Lightning is obviously radio frequencies. So it interferes with radio and TV reception.

Techniques to identify the location of a lightning strike receives and triangulates its resulting radio wave.

Install SPD

The Surge Protection Device (SPD) is a component of the electrical installation protection system.

This device is connected in parallel on the power supply circuit of the loads that it has to protect (see Fig. J17). It can also be used at all levels of the power supply network.

This is the most commonly used and most efficient type of overvoltage protection.

http://www.electrical-installation.org/enw...on_Device_(SPD)

https://www.youtube.com/watch?v=ltfPOXsqtTs



This post has been edited by idealhometech: Dec 10 2016, 03:46 PM

Yes.. don't forget the earth wire(16mm2) and earth chamber(below 10 Ohms)..

Lightning strikes the overhead cables and gets diverted to ground before it has a chance to reach your equipment..

The earth wire must be properly bonded to the SPD and connected securely to a low resistance earth chamber..

Wire has impedance. That means the most critical aspect of protection is a protector as close as possible to the single point earth ground - to decrease impedance to earth. And large separation between protector and appliances - to increase impedance to that appliance. That larger separation increases appliance protection.

Not discussed in that tutorial - sharp wire bends, splices, and metallic conduit also increase impedance. That earth ground connection must be straighter, short as possible, and separated from other non-grounding wires.

Instead of NVR
Is an intel atom powered PC sufficient for IMVS 4500 with hikvision cameras?
Saw an ad for use intel Hewlett-Packard T5740
Since I'm only doing motion detected recording, I could place an ssd inside

However, is processing power enough to for 4mp camera recording with IVMS for pc?

Better use NVR.

Hi I intend to install a CCTV system for my house. I wanted to find out more on the recording of the images. When i survey internet, most of the CCTV systems come with DVR and the images are recorded on your hard disk. If let's say there is a break-in and the thief took away the harddisk, how do we retrieve the recorded video feed? Can we have some sort of external server storage? Who provides such services and how much is it?
Newbie here, appreciate some advice

First of all, we always recommend client to hide the DVR, instead of put beside the TV in Living Room or any place which is so obvious.
Second, our DVR can link to a NAS (Network Storage) or link to Dropbox, GoogleDrive, so in case DVR stolen, u still can retrieve footage from Cloud.
Another option is, at another place, use a PC (installed client software) to record.




This post has been edited by idealhometech: Dec 13 2016, 06:39 PM

What broadband package I need get from Streamyx/Unifi to run a 8 1.3Mp CCTV with HD?

Please share what kind of CCTV system you are having or going to have?
Brand, model if you know, for better calculation.

Still undecided.
Likely will get HIK Vision.Need 4 Dome Camera with IR and 4 Bullet Camera with IR.
Still unsure what system to use.Still reading....

Since you are asking for broadband package to run CCTV, so the thing you should pay attention on the broadband package is the UPLOAD bandwidth or speed.

For Hikvision network camera system, most of the camera can provide both main-stream and sub-stream.

Main-stream, is the stream that you have chosen for recording, if you have 1.3MP camera, your main stream most likely will be recording on 1.3MP, although you can adjust the recording resolution on the NVR.
Let's say your main-stream is at 1.3MP (1280 x 960 @ 25fps using H.264 compression, 2048kbps bit rate), if you want to perform remote view on main-stream, your broadband package must have at least upload bandwidth of 2.9Mbps, according to bandwidth calculator tool provided by Hikvision.

Sub-stream, is a stream derived from main-stream, which its purpose for low-bandwidth streaming support. Sub-stream has a fixed resolution of 352 x 288, regardless of your chosen main-stream resolution.
Sub-stream will take up bandwidth of around 366kbps of bandwidth, with 25fps and using H.264 compression.

As time of writing, Streamyx packages provide 384kbps upload speed for 1Mbps and 2Mbps package, and 512kbps upload speed for 4Mbps and 8Mbps package.
With 384kbps or 512kbps of upload speed, you can only have one single sub-stream view for smooth remote viewing.

As for UniFi plan, the cheapest 30Mbps plan has upload bandwidth of 10Mbps, which is enough to have 3 simultaneous main-stream view on 1.3MP.

If you want to view 8 camera simultaneously using main-stream, you will need at least 24Mbps of upload speed on your broadband package.
Becareful if you want to do this on your mobile with limited quota data plan, as it will used up the quota very fast.

Please correct me if there is any mistake.

Go for unifi or even better time fiber if available
Just grab any package that gives you the highest upload speed

alexander3133 and alucard89 , thanks for the input.
Will do more readings...very good info.
I think 1MP camera will be good enough if there's budget constraint.

Are there such thing as wireless CCTV which can view via smartphone wirelessly without internet connection for the purpose of viewing remotely in close proximity?

What's your budget for each camera?
I think you can get 3rd party onvif 1080p 2mp for around 95 ~ 100+. Motion detection should still work with hikvision nvr.

I think you can do that with any wireless cctv cam.
As long as it provides rtsp link that you can view in your lan
Some cameras are lock down like xiaomi, 360 that you can only view using their app that needs internet.

want to ask - what is the cheapest cctv camera that can record to a local pc?

This post has been edited by roadie: Dec 23 2016, 01:59 AM

I would suggest tat you can get a USB webcam instead, and then find a free PC software that offers recording from webcam.

Just noticed digi has new broadband package for rm30 with 6gb data and free 10gb youtube.
Definitely an ideal choice to monitor cctv streams at home besides streamyx where fiber not available.

This post has been edited by alucard89: Dec 28 2016, 03:01 PM