According to appendix C of the NEC, 3 #2 awg are permitted in a 1" EMT.
You will need to look up cabling/wiring codes.Is it:Telephony,Audio distribution,110 volt power lines, orHigher voltage power lines?
A size 3/0 AWG copper main bonding jumper is typically required for service entrance conductors rated at 250 kcmil copper. This is based on NEC requirements for sizing the main bonding jumper to be at least 1/10th the circular mil area of the largest service entrance conductor.
Copper wire is commonly used in electrical wiring for buildings, homes, and industrial facilities. It is also used in telecommunications and data networking applications for transmitting signals. Additionally, copper wire is used in various consumer electronics and appliances.
For five runs of #12 AWG conductors, a minimum of 1 inch PVC conduit would be required to meet the fill ratio requirements, providing adequate space for the conductors while allowing for future additions or modifications.
9-10, but the conduit may not exceed a certain length, or a certain voltage in order for you to "legally" do it. Many applications allow for conduit fill ratio's that exceed the standards of the NEC ( National Electrical Code) and most of them are short (less than 24") "chases" between control devices mounted in listed Junction boxes for that purpose. It is not advisable to fill a conduit more than the NEC allows for purposes of heat dissipation.
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According to the National Electrical Code (NEC), the ampacity of a 4 AWG THHN copper wire at 75°C is 85 amps, and 95 amps at 90°C.
For a 125 amp circuit using THHN wire, the appropriate wire size would be 1/0 AWG.
The recommended wire size for a 100 amp circuit using THHN wire is typically 3 AWG (American Wire Gauge).
#8 aluminum thhn 90 degree wire is rated at 30 amps. Remember to de-rate the wire for more that three conductors in a raceway and the second de-rate for the ambient temperature. Most students miss the de-rate for more that three conductors in a raceway.
50 mm or 2 inch will handle the 3/0 wires for a 200 amp service.
In a three-quarter inch EMT (Electrical Metallic Tubing), the maximum number of 12 AWG THHN conductors allowed is typically 10, according to the National Electrical Code (NEC) guidelines for conduit fill. However, this number can vary based on factors such as the specific application, bundling, and ambient temperature. It’s always important to consult the current NEC code and local regulations for accurate requirements.
No, code does not allow that.
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.
No, a single 8 AWG wire cannot be replaced by two 10 AWG wires in terms of electrical capacity and current-carrying capability. The 8 AWG wire has a larger cross-sectional area and can handle more current compared to two 10 AWG wires combined. It's important to match the wire gauge with the specific requirements of the circuit to ensure safety and proper functioning.