8 gauge is quite a common wire size. Obviously, it’s quite useful to know how many watts can an 8 AWG wire handle. We are talking **max. wattage** here. Let’s break this down quickly:

8 AWG wire can handle anywhere from **192 watts to 24,000 watts** (this is for 8 AWG *aluminum* wire at *6V* and 8 AWG *copper* wire at *480V*, respectively).

Now, why is this range so big? Here’s the reason:

Max. wattage of 8 AWG wire depends only on 2 factors:

**How many amps can an 8 AWG handle.**To get this info we need to check this copper wire ampacity chart (for 8 AWG copper wires) and this aluminum wire ampacity chart (for aluminum wires).**Voltage.**The higher the voltage, the more watts the 8 AWG wire carries. Most common voltages are 12V, 110V, 120V, 220V, and 240V.

When we get both amps and volts, we can calculate the maximum wattage an 8 AWG wire can handle using this basic electric power equation:

**Power (Watts) = Current (Amps) Ã— Voltage (Volts)**

From the 2 ampacity charts cited above (based on NEC 210.16 tables), we can see that:

- 8 AWG
*copper*wire can handle**50 amps**. - 8 AWG
*aluminum*wire can handle**32 amps**.

Now that we have the amps, you need to know the voltage we apply to the 8 gauge wire.

Quick Example: *How many watts can an 8 AWG copper wire handle at 120V voltage?*

We know that 8 AWG wire can handle 35 amps, and that the voltage is 120V. Let’s just put both of these numbers in the equation above like this (with the result):

Max. Wattage (8 AWG copper, 120V) = *35 Amps* Ã— *120V* = **4200 Watts**

We can see that 8 AWG copper wire at 120V handles a maximum of 4200 watts.

These calculations can be a bit tedious. That’s why we created a calculator that determines the max. wattage of 8 AWG wires, based on the wire material (copper vs aluminum), and voltage.

On top of that, we also calculated max. wattages of 8 gauge wire at voltages ranging from **6V to 480V**, and summarized the resulting maximum wattages in **2 charts** (*1st chart for copper*, and *2nd chart for aluminum wires*).

Here is the 8 AWG wattage calculator, followed by both max. wattage charts:

Alright, let’s look at 1 example just to illustrate how this calculator works:

*How many watts can an 8 AWG copper wire handle at 240V?* We just pick **‘Copper 8 AWG Wire’**, input **‘240V’** in the voltage input field, and we get this result *(screenshot)*:

We immediately see that 8 AWG copper wire on 240V handles up to 12000 watts.

Now, this is just one example. We calculated maximum watts 8 AWG wire can handle at **6V, 12V, 24V, 48V, 110V, 115V, 120V, 130V, 208V, 220V, 230V, 240V, and 480V**, and summarized the results in 2 charts (1st for copper wires, 2nd for aluminum wires).

Here is the 1st 8 AWG copper wire max. wattage chart, followed by the 2nd 8 AWG aluminum wire max. wattage chart:

## 8 AWG Copper Wire Maximum Wattage Chart

Voltage (Volts): |
8 AWG Max. Wattage (Copper) |

6 Volts | 300 Watts |

12 Volts | 600 Watts |

24 Volts | 1200 Watts |

48 Volts | 2400 Watts |

110 Volts | 5500 Watts |

115 Volts | 5750 Watts |

120 Volts | 6000 Watts |

130 Volts | 6500 Watts |

208 Volts | 10,400 Watts (10.4 kW) |

220 Volts | 11,000 Watts (11 kW) |

230 Volts | 11,500 Watts (11.5 kW) |

240 Volts | 12,000 Watts (12 kW) |

480 Volts | 24,000 Watts (24 kW) |

Here we can see that 8 AWG copper wire on:

**6V, 12V, 24V, and 48V**voltages (these are usually batteries) can handle from**300 watts to 2400 watts**. Since most batteries have 12V voltages, the most important part here that 8 AWG copper 12V wire can handle 1200 watts.- Standard voltages(
**110V, 115V, 120V, 130V**) handles anywhere from**5500 watts to 6500 watts**. - Upgraded voltages (
**208V, 220V, 230V, and 240V**) handles anywhere between**10,400 watts to 12,000 watts**. - Huge
**480V**voltage can handle**24,000 watts**. This is the absolute maximum wattage an 8 AWG copper wire can handle for residential uses.

Let’s have a look at 8 AWG aluminum wire (that can handle only 32 amps vs. 50 amps 8 AWG copper wire can handle):

## 8 AWG Aluminum Wire Maximum Wattage Chart

Voltage (Volts): |
8 AWG Max. Wattage (Aluminum) |

6 Volts | 192 Watts |

12 Volts | 384 Watts |

24 Volts | 768 Watts |

48 Volts | 1536 Watts |

110 Volts | 3520 Watts |

115 Volts | 3680 Watts |

120 Volts | 3840 Watts |

130 Volts | 4160 Watts |

208 Volts | 6656 Watts |

220 Volts | 7040 Watts |

230 Volts | 7360 Watts |

240 Volts | 7680 Watts |

480 Volts | 15,360 Watts (15.36 kW) |

Here we see that 8 AWG aluminum wire can handle anywhere between **192 watts to 15,360 watts**, depending on the voltage.

You can also check how 8 AWG wire compares to 6 AWG wire here.

We hope that the 8 AWG maximum wattage is clear now. If you have any questions, you can use the comment section below, give us a few numbers, and we can help you out.