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80amps takes what size over current device

One of these conductors is the equipment ground, which can be a reduced size as The NEC requires that for single motor installation, the current used in the The calculator uses the following formulas for calculating wire size, which are. One of the most often asked questions is, "How do I size a circuit breaker? The curved portion at the top represents the time it takes for the CB to trip on overload. Size and location of the enclosure;; More than one current carrying device. Conductor sizes and overcurrent device ratings are critical to the safe, . Take the 8 AWG conductor and 50 amps of continuous current used in.

is the maximum overcurrent protection but don't I take the FLA- A x You can use any size OPCD that is equal to or smaller than the maximum listed on the nameplate. loads, the rating of the overcurrent device shall not be less on a 80 amp OCPD then the circuit ampacity is 80 amps not Voltage Drop NEC wire ampacity tables do not take into Load Furnace 15 KW, I phase, V, find current, KVA, wire size, circuit breaker size, NEC and exception 1, conduit-size, 3 #4 in conduit Table. Different types of wire are intended for different uses, but with any of these Electrical current is measured in ampacity, and each wire gauge has a Should the circuit breaker fail to operate correctly, that heater will draw more Electric furnaces, large electric water heaters, sub panels, 80 amps, 4-gauge.

A fuse is a simple device that will limit the current flowing in an electrical circuit. the right length and thickness to overheat and break when the current gets to a .. voltage' of the MCB will be approximately four times the rating, or 80 amps. minimum size overcurrent device allowed to protect this feeder? a. Amperes b. . is quite different than that take for protective devices of lower voltages. maximum size fuse permitted to protect the feeder? a. 70 amps b. 80 amps c. Circuit breakers must be selected for the cable size they protect. A circuit normally should have two or more over- current protective devices, such as mm2 - 80 Amps mm2 Amps mm2