The minimum size of a electrical cable recomended for use in power circuit is.
http://www.google.com/search?hl=en&rlz=1G1GGLQ_ENUS342&ie=UTF-8&ei=Ta3tSvujJtHmlAfV6eC3Dw&sa=X&oi=spell&resnum=0&ct=result&cd=1&ved=0CAYQBSgA&q=minimum+size+of+a+electrical+cable+recommended+for+use+in+power+circuit&spell=1
It depends on the temperature of the service area, and the current to be allowed in the circuit.
The minimum size of an electrical cable recommended for use in a power circuit depends on several factors, including the amount of current flowing through the circuit and the distance the cable needs to cover. To determine the appropriate cable size, you can follow these steps:
1. Determine the current rating: Calculate the maximum current flowing through the circuit. This can be done by summing up the currents of all devices connected to the circuit. Make sure to consider any potential future additions to the circuit as well.
2. Choose an appropriate conductor material: Different types of conductor materials have varying current-carrying capacities. Copper is commonly used for its high conductivity, while aluminum is often used for larger applications due to its lower cost.
3. Consider voltage drop: When selecting a cable size, it's important to account for voltage drop. Voltage drop occurs as current flows through a cable, resulting in a decrease in the voltage at the load end of the circuit. Consult the appropriate voltage drop tables or use an online calculator to determine the maximum allowable voltage drop for your specific application.
4. Reference cable capacity tables: Refer to cable capacity tables or ampacity charts provided by manufacturers or electrical standards organizations. These tables will provide guidance on the maximum current capacity for different cable sizes and types, considering different installation conditions such as ambient temperature and bundling restrictions.
It's worth noting that local electrical codes and regulations may also provide specific guidelines for cable sizing in different applications. Therefore, always consult the relevant standards and regulations applicable in your region to ensure compliance and safety.