New Electrical Work

If the 12,000 BTU A/C only requires 20 amps to run then yes you can use the same 12 gauge wire but you cannot change it to a 15 amp breaker. You will need to install a 20 amp double pole breaker. If it requires more than 20 amps you will have to replace the wiring and breaker.

The cost of 2 AWG aluminum wire can vary depending on the manufacturer, length, and location. On average, you can expect to pay between $0.50 to $2.00 per foot. It's best to check with local suppliers or retailers for the most accurate pricing.

The white is neutral. The house does have a neutral wire even though it may be black. One of those black wires is the neutral and the other is the hot wire. You will have to determine which is hot and which is neutral. You can easily do this with a voltage tester. The wire that lights the tester is the hot. When you wire the light simply wire the hot to hot, and the white and green to the other wire.

The grounding wire is not intended to be a load-carrying conductor in ordinary use, but rather a SAFETY conductor. Grounding wires are often "one size smaller" than the associated load conductors in the same cable.

The test button should only trip the GFCI. The fact that it is tripping two breakers indicates that somehow both breakers are feeding your GFCI circuit. I have seen this when there was a wiring error and two circuits were joined in an outlet that was connected to a breaker and through the GFCI outlet.

To troubleshoot determine which outlets are effected when both breakers are off. Pull outlet from box and if there are two feeds remove one from outlet and run a toner on wire left on outlet to panel and one off outlet to panel. The GFCI could block the toner so if one side of the outlet does not tone back to panel check at GFCI. There must be two paths to your electric panel for the two breakers to trip and the GFCI may be faulty as well.

Another way to check is to have the GFCI reset and both breakers on. Check each outlet that you have identified as being on GFCI noting that they can be in different rooms. With all outlets working turn off one of the tripped breakers. See if any outlets so off. If not turn off the other breaker and turn on the first breaker. If power is still present then the outlets are being fed by both breakers.

6 AWG. It is the amps that matter most, but there are other elements in that a maximum voltage may be specified as it relates to the insulation on the wire. In an auto the wire is usually stranded rather than solid.

All other things being equal, the apartment would use less energy than the stand-alone residence.

But other factors enter in, such as:

What are the energy practices of the residents?

How energy efficient are the two residences?

But most significant, what is being used to heat the residence? If the apartment is all electric and the stand alone home is heated with natural gas, the electric consumption of the apartment WOULD be higher.

A 90 amp 220 volt circuit would typically require a wire size of at least 4 AWG (American Wire Gauge) for copper conductors or 2 AWG for aluminum conductors to safely handle the current without overheating. It is important to consult with a qualified electrician to ensure proper wiring size and installation according to local electrical codes.

Wire size is based on the amperage capacity of the service it is feeding. You tell me the service amps and I can tell you the wire size.

For a 20 amp 220 volt electric motor, you would typically want to use a wire that is rated for at least 12 AWG (American Wire Gauge) to ensure proper power transmission and safety. It's always best to consult local electrical codes or a certified electrician to ensure compliance and safety.

Yes, three 10 AWG wires can handle 90 amps when wired together in parallel. Each 10 AWG wire can typically handle up to 30 amps, so three wires can handle a total of 90 amps. It's important to ensure that the wires are securely connected and properly sized for the current being carried.

For a 30 amp load on a 120 volt 1-phase system, you should use at least a 10-gauge copper wire to ensure safety and efficiency. Additionally, it is always recommended to consult with a licensed electrician to determine the exact wire size needed for your specific application.

For a 166 amp 3 phase circuit, you would typically need a receptacle that can handle at least 200 amps to provide a safe margin. This would usually correspond to a 208V or 240V 3 phase receptacle with appropriate amperage rating, such as a NEMA L15-30 or L16-30 receptacle. It's critical to consult with a qualified electrician or electrical engineer to ensure the correct receptacle is selected for your specific application and local electrical code requirements.

