camera cable systems
Can some one help in calculating 230V cable selection for feeding power for CCTV cameras. ?
The problem is long distance though power requirement is very low. the details are as follows.
Total length from distribution board to the last junction box- 1080 Meters
Total wattage of camera and other systems – 1300 W [230V]
Cable to be used- PVC flexible cable unarmoured through underground conduit
when i calculated with the help of voltage drop data of cale catalouge I found requirement of 25 sqmm cable for this load of 7A,
So egerly waiting for someone who can help me!!
Anup
If you end up with 25 sqmm (!!) then you must have considered a voltage drop of almost zero. You have to be practical….
Your “camera and other systems” may be rated at 230 Volt, but you should find out at what lower voltage it still can reliably work. Sitting here, I would guess 220 Volt still will work fine.
That translates to a voltage drop of 10Volt (whole length) at 5.7Amp (not 7). I suspect you have read the rating labels of your equipment and added the numbers up, all of which are peak demand.
So, let’s say a single length of wire in your cable should have less than 8.7Ω, which translates (at 1080 meters) into a 2 sqmm cable.
So you seem to be out by a factor 10…..
Video Camera in Cable Box System to Monitor Public
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