New Electrical Work

1. Proper cable connection through a suitably rated starter.

2. No over load situation

3. Mechanically stable mounting and aligned well with the driven equipment.

4. Safety precautions to be taken based on the equipment driven by the motor.

Wire is sized by the amperage that it will carry. 5 kW is 5000 watts. The equation to find watts is W = Amps x Volts. The equation to find amps is Amps = Watts/Volts. As you can see a voltage is needed to calculate the amperage. Once the amperage is stated, the wire size can be given for that particular amperage.

Your question is unanswerable because we have no idea what you're connecting. Without further information as to what these wires are for I would say leave the wires to a professional.

From what i can tell with the National Electrical Code the smallest wire listed is 18 AWG that is listed at 7 amps and 5.6 for continuous loads which is running for more then 3 hours at a time so i would rate a 20 AWG at about 5 amps MAX and 2.5 for continuous but good luck with that

Look on the handle end of the main breaker. There should be a number there. That is the amperage of the main breaker. That is the size of your house service.

A 500 MCM copper conductor will limit the voltage drop to 3% or less when supplying 350 amps for 150 feet on a 208 volt system.

A 30-A outlet would be for a specialized installation, such as for a welder or other high-wattage device. You would typically have a single outlet, although you could certainly have multiple outlets for convenience, as long as there were procedures to prohibit use of more than one at a time.

Under no circumstances should any HOUSEHOLD receptacles (15 or 20-Amp) be installed on any branch protected by a 30-amp breaker, as this would cause a fire and electrocution hazard.

To answer this question the voltage of the generator must be given.

10/3 wire with 30 amp double pole breaker from panel box to water heater.

THHN wire is moisture resistant thermoplastic allowed for use in dry and wet locations. Maximum temperature is 60 C or 140 F. Being thermoplastic it should not be handled below 0 C as cracking of the insulation could easily occur.

To answer this question a voltage needs to be stated. The formula needed to find the amperage is I = W/E. Amps = Watts/Voltage. Once the amperage is found, the proper size conductor to handle that current can be established. Without knowing the amperage on 400 watts a good guess would be a #14 wire. This wire size is good up to 1440 watts at 120 volts.

Judging by your question I'm going to take a guess and say you should probably not attempt to do this yourself. Nor do I recommend it.

That being said.

You can either have your service upgraded to 200amp, and install a 100amp double pole breaker and branch it off into a 100 amp sub panel. You could most likely re-use your old panel for the 100 amp sub panel.

Or...

You could have your new 200 amp panel installed in a different location and your current panel wired into it for 100 amps.

"Locked Rotor Current" also called LRA which stands for Locked Rotor Amps, is commonly found on electric motor nameplates. Locked Rotor essentially means the motor is not turning. The current or amps in this case have to do with the amount of electrical energy required to start the motor. At the instant the motor is switched on, it is not turning, and draws the maximum current. As the motor starts to turn, the current goes down. This required energy is much greater than the Full Load Amps or Running Amps, which is the current drawn when the motor is running at normal speed under full load. The current required to start the motor will depend on the type of motor as well as the specified design voltage required for the motor, typically the higher the voltage, the lower the required amperage or current.

The term also applies to equipment such as Air Conditioners which have an enclosed motor inside the compressor, as well as the condenser fan(s) etc.

Depending on the type of motor, LR current can be anywhere from 3 to 8 times the normal running current, also called RLA, or running load amps.

In the United States and in commercial and industrial installations a 20 amp circuit may have 13 outlets, a 15 amp breaker may have 10.

In a home there is no limit except common sense. I wouldn't put more than 2 rooms on a circuit. This limits how much goes off when a breaker trips, especially since in homes very often your lights and outlets share circuits.

This is one that should be left for a qualified person. As the job can effect life and limb a permit should be taken out and the job inspected. Failure to do this can leave you responsible if someone should get hurt due to faulty wiring or practices. Sorry, get an electrician and insist he takes out a permit and an inspection is done.

it is used to measure pressure and as well as calibrated to measure temperature

To reduce 12VDC to 7VDC you need a voltage divider in the ratio of 7/12, such as two series resistors of values 5KOhms and 7KOhms.

Of course, this "trite" answer (the resistor divider) depends on how much power you need to supply, and how much source to load current regulation ratio you need.

You might need to follow this up with an class C amplifier, compensating for the 0.6 volt drop across the base-emitter junction.

You might need an OP-Amp controlled emitter follower, with a zener reference.

For high current applications, you might even need a switching regulator.

The top of the breaker box cannot be more than 6 ft 7 in off the floor. No defining height is mandated from floor to panel box base. Defer to common sense when placing the panel box. Make it easy to see and read the top circuit breaker and location identifications of the remaining breakers.

Service entrance wire should be AWG #3 copper.

A 125 amp panel or subpanel requires # 2 gauge feeders and neutral. (# 2 awg is rated for 130A) However, depending on the existing load in your main 150A panel you likely don't have enough power to operate a 125 Amp subpanel.

This type of question usually means you aren't ready to do this yourself. Study some electrical material and the National Electrical Code and work this answer out for yourself. If I were to give you an answer, you might attempt to do something you shouldn't be doing, and that may cost someone a shock, a home fire, or their life.

When I wire a panel, the outer insulation of the romex does not extend past the romex connector, after the actual conductors have been neatly shaped to the ground / neutral bar and the line has been brought to the breaker the insulation of the hot & neutral is then stripped exposing 1/4 inch of copper then landed.

Wire sizing of a feed conductor is based on the amperage that a device draws. To calculate amperage from KVA a voltage of the supply has to be stated. Without this voltage and whether the transformer is single or three phase an answer can not be given.