What wire do I need for 100 amp service?
The cable must have a wire gauge sufficient to the amperage of the subpanel—a 100-amp subpanel requires #4 copper wires or, more commonly, #2 aluminum wires, for example. (Aluminum is often used for feeder cables because the cost is typically much lower than that of copper wires.)
Can you run a 100 Amp sub panel off a 100 Amp main panel?
To the best of my understanding, there is no code issue running a 100A subpanel off a 100A main panel, so long as the wire size is correct, and the installation is correct. For a subpanel, you need four wire service (two hots, a neutral, and an equipment ground).
Can a 60 amp breaker feed a 100 Amp sub panel?
You can feed a 100 Amp panel with a 60 Amp breaker. Keep in mind that the sub panel needs to be rated above the breaker size.
Can you run a 100 Amp sub panel off a 200 amp main panel?
Of course you can, you can add the 100 amp breaker to your 200 amp as long as it isn’t overloaded, to start adding the subpanel you must first calculate how many yards it will be from the main panel to the subpanel, there is a formula that calculates how much friction will be on the wire at the connecting distance.
What kind of wire do I need for 100 amps?
At the 167°F temperature rating, a size 3AWG is required to support 100 amps ( source ). Lower temperature ratings require a lower gauge wire to reduce resistance and heat involved to support the same ampacity. The inverse is true for higher temperature ratings.
Which is the best wire gauge for a 100 amp subpanel?
For a 100-amp subpanel within the most common environment, the average wire gauge is 3AWG. This adjusts based on the above factors and environmental changes. A lower gauge is generally safer than higher gauges.
How many amps do I need for a 100-amp sub panel?
For example, if total watts of the expected load equals 15000 watts, then the minimum amp requirement for a panel connected to a 240-volt, single-phase service board is 15000/240, which comes out at 62.5 amps. This means that a 100-amp subpanel with this load and service board voltage would be able to handle the strain comfortably.
