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NEC code table C10 has conduit fill charts. Google for it.

Per the table, 1 1/4" inch conduit can support 7 #4 cables. The 1 inch conduit allegedly can support 4 cables but it will be very tight and I would go for the extra room in a 1.25" conduit.

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16y ago
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5mo ago

For a 4-wire setup including three phase conductors and one ground conductor, a common choice is to use a 1-inch conduit to ensure proper spacing and easy installation. However, it's always advisable to consult local electrical codes and regulations to determine the appropriate conduit size for your specific application.

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13y ago

Answer for USA, Canada and countries running a 60 Hz supply service.

It really depends on what type if insulation on the wire you are using and what type of conduit you are using. But, using the most common insulation in use today, THHN, and using the most common conduit in use today, EMT, you need 1 inch trade size (27mm) conduit.

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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.

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14y ago

What size is the 4 wire? Larger wires fill the conduit faster. The answer is related to "percentage fill" Look up answers in the National Electric code NFPA 70.

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Q: What size conduit do you need to install a 4 wire?
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What size conduit do you need to install a 0000 wire?

For a 0000 (4/0) wire, you would typically need a 2-inch conduit based on standard industry guidelines for safe and efficient wire installation. Always consult local electrical codes to ensure compliance with regulations in your area.


Is it permitted to use flexible conduit over 6 feet in length as a grounding means?

No. The new electrical code change does not allow any flexible conduit to be used as a ground means. It is now required to have a green ground wire pulled into the conduit with the other conductors in the flexible conduit. This grounded bonding conductor is not counted as wire fill when calculating the size of the flexible conduit to use


When do you derate wires in conduit I know the code says more than 3 current carrying conductors but is there a length of conduit run when you should start to derate?

In general, you should start to derate when you have more than 3 current carrying conductors in a conduit. The length of the conduit run itself does not determine when you should derate. Stick to the guidelines provided in the electrical code for derating calculations to ensure safe and compliant installations.


What size conduit for 400amps?

The sizing of conduit systems that wire has to be pulled into is dependant on the physical size of the conductor being drawn into the conduit. The second governing factor is the conductor count of the specific conductor that is needed. A 500 MCM copper conductor with an insulation factor of 90 degrees C is rated at 430 amps. This is where the conductor count is need by the service, as to whether the service is single or three phase. In this specific case, the electrical code will allow both single and three phase installations to use the same size conduit. A maximum total of four 500 MCM conductors can be drawn into a 78 mm diameter conduit.


What size pipe for awg 4?

A 4 AWG wire diameter is about 0.2043 inches. For this wire size, a pipe with a diameter of at least 0.5 inches (1/2 inch) would be suitable to provide ample space for the wire to pass through without being compressed or damaged.

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What size conduit is correct for 10-3 gauge wire?

You can pull 10 #3 gauge wires in a 2 1/2" conduit.


What size conduit for 3 500 mcm wires?

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.


Com cast cable House to street 250 feet Can you run cable yourself What size wire Need conduit for underground?

Comcast will install the wiring for you. They do not allow homeowners to run their own wire because they lose quality control. Typically Comcast will run a 1 inch conduit for underground installations. The wire most commonly used it RG-6 quad. comcast doesnt install conduits anymore because it was just too costly so it is upto the homeowner to have have that installed by a general contractor and then comcast will have pull in the new line for you.


What size conduit do you need to install a 0000 wire?

For a 0000 (4/0) wire, you would typically need a 2-inch conduit based on standard industry guidelines for safe and efficient wire installation. Always consult local electrical codes to ensure compliance with regulations in your area.


What size conduit do I need for 6 wire. Being hooked up to a spa?

The minimum size you can use is 3/4 conduit. The code allows for a maximum of 4 each # 6 gauge wires in a 3/4 inch pipe. You'll likely be running 3 ea # 6s, two hots and the neutral and a #10 ground wire.


What size wire do you need for a 30amp 120 volt appliance. It will be run in steel conduit.?

A #10 copper wire with an insulation factor of 90 degrees C is rated at 30 amps. If you need the full 30 amps for the load use a #8 copper wire. Loaded to 80% of rating will give you 32 usable amps.


Does a reducing bushing make wire pulling easier?

No, a reducing bushing does not make wire pulling easier. It is used to adapt the size of a conduit opening to accommodate a smaller size conductor or conduit. Proper lubrication, good planning, and the right tools are more effective for making wire pulling easier.


What size of copper wire can carry 30 amps?

Couple of things wrong here. 30 isn't a wire size. If you mean a wire that can carry 30 amps that would be # 10. Now it depends on how many # 10 wires you want to put into a conduit that governs the size of the conduit.