You have a 3000 watt load at 300 ft from the power source. Assuming a 240 volt supply voltage, the current is 12.5 amps. The voltage drop should be 5% or 12 volts, so the total resistance should be 1 ohm or less.

With 600 ft of wire (2 wires) the allowable resistance per foot is 1/600 ohms, or 0.0047 ohms per metre. A 1 sq.mm. wire has a resistance of 0.0168 ohms/metres, so you need wire of 0.0168/0.0047 sq.mm., that is 3.57 sq.mm. Use wire with a cross section of 4 sq.mm. That is 11 AWG or 13 SWG. If these sizes are unavailable, use the next larger size (smaller gauge number).

The main contact controls the load current to the motor, whereas the auxiliary contact is part of the control circuit -usually connected in parallel with the 'on' pushbutton switch to maintain the control circuit in the energised state, once the on pushbutton has been pressed.

Yes, you can use 8 gauge THHN wire for a 30 amp circuit. This wire size is sufficient to handle the current safely and meets the requirements of the National Electrical Code. Just make sure to follow all applicable codes and standards when installing the wiring.

Isolation between power and control circuits is necessary to prevent high voltages or currents from affecting sensitive control components, ensuring safety and reliability of the control system. It also helps in preventing electromagnetic interference and noise from the power circuit, which could disrupt the control signals and lead to system malfunctions.

For a small electric welder operating at 120V and up to 20A over a distance of 35 feet, a wire gauge of 10 AWG would be suitable to minimize voltage drop. This gauge ensures efficient power transmission and safe operation for the welder.

No, it is not safe or recommended to connect a 200 amp service to a 125 amp panel. The panel must be rated to match the amperage of the service to avoid overloading the panel and potential fire hazards. It is important to upgrade the panel to match the service amperage.

An ordinary light switch does NOT have any neutral -- it only switches the live wire. Some installers use the white wire as a "switched" wire to the light fixture, where the power cable went to the light and a separate cable went to the switch. Technically, the white wire should have been marked with red or black tape at each end, to signify it is not neutral - it is either live or off.

In that case, you would not be able to use a PIR switch because there is no neutral, which is necessary to provide power to the electronic circuit in the PIR.

You would need to rewire the switch with a new power cable from the branch circuit. The you have the live and neutral wires in the outlet box, connect them to the PIR, and run the pigtailed neutral and the switched live (and pigtailed ground) to the light fixture (where you would disconnect the other power cable completely and cap the ends separately).

For a 100 amp main panel located 100 feet away, it is recommended to use a 2/0 copper or 4/0 aluminum service cable to ensure proper voltage drop and capacity for the distance. Consult with a licensed electrician to determine the specific requirements based on local codes and conditions.

A 12 AWG wire would give you approximately 2.6 percent drop, which is less than the maximum allowable voltage drop. 14 AWG would drop you 10 volts (4.2 percent), which is still workable until you factor in the 80 percent design factor (i.e., you are only allowed to run a circuit at 80 percent of its design capacity).

If you REALLY need 15 amps, you have to design for 18.75 amps (which works out to a 14 AWG voltage drop of over 5 percent, which is not allowed), so you would need to use the larger wire (12 AWG) for a 3.3 percent drop.

500,000 watts/240 volts = 2,083.34 Amps (single phase)

Typically a washing machine and gas dryer don't use a motor larger than 3/4 hp, and other than the timer, they don't typically have much of an additional current draw.

Most 3/4 hp motors pull about 6.5 amps, putting the total current load of both devices at 13 amps.

You shouldn't have trouble putting them both on a single 20 amp circuit, provided that there are no other devices on the same breaker, AND provided that the washer and dryer do not draw much more than estimated.

Understand that all manufacturers have their own idea of what the perfect washer and dryer should be like, so you may need to verify the current draw of each device before making assumptions.

And understand that the current load on a breaker should not exceed 80% of it's rated capacity, meaning that the total current draw of the two devices shouldn't exceed 16 amps.