Can I Use Aluminum Wire To Feed A Subpanel?

Can you use aluminum wire service entrance?

Aluminum can be used for main service entrance and sub panels.

As Firestarter said, fine for sub panels.

Aluminum Cons: Larger conductors for the equivalent ampacity as copper..

Why Aluminium is preferred over copper?

Aluminum has 61 percent of the conductivity of copper, but has only 30 percent of the weight of copper. That means that a bare wire of aluminum weighs half as much as a bare wire of copper that has the same electrical resistance. Aluminum is generally more inexpensive when compared to copper conductors.

Why is Aluminium better than copper for overhead cables?

An aluminium wire have a 1.5 times larger cross section to pass the same current as a copper wire, but two times lighter. Weight is one of the most important parameters for high-voltage power lines that transmit power over long distances. Therefore, only aluminium wires are used in main overhead power lines.

What size wire do I need to run a 100 amp subpanel?

The cable must have a wire gauge sufficient to the amperage of the subpanel—a 100-amp subpanel requires #4 copper wires, for example.

What wire do I use for a subpanel?

You need 10-gauge, three-conductor cable to wire a 30-amp subpanel. This cable has two hot wires (usually colored red and black), a white neutral wire and a ground wire, which is usually bare but could be green. It carries electricity at 240 volts, so you must treat it differently than regular 120-volt electric cable.

Which wire is better Aluminium or copper?

Aluminum Wire vs Copper Wire Copper wiring is more stable than aluminum and smaller conductors are needed to transmit power loads. Overall all it is more durable and performs better than aluminum wiring. One of the disadvantages of copper wiring is its cost.

What wire size do I need to go 100 feet for a 60 amp service to a workshop?

My rule of thumb for a service connection is to use the largest conductors that will fit. If 6 AWG fits, then use it, but 8 AWG would work. I know, it’s only a 100 foot run, but your workshop may eventually grow to have more power loads, so a larger service conductor provides a better power factor (cooler wires).

What size aluminum wire do I need for a 200 amp service?

SERVICE ENTRANCE CONDUCTORS SIZE AND RATINGService or Feeder RatingCopper ConductorsAluminum or Copper-Clad Aluminum125 Amps#2 AWG#1/0 AWG150 Amps#1 AWG#2/0 AWG200 Amps#2/0 AWG#4/0 AWG1 more row

What wire is used for service entrance?

SE-U (Service Entrance – Style U) Cable SE-U is most commonly used for service entrance applications, to connect the meter socket to the main breaker panel. It is also commonly used for overhead service drop applications, to connect the overhead service cable to the meter socket.

Can I use aluminum wire instead of copper?

Aluminum pros and cons Aluminum wire is generally easier to use than copper because it’s lighter and more malleable, making it an ideal wiring material to use over long distances.

How many wires do I need to feed a subpanel?

twoA subpanel requires two hot wires connected to a 240-volt double-pole breaker in the main panel. It also needs a neutral wire and a ground wire. The cable used for this run is known as a “three-wire cable with ground.” The two hot wires, called feeder wires, will provide all of the power to the subpanel.

Do I need a grounding rod for a sub panel?

To make this easier, consider the grounding conductor (the ground wire) as a backup neutral. … So for your first question: no, it is not against code to install a ground rod at the subpanel. It is actually required by code.

Is copper a better heat conductor than aluminum?

Copper: Heat Conductivity. As you can see in this table, copper is more conductive than aluminum. In fact, aluminum only has 60% of the thermal conductivity that copper does.

What size wire should I use for a 70 amp subpanel?

There is a mininum wire size which is required based on the circuit breaker rating. That size is #4 copper or #2 aluminum. You get this number by using a quality voltage drop calculator by specifying the breaker amperage and a wire length of 1 foot.

What size aluminum wire is good for 60 amps?

1 Answer. Number 4 aluminum is good for 65 amps at 130′ the voltage drop at 60 amps would be 2.55% . Up to 3% is allowed by code.

Why is aluminum wiring bad?

Aluminum oxide has a very high electrical resistance, so it creates yet more heat and potential connection problems. Expansion and contraction: When an electrical current is run through aluminum wires, the additional heat causes the metal to expand and contract more than copper wires, which can cause loose connections.

What size wire do I need for a 60 amp subpanel?

That would be 4-gauge wire. In practice, however, it’s common to wire 60-amp breakers with 6-gauge, 3-conductor wire because an appliance that needs a 60-amp breaker seldom draws the full 60 amps. If you’re installing a 60-amp subpanel, however, it’s best to connect it to the main panel with 4-gauge wire.

Can a 60 amp breaker feed a 100 amp sub panel?

Nope. The breaker protects the wire leading to that subpanel. The “100 amp” rating of the subpanel is the max rating that you can feed it at.