0

# What size wire should you use for 1000 amps?

Updated: 8/10/2023

Wiki User

14y ago

It primarily depends on the voltage, distance and load. The longer the cable, the higher the resistance/impedance. There are also factors such as the ambient temperature, type of insulation, number of conductors, and whether it is buried in the ground or suspended in the air.

At a very minimum, 100 Amps (using a 24kVA generator) could feed a house using type THHN 60C conductors having AWG 1 or larger, but only over about 230 feet (copper conductor, 240 volts) before voltage drop would exceed 3 percent. A smaller conductor would not be allowed if the system actually pulls 100A. If the load is actually 60A, for example, you can get over 100 feet using AWG 6 (or a bit over 60 feet if it's at 120 volts).

Note: A typical house with 100A panel does NOT use 100A at the same time, and the generator (and connecting cable) should be designed to supply only the normal load, or perhaps just the emergency loads (if it is a standby system).

Wiki User

16y ago

Wiki User

14y ago

There are a couple of choices. Single conductor is out of the question as it is physically too hard to work with. That type of current handling capacity is done with bus bars using bus trough. Parallel and triple runs of conductors is the more likely scenario Parallel runs of 750 MCM or triple runs of 400 MCM will give you a total ampacity of 1000 amps. A 750 MCM copper wire is rated at 500 amps and a 400 MCM wire is rated at 345 amps.

Wiki User

13y ago

Normally you would run a minimum of two parallel runs 750(mcm/kcmil) 90c rated copper wire depending on other circumstances like distance, conduit fill, and wire load you might need to step up to 2 runs of 1000(mcm/kcmil) or 3 runs of 500(mcm/kcmil) copper rated at 90c.

Wiki User

13y ago

The formula you are looking for is Watts = Amps x volts = 100 x 240 = 24000 or 24 KVA x pf. The most likely single phase generator would be 25kW as it is a standard size.

Wiki User

14y ago

To carry 100 amps you would need to use AWG-1.

Wiki User

6y ago

You need to mention the number of phases, voltage, copper or alluminum cable, to get the correct reply / amswer

Wiki User

8y ago

Service entrance wire must be AWG # 4 Copper wire.

Wiki User

10y ago

A #3 copper wire with an insulation rating of 75 or 90 degrees C is rated at 100 and 110 amps consecutively.

Wiki User

13y ago

To answer this question the voltage and phase is needed.

Wiki User

11y ago

4 AWG copper or 2 AWG aluminum.

Earn +20 pts
Q: What size wire should you use for 1000 amps?