Data and power cables

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malin_joe

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Hi,

I am planning to install a security camera system for a building. The camera power is planned to be 24V AC, around 5W. Camera is digital, using Ethernet 10/100 Mbps with CAT5e UTP as cable.

I want to run the low power cable and the CAT5e cable together in the same conduit. The distance is typically between 50 ft to 250 ft.

Is this allowed? Will there be any interference of the CAT5e data cable from the AC power cable?

Any help is really appreciated.
 
No power over Ethernet. It does have PTZ features, which will be controlled as part of the Ethernet/data connection.

One thing I forgot, I was also planning to use 16AWG for the power. Is this also sufficient?
 
310.5 stipulates that the minimum size conductor that may generally be used is #14 AWG, so unless you find a specific code reference that allows a smaller conductor, this section would require a minimum of #14. Also look at Article 720 which applies to circuits operating at less than 50-volts. 720.4 indicates that conductors may not be smaller than #12 AWG. This would indicate that a #12 would be the minimum. Also look at article 725. If the control circuit is a class 1 it may be installed with the power conductors per 725.26. See 725.54 if it is a class 2 or class 3 circuit which would generally prohibit themn from being installed with the power conductors.
 
I would assume this is a limited energy circuit, which would be Article 725, not Article 720. With that said, if it is a Class 2 or Class 3 circuit, you can put the communications circuit in the same raceway, if it meets 725.56(D).
 
haskindm said:
310.5 stipulates that the minimum size conductor that may generally be used is #14 AWG, so unless you find a specific code reference that allows a smaller conductor, this section would require a minimum of #14. Also look at Article 720 which applies to circuits operating at less than 50-volts. 720.4 indicates that conductors may not be smaller than #12 AWG. This would indicate that a #12 would be the minimum. Also look at article 725. If the control circuit is a class 1 it may be installed with the power conductors per 725.26. See 725.54 if it is a class 2 or class 3 circuit which would generally prohibit themn from being installed with the power conductors.
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Power supply circuits for a 24 volt camera should fall under article 725. Article 720 does not apply to installations that fall under article 725.

720.2 Other Articles.
Installations operating at less than 50 volts, direct current or alternating current, as covered in Articles 411, 517, 550, 551, 552, 650, 669, 690, 725, and 760 shall not be required to comply with this article.
Click to expand...
 
If the equipment is not available for me to read the labeling, and I am attempting to plan an installation, is there a rule-of-thumb for determining whether a "low voltage" item is covered by article 720 "under 50-volts" or will be a class 1, 2, or 3 system coverd by article 725? Or is this a case where it is all dependent on the labelling of the equipment?
Thanks,
 
How does this apply to the new Power over Ethernet standard then? My understanding is that Power over Ethernet is basically carrying -48V DC power source on 2 pair of a CAT5e cable to power devices up to 15 Watts, where the CAT5e cable is typically of 24AWG...?
 
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