What size Thhn wire is good for 100 amps?
When it comes to the lines connecting master and secondary panels, where the line will carry as much as a full 100 amps, use a 2-gauge non-metallic sheathed electrical cable. The cable must contain one or two hot wires depending on your needs, one neutral wire, and one ground wire. Each wire should be 2-gauge in size.
What size wire is needed for 100 amps?
The right wire for 100 amp service is gauge 1. 125 amp requires a wire size 2/0. For 150 amp, the right wire size is 3/0. For 200 amp service, you will need a wire size 250 kcmil.
Is #4 Thhn good for 100 amps?
Sub Panel 100 amp breaker is a number 4 copper ok to use for a feeder? No good. #4 THHN is only rated for 85 amps at 75° C. This would be for MC cable or conductors in a raceway.
What size wire is good for 200 amps?
Wire Sizes For 200 Amp Service Wiring 200 amp service requires either #2/0 copper wiring or #4/0 aluminum or aluminum clad wiring. Which wire used is determined by the voltage drop and length of the wiring. Many electrical contractors opt to use #4/0 aluminum or copper-clad wire.
What amperage is 4 Thhn good for?
Allowable Ampacities of Insulated Copper Conductors
| Conductor Size (AWG/KCMIL) | 60°C/140°F TW, UF | 90°C/194°F TBS, SA, SIS, FEP, FEPB, MI, RHH, RHW-2, THHN, THHW, THW-2, THWN-2, XHH, XHHW, XHHW-2, USE-2, ZW |
|---|---|---|
| 10* | 30 | 40 |
| 8 | 40 | 55 |
| 6 | 55 | 75 |
| 4 | 70 | 95 |
What size cable for 100 amp service?
When it comes to the lines connecting master and secondary panels, where the line will carry as much as a full 100 amps, use a 2-gauge non-metallic sheathed electrical cable. The cable must contain one or two hot wires depending on your needs, one neutral wire, and one ground wire. Each wire should be 2-gauge in size.
What is underground service cable?
Underground cable. An underground cable is a cable that is buried below the ground. They distribute electrical power or telecommunications. Such cables are an alternative to overhead cables, which are several meters above the ground.
What is the size of a copper wire?
The diameter of the metal conductor in a 12-gauge copper wire is 0.0808 inches; of a 14-gauge wire is 0.0641 inches.