CCTV Grounding

[nhfire77]

Ain't everything a $100 dollors now. Santa's Coming ... :roll: DTK-4VP

I thought they did that at every CCTV drop on the service side?

Can I make due with a inline and then standard branching?

A single in line will work, but the multi in/out units are just plain more convenient and simplify your wiring, IMHO.

 

[Volta]

Well actually there is an entire article
ARTICLE 820 Community Antenna Television and Radio Distribution Systems
The title is misleading.

Article 820 , although the title is misleading. Where the coax enters the building, install an impulse supressor, transistion to the interior listed coax. With the inpulse supressor create a single point ground, see 250.94

Code says: Art. 820 is for radio frequency signals (antennae, CATV, or such). CCTV signals are line level and don't fall under the scope of 820.1.

Common sense says: Lightning doesn't care. You sure are right about the physical aspect of what should be done.

 

[sinbad]

we install ditek on all outdoor analog cameras we install now. I learned it the hard way. if the line is direct burial your risk of getting screwed are higher anyway w/without surge protection but a surge suppressor on both ends will help.

protecting for example 8 outdoor cams will cost you ~$1000, and if you didn't buy your system from costco it'll cost you a lot more to replace the camera or god forbid the DVR when the next surge hits the area.

 

[sinbad]

I've just noticed the following image in "Guide to Low-Voltage and Limited-Energy Systems" which stat the coax must be grounded. I wonder if the Ditek units are to be confused with the need of grounding or do I need to bound it to the EGC closer to entry point to building?

(http://www.mikeholt.com/documents/lowvoltage/pdf/LowVoltBook.pdf)
page 24