** ** *** ******** ** *** ** ****** *** expands ***************, ***** ******* ** ******** *** ****** ****. *** image ***** ******* *** ****** ** ******** ** *******, **** the **** **** ***** **** ******:

*** *** ******* ****, ******* ******* ******** *** ********* *****, with ******* ****** ******** ** *********** *** ********* ****** **** installation ***********. *** ***** ********** **** ** ***** ***** ** particulars ** * ******** **** **** *** ***** ** ***** versions.  *******, ** **** ********** *** *********** ******* ** ******** citations ** '******** ** *******' *** ********* **** ********* **** *** **** *******, ******** what ******* **** *** ********.

**** **** ** **** ******, "***** ********" ********, ******* **** no ********* ********** ** *** ******* ** ********** *** *** particular ********* **** *** ****** **** *** **** ** **** to *** ****.

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

Following *** *****

**** *** ******* ** ******** ***** **** ********* ****** *******, the *** ****** ** **** ************ ******* (*** *** *** voltage ******** ******) **** *** *** *** *** *** ** or **** ** ******* **** **. *** ***** ** ******* are *** ****** ******** *********** ********* ***** **********, *** ** *** ******** ** ****** ****, ***** ********** or ********* ****** ****** *** **********.

Comments (9)

""******** ******* ***** *** **** ** **** *** *** ******* of ***** ******* **** **********. ** ********, ****** *** *****, TV, ****, ** **** ****** ** ******** ** *** ******** service *****." (***.**, ***.**(*))"

***, * ***** *** ***** **** *** ***** ********* *** either ***-********* ** **** ******** ******...

*** ****** ********* ** *** ***** *** **** **** *** do **** ** * ***** *********, ********** ******* **** *** specially ******* ** ******* ****** ****** **** *******.

** **** *** *** *****?

*'* ****** **** ***&* (*** *******) **** *** ***** *** Cox, ****-******, **&* *** *** **** ***** ******.

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****, *** *** *** *** ********* ******* *** ** ********** to ************, *** ******* **** ******* *** ***** **** *** include **** **** ********.

*** ** ******* ***** ** ***** ****? ***** *** ********* leased ***. *** **** ** ***** *** ******** *** *** facility ***** *** ********, *** **** ** ****** **** ** be ******** **** *** ******* *********.

** **** ********, *** *******, *** ******** ***** ** ******* a *********** ** * ***** **** ** *** ***** **** of *** ********, *** *** ***** *** **** *** *** internet, ***** **** *** ******/** ******* ***** ******* * ********* location.

**** ** *******. *** **** ** ***** *** ***** **** the ***** ******* ******* **** **** *******. ****** *** ***** are ***** ** * ******* ******* ****** **** *** ***** by *** **** ** *** ** * ***** ****.

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

**: *** ***** ******* ******* ***** ****** ******* ******* ** - **** ***** ** ** *** - **** ***** ** USA: *** ******* ********* ******* ** ************ ******* ** ** more **** ** *****.

*** ********.*.<50 *

*** ********.*. >50 *

***** ** *** **** **** *** ******** ** **** *** happen...So **** ** **** **** < ** * ** *** U.K. ?

***'* ***** * *** ** ********* *** ***** ** **** automation *** ******* ****** *** ** *****/***** ********** **** *** 70 * ****** **? * ****** ******* ** **** ** LV...

****** ******* ********* *** ****** **** ***. *** **** *** very ****** ** *** *** ********* *** ************ *** ************ of ****. * ** *** **** *** ******* ****.

*** ******* *** **** **** ********* ****** ** ********* ******. Low ******* ** ** *********** ** ***** *** *****. **** is *** *** *** **** *** **** ******* ******.

****, *** ******* ** *** ****** **** ********* ** **********! It **** ****** ** *** *** ***** ** ******* *** state.

****://***.**********************.***/******/*******/*****-****/****%***********%*******.***

*** *******, ** ********* ** ********** ** ********* ** ** state ** ******** *** *** ******* ****** ******* ***** ** fire ***** ** ********.

**** ***** ****** **, ** ****, **** ********* *** ********** licensing/permitting. ******, *******, ********, *********, **********,*** ****** *** *** ****** where *********/******* *** ********.

** *** *** ********** ** ******* ** * ******* ******** you *** ******** ** **** *** ****** **** **********. *******, if **'* * *****-******* ****** ******* ***** ***** ****** *** performing **** (************ **** *****) ** ******** *** *****.

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