Selecting Cables and Breakers

What is your voltage?

Is this a homework question (it sounds like a simple civil illumination engineering one), or do you really not know 'ohms law' and basic electrical cable sizing calculations?

If it is the latter AND the lights are running off either single-phase 120V, 230V or 240V AC (which I also suspect) I would suggest that you get a professional electrician to do the job least your inexperience results in loss of life and/or personal property due to electrocution and/or fire. Single-phase mains wiring and design is not something an untrained person should be doing (and voids insurance in most cases).

Can you please provide more information on what you are doing and why (by your writing style I am assuming you are a student and this is homework)?

I knew Ohm's Law .I'd like to know relationship of Breaker and Amp List.Please give me

Please see previous posts and threads on CR4 regarding this commonly-asked (and answered) question.

OK..This looks like a home work question...so a little hint.

Look at the Wiring Regulations and Standards for your country.

These will dictate what is acceptable and legal in your local area.

You will need to know:-

• Supply Voltage
• Cable Length
• What type of Luminaire (This will effect the actual current)
• Is the cable arial or burried?
• In conduit or armoured?
• What is allowed voltage drop?

Hope this points you in the right direction.

Thanks & Regards,
Sapper

British Standard 7671.

u can use 1.5mm² cable and MCB is 6A

The original question was 12 * 600W lights, and it still cannot be answered without knowing (or guessing) the voltage anyway, which obviously effects the current and therefore the size of cable. The same goes for the length of cable (with regard to the permissible voltage drop).

All of which are clearly indicated in the local wiring regulations (which the original poster should be working to if this is a real electrical job or project and not some homework question).