Electricians will use their electrical code book to fine these values.
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The NEC has a table that shows what size cable to use with each amperage and where it can be used.
To answer this question the voltage is needed.
The recommended cable size for a 100 amp electrical circuit is typically 3 AWG copper or 1/0 AWG aluminum.
Wire size becomes an electrical hazard when it is under rated for the amount of current (Amps or I) it has to carry.Current is the flow of electrons in a circuit. If the current is too large for the cable, the cable will be subject to heating, which is a possible fire hazard.
A 134 kVA cable typically refers to the size of cable required for a 134 kilovolt-ampere electrical load. The size of the cable needed will depend on factors such as the length of the cable run, the voltage drop allowed, and the type of insulation and conductor material required to safely carry the current. It is recommended to consult with a qualified electrical engineer or contractor to determine the specific cable size needed for your application.
The NEC grounding table provides information on the minimum size of grounding conductors based on the type and size of electrical equipment being used.
The equipment grounding conductor table provides information about the size of the grounding conductor needed based on the type and size of the electrical equipment being used.
Conversion of cable diameter to circle cross-sectional area and vice versa. Scroll down to related links and look at "Conversion of cable diameter to circle cross-sectional area".
Sizing of ground conductors is based on the load capacity in amps of the generator. There is a table in the electrical code book which states an amperage and what size ground wire that is needed for that amperage.
The correct size of cable depends on the length of the cable run, as well as the voltage and current. Another consideration is what voltage loss is acceptable ? Safest answer would be to use a cable sizing table or online tool: http://www.solar-wind.co.uk/cable-sizing-DC-cables.html Hope that helps. G.
The first thing that has to be done is to determine what the amps or wattage of the connected load is. This can be done from the nameplate on the equipment or device to be connected. If only the wattage is found use the following formula Amps = Watts/Voltage. Once the current is known the cable size is determined from a table of, allowable ampacities of 3 copper conductors in a raceway, in the electrical code book that is used in your specific region.
The recommended cable size for 210 amps would be at least 2/0 AWG (00 AWG) for optimal performance and safety. Make sure to consult the National Electrical Code (NEC) or a professional electrician to determine the exact cable size needed based on the installation requirements and conditions.