6 AWG is the nominal wire size in copper for 50 amps. 300 feet of 6 AWG has a resistance of .12 ohms. At 50 amps the voltage drop across .12 ohms would be about 6 volts. As a rule of thumb you want to keep voltage drop to no more than 10% of the supply voltage. So it you were using 120 volts you are okay at 300 ft with 6 AWG since the drop is only 5% of the supply. If you were at 240 volts it would be even better since the drop would be 2.5%.
See NEC 310.16
ie, using THHN wire then 600 MCM copper wire will do
To answer this question a voltage has to be stated.
A 350 MCM copper wire with an insulation factor of 90 degrees C is rated at 325 amps. If the question is referring to maintaining a load of 300 amps then you have to up size the wire size because the conductor is only allowed to be loaded to 80%. A 500MCM copper wire with an insulation factor of 90 degrees C is rated at 395 amps x 80% = 316 amps.
Without the amperage the device uses this question can not be answered. The size of wire depends upon the amount of amperage a device draws. The voltage is independent of the size of the wire, it is an insulation factor. Most commonly used wire is rated at 300 volts.
If your light bulb voltage rating is under 300 volts then yes it can use 300 volt wire. The voltage rating of the wire is the maximum voltage that the wire can safely carry. The three common insulation groups is 300 volts, 600 volts and 1000 volts.
The first thing we have to do is clarify between the two items. 120 volt wire rating is an insulation rating of the wire. Like wire with ratings of 300 volts, 600 volts and 1000 volts these are the highest allowable voltages that can be applied. A wire that is rated for 300 volts is good for 120 volts, 240 volts and 277 volts. At test research facilities, equipment is tested to destruction. The label that is given to wire as a result of the tests is the highest safest voltages that can be applied to that particular wire. So when you see a wire that has a label stating that it is rated for 300 volts it means that any voltage under and up to 300 volts is safe to apply. The ability of a wire to carry current (amps) is related to the size of the wire. Now, watts is the product of amps x volts. To answer this question, assuming the supply voltage is 110 volts, an amperage needs to be stated as per the formula above.
The gauge of wire is referenced to the capacity of a wire to carry amperage and has nothing to do with the voltage. The voltage of a wire is determined by the type of insulation that surrounds the wire. The size of the wire is determined by the amperage of the load and the distance from the supply.
If you use 250 or 300 MCM wire you will need a 2 1/2" weather head. If you use 300 MCM wire then you will need a 3" weather head.
Notes: 1. Where multiple sets of service-entrance conductors are used as permitted in Section 230-40, Exception No. 2, the equivalent size of the largest service-entrance conductor shall be determined by the largest sum of the areas of the corresponding conductors of each set. 2. Where there are no service-entrance conductors, the grounding electrode conductor size shall be determined by the equivalent size of the largest service-entrance conductor required for the load to be served. 1 This table also applies to the derived conductors of separately derived ac systems. 2 See installation restrictions in Section 250-64(a).
300 kcmil @ 75°
A 350 MCM copper wire with an insulation factor of 90 degrees C is rated at 325 amps. If the question is referring to maintaining a load of 300 amps then you have to up size the wire size because the conductor is only allowed to be loaded to 80%. A 500MCM copper wire with an insulation factor of 90 degrees C is rated at 395 amps x 80% = 316 amps.
Wire shelving is much more expensive than what you think. It will cost about $300 to $500 depending on its size. More you spent the better quality you will get.
Without the amperage the device uses this question can not be answered. The size of wire depends upon the amount of amperage a device draws. The voltage is independent of the size of the wire, it is an insulation factor. Most commonly used wire is rated at 300 volts.
300 Amps if used for service entrance conductors. Table 310.15
If your light bulb voltage rating is under 300 volts then yes it can use 300 volt wire. The voltage rating of the wire is the maximum voltage that the wire can safely carry. The three common insulation groups is 300 volts, 600 volts and 1000 volts.
Find out how much current the motor draws, then look up wire tables to find out the size of wire. Ask an electrician if you are not unfamiliar with this because working at 6.6 kV is definitely lethal for the unqualified.
The required size of a conduit raceway for a 3-5000 mcm wire is 300 kcmil. It maximizes the limits on the wire fill for raceways.
Yes it depends on many variables such as what the wire is made of the size of the wire whether the wire is a multi strand wire. What governs the amount of voltage a wire can carry is the insulation that is wrapped around the wire. Like wire with ratings of 300 volts, 600 volts and 1000 volts these are the highest allowable voltages that can be applied. A wire that is rated for 300 volts is good for 120 volts, 240 volts and 277 volts. At test research facilities, insulation is tested to destruction. The label that is given to the wire insulation as a result of the tests is the highest safest voltages that can be applied to that particular type.
The Problem of the Wire Cage has 300 pages.