What size wire do I need 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 #2 aluminum wire rated for?
Allowable Ampacities of Insulated Aluminum or CopperClad Aluminum 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 |
|---|---|---|
| 3 | 65 | 85 |
| 2 | 75 | 100 |
| 1 | 85 | 115 |
| 1/0 | 100 | 135 |
What size wire do I need for a 100 amp sub panel 100 feet away?
You need a 3-3-3-5 copper SER cable to carry 100 amps (that’s three #3 gauge for the two hot wires and the neutral and a #5 gauge for the ground).
What size wire do I need for a 100 amp underground 100 ft run?
For a 100 ampere circuit, the conductors will likely be required to be 3 AWG copper or 1 AWG aluminum.
What is minimum gauge wire for a 100amp subpanel?
Depending on the wire’s length and the temperature rating, you will need around a 3-gauge copper wire to power a 100-amp subpanel. As the length and temperature increases from subpanel to main, you will require a lower gauge, thicker wire to manage the load.
What size electrical wire for 100 amp service?
A minimum of 4-gauge wire and 1 1/4-inch conduit is required for 100-amp service. Buildings that have gas heat may not need any more than 100-amp service. The service size of a building is the capacity of the electrical system to power electrical items.
What size wire for 100amp service?
A 100amp service requires a minimum wire size of #1 AWG. Long cable runs would see an increase in wire size. Section 310-15 of the NEC is used to determine wire size, including referencing of table 9.
What size Ser cable for 100 amp service?
You need a 3-3-3-5 copper SER cable to carry 100 amps (that’s three #3 gauge for the two hot wires and the neutral and a #5 gauge for the ground).