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New Electrical Work
Electrical work ranges from the installation of new electrical components to the maintenance and repair of existing electrical infrastructure. It may also include wiring airplanes, ships and other mobile platforms.
4,938 Questions
Can a 200 amp automatic transfer switch be used with a 100 amp service?
Answer for USA, Canada and countries running a 60 Hz supply service.
No. The ampacity of the transfer switch is rated at 100 amps. What this means is that the manufacturer of the switch states that the mains, breakers installed are all rated for a maximum of 100 amps. What can be done, is to install a 100 amp breaker in the 200 amp service and use the output of the breaker to feed into the line side of the automatic transfer switch. The load side of the ATS will be a sub panel that have your preferred loads that you want to stay on during a power failure.
This said, it is a complicated job in as much as you have to know wire sizes, ampacity of wires and proper electrical workmanship. Such a project should be left to a licensed electrical contractor to take out the proper permits and call for proper inspections. By taking this route it will leave you confident that if any mishaps happen to the installation down the road your insurance company will be behind you 100%.
As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
Can a journeyman electrician work independently?
Yes. He has the required knowledge, skill and ability. All he needs to go to work is the appropriate license for the area in which he wishes to work. This may be a business license, handyman's license or a contractor's license.
What gauge wire do you need for a water ground for a 600amp service?
Answer for USA, Canada and countries running a 60 Hz supply service.
The answer is 3/0 copper or 250 kcmil aluminum and requires that the METAL water pipe have at least 10ft of its length in direct contact with the earth. Using a METAL water pipe as a grounding electrode also requires a supplemental electrode, which is most commonly one or more ground rods.
This is NOT the way most 600A services are grounded and I recommend you consult a licensed electrician in your area to determine what is commonly done in your area.
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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
What size wire do you need to use to run 200 ft and have 40 amps of service?
To answer this question a voltage must be given. By using the term service I will draw a conclusion that it is a North American service of 120/240. A #6 copper conductor will limit the voltage drop to 3 percent or less when supplying 40 amps for 200 feet on a 240 volt system. If the circuit voltage is 120 volts, then a #2 copper conductor will limit the voltage drop to 3 percent or less when supplying 40 amps for 200 feet.
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Notice: The following calculations are wrong because a #10 copper conductor is only rated at 30 amps NOT 40 amps.
To compute voltage drop (independent of voltage supply)
10 gauge wire is .9989 ohms/1000 ft
to go 200 feet you need 400 ft of #10 conductor (out and back)
just about 0.4 ohms
I*R =E
40a*0.4Ohm =16v lost in heating the wire ( 640W )
Gauge Drop(400')
#10 16v
#6 6.3v
#2 2.5v
safety has to do with the insulation
3.4 Watts/ft will melt most plastics (#10)
especially if its enclosed in conduit
or worse in a wall that is insulated.
bare conductors on ceramic insulators dont have a problem
if this is for a resistive load the figures are correct
if you are trying to run a single phase motor it may not start with #6
(starting current perhaps 7 times the running current) 45V drop
if you are trying to start a 3 phase motor with #6 it may be ok only (19V drop)
I do know a 7A 240V submersible well pump will not run with #10 wire
(200' deep well 150' from the building)
The wire coming out of the pump is #12 BTW (sales engineering)
it is a GOOD idea to do some arithmetic before buying the wire....
the motor is marked with KVA class (start/run current)
How are electrical wire sizes measured?
The amperage capacity of a wire is determined by the cross sectional area of the wire.
Another Answer
Electrical conductors are expressed in terms of their cross-sectional area. In Europe, for solid conductors, this is expressed in square millimetres. Stranded conductors are expressed in terms of the number of strands, and the diameter (in millimetres) of each strand, expressed in the format A/B (where A = number of strands, and B = diameter of strand) -from which the total area, in square millimetres can be determined.
In North America, the cross-sectional area is expressed in circular mils (round conductors) or square mils(rectangular conductors). A 'mil' is one-thousandth of an inch. A 'circular mil' is the diameter of a conductor, expressed in mils, squared -so it is not really a measure of area (as it doesn't take pi into account), but a figure that represents an area.
It's the standard Type 'G' 3-pin plug used in the UK for electrical equipment and appliances. It should always contain a cartridge fuse of the right size to match the current or "amperage" drawn by the equipment/appliance it is supplying with power. Standard fuses to fit the plug are available in 13 amp, 5 amp, 3 amp and 1 amp sizes. For more information see the Related Link and the answer to the Related Question shown below.
