4 core cable

What is the operating voltage ?

Standard answer is 42!

Unless you provide some real basic information, no one will be able to help you!!

Is this a control cable, a HLI (High Level Interface) cabel or output cables for the Generator???

The answers to any or the three (3) options will vary by orders of magnitude.

No knowing where you are asking from also makes it difficult to answer your question as every country, state and local supplier will have different requirements.

For a Generator of this size in Australia, you would run a separate single core cable for each phase, neutral and earth for example, not a single four core.

Details Please????

Sapper.

dear sir:

The cable that i need is output power cable(single or 4 core).the dectance between the generator and DB : 15m

rating voltage : 400 Vac

sir you have to explain that which cable you want to use copper or alluminium both standard is different please explain. thanks

I think you requires the cables of rated LT voltage, you need to calculate the full load current rating and select the cable size accordingly. it is advisable and economical to select aluminium cable for higher current rating. while selecting cable size, consider the points like short circuit current, ambient temperature, temp. rise, cable route, etc. for proper de-rating of the cable. you may find more information in the technical catalogues of cable manufacturers and the local standards.

Hello

I have answered your Post/comments,

Generally best to use the Cable Maker of your particular cable, but try:

http://relemaccables.com/

If you are still needing help, reply with

Kind Regards....

Assuming these:

• India
• 415/240 V 50Hz ,cosΦ=0.8
• Standby Generator
• Power Output Cable hung out in the open sun~45°C max.
• 3 1/2 separate Cores PVC - unarmored

Then 3 cores -- each 630mm² Aluminium

The half size core--300mm² Aluminium

MM

dear GUEST , I will try to help you but as they mentioned above that according to lack of data submitted by you , nobody can help , so my answer will depend on the following :I considered that :

1.voltage : 3 phase 220V

2.distance from generator to switch gear or main DB : around 20 mtrs

3. maximum load is the generator ratings which you mentioned

4. temperature around 30 C degrees

the total current @ 220 v and power factor 0.8 is : 2100 A

It's preffered to use single core cables not multi-core ones , so you can use 3*630mm2 single core cable (3 per phase ) ( each 630mm2 cable cand carry around 800 A , so when you use three cables you will be at the safe side ).

don't forget my friend that we are talking in general , there are many variables should be taken into consideration if you need a precise figures.

You meant to write 3X1CX630 mm^2 XLPE/SWA/.... for phase and another 1CX300 mm^2...for grounding (?). The three phase voltage he has mentioned above is 400V?

I apologize for not pointing out earlier that you might need us to do all calculations for you and post it here (cut and paste).

By taking 640 KW or 800 KVA (when, PF = 0.8) and using the three-phase formula;

I = (KW X 1000)/(1.73 X V X PF) = (640 X1000)/(1.73 X 400 X 0.8) = 1124 A

Breaker size (adding some % age) = 1200 A

At 1200 A @ you would need : 7 X 1C X 630 mm^2 XLPE/SWA/PVC/CU

+ 1C X 300 mm^2 PVC/CU/ECC

OR

3X 4C X 300 mm^2 XLPE/SWA/PVC/CU

+ 3 X 1C X 150 mm^2 PVC/CU/ECC (grounding)