What size amp circuit breaker should be used for 110 outlet?
The size breaker you use is determined by the size wire used in the circuit. If you use AWG #12/2 wire then use a 20 amp breaker. If you use AWG # 14/2 then use a 15 amp breaker.
What wire size for 400 amp service neutral size?
You need to look at the regulations that apply in your country. If in doubt, use a neutral wire of the same size as the live wire or wires.
What is the size of the copper wire for a 100 amp service?
A #3 copper conductor with an insulation rating of 75 or 90 degrees C is rated at 100 and 105 amps respectively.
What size wire do you need to run a 50 amp electrical box for a small shop?
Be safe and run 6 gauge wire although 8 gauge will handle 50 amps at short distances. I assume this is a 220 volt circuit and the small shop is within 100 feet of the power source. === === <><><>
As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed. Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
Can you use 110 volt switch for 12 volt application?
Yes, as long as it is simply an on off switch. The switch only opens and closes a contact point.
Can you use a 300 watts amp on a 700 watts 6.9 speakers?
im by no means an expert but the answer is yes you just wont get full potential out of the speakers. the amp is pushing 700 watts the speakers are capable of catching 1000 watts.
Can you use a 13v 850ma power supply in place of 13v 800ma?
Yes. The voltage is the same on each. The ma rating of the power supply is the current the supply can handle before burning up. So if your appliance is designed to work on an 800ma supply, an 850ma supply will do fine.
What speaker wire for 300 watt amp?
There is no such thing as a watt amp.
To determine wire size you need to know the current. Watts = Current x Voltage, so if you know the applied voltage to the load that consumes 300 watts you can get the answer. If we assume 120 volts as standard home voltage then current is 25 amps. If you had 240 volts it would be 12.5 amps.
In general 14 AWG is 15 Amps
12 AWG is 20 Amps
10 AWG is 30 Amps
What wire size for 100amp load for distance of 1000ft?
At that distance you will have a voltage drop of 81.25 volts if you use the recommended #6 wire on a 240 volt, 100 amp single phase circuit. Therefore I recommend you contact you electric utility and let them figure the voltage drop and the size wire required to safely run this distance. Using too small a wire can damage the electronics at the end of the run.
What wire size needed for 150 feet run on 30 amp?
This is a voltage drop question. To answer this question a voltage must be stated.
What size ground wire to water meter for 400 amp service?
You need 2 ground rods of 8' in length. One under the meter base and another one 6' to either side of the meter base. Drive them into the ground with just enough sticking up to connect the ground wire.
What size breaker should be used for a 3.6 kW oven?
3000 / 240 = Amps. You de-rate a breaker by 20 % for continuous load like an oven. You could get by with a 20 Amp breaker and 12 AWG wire. However, I would recommend 30 Amps and 10 AWG for an oven for the long run.
Can you use 14 gauge wire with a 15 amp breaker for recessed lighting?
To answer this question the circuits voltage must be stated. Find the total wattage of the lights, use the following formula. I = W/E, where W is the total wattage and E is the circuit's voltage.
What size breaker should be used for 132 KW submersible pump?
400amper
Pumps are not rated in KW. I believe you mean kva, or, most likely in my mind, va. Please clarify what you have for a better answer.
If you mean 132 kva, which to many people would mean the same thing as 132 KW, you are talking about a pump that is portable only because it is hauled around on a trailer. But that kind of pump wouldn't be submersible and would most likely not be electric.
Motors are not often rated in va either, but if what you meant is 132 va, it will run on any common 15 or 20 amp circuit, assuming you connect it to the right voltage.
Why would the clothes dryer outlet heat up?
Loose connection, bad connection, they're are a few things that can be wrong. Shut the power down and open that up and check it out. The connection might be heating up. If that looks like the case, cut back and restripp the wires so you'll get a nice clean connection and install a new outlet. If everything looks good then consult an electrition because a dryer outlet can be a little warm but definately not hot.
What size wire for 400 amp distribution panel?
For a distribution panel rated at 400 amps parallel runs of 3/0 conductors will do the job.
Can you use PVC electrical conduit in an industrial kitchen?
can you used pvc pipes in a commerical business kitchen
What is the minimum burial depth of ridged metal conduit below a residential driveway?
The minimum cover requirements for direct buried conduits in vehicular areas is governed by the voltage in the conduit. Under 750 volts 600 mm (24 inches), over 750 volts 1000 mm (36 inches).
