The limit is that the breaker in the main panel to supply the subpanel has to be 90 Amp or smaller.

How large of a subpanel can I install?

Even though there is no limit on the number of subpanels that you can add to a circuit, it shouldn’t exceed 160 amps when you’re using a 200 amp main panel. Always follow this guide to install subpanels effectively.

How big should my subpanel be?





Subpanel Circuit Breaker Sizing

To calculate the breaker size, simply divide the adjusted wattage by 240 volts to find the rated amperage needed for your subpanel. Often, the result is not a common circuit breaker size. and you can simply round up to the next higher size of ​the breaker.

Can I run a 100 amp sub panel off 200 amp main?

Can you add a 100 amp breaker to your main panel? Yes you have 12 slots the double pole breaker will only take 2 slots.

Can you run a 100 amp sub panel off 100 amp main?

Let me try and answer some of your questions. First the panels you are looking at that are rated 100A simply means you can use them for any application up to 100A.

Can I run a 200 amp sub panel off 200 amp main?





Is feeding a 200A sub from a 200A main legit? Yes, and you don’t even need another 200A breaker. The 200A breaker alread present in the panel will suffice, and so you can use a subfeed lug kit as DrSparks advises.

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

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.

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

What size wire should I use for a 60 amp subpanel? You can get away with 6 AWG when you have a short run of wire, however, due to voltage drop, if you ever decide you want to go more than 100 feet then a 4 AWG is the size you should choose.

How many circuits can be on a 60 amp subpanel?

Modern 60-amp electrical panels are purpose-built as sub-panels and generally only have 8 to 10 slots available for circuit breakers.

Is 100 amp service enough for garage?



You will need #3 copper or #1 aluminum if you want to protect it with a 100 amp breaker. You can use whatever size panel you want at the garage but if you want to fully utilize it you should feed it with proper sized wire and protect that with a properly sized breaker.

How many sub panels can you have on a 200 amp service?

200 AMP Service – Feeding 3 Sub-Panels – Wire Size and Set Up Help Needed.

How many 20 amp breakers can I put in a 100 amp panel?

Typical 100-amp panels have 20 circuits, meaning they can handle 20 full-sized breakers.

What size wire is required for a 100 amp sub panel?



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 feed a 100 amp sub panel with a 50 amp breaker?

Just wire it up. There is no problem using a sub panel that can take more current than you will ever feed it. Points to note: The cable to your hot tub will be rated for 50A (not 100A); therefore you must not upgrade the breaker in your main panel to 100A.

What size wire do I need to run 100 amp Service 150 feet?

#00 AWG wire

Wire Size For 100 Amp Sub Panel 150 Feet Away
100 amp service 150 feet away from the sub panel requires #00 AWG wire (also known as 2/0 AWG wire). This wire has a median ampacity of 175 amps; more than enough than the required minimum 162.5 ampacity.

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



For a 100 ampere circuit, the conductors will likely be required to be 3 AWG copper or 1 AWG aluminum.

What size wire do I need to run 300 feet?

for 300 feet for 100 amp rated service I would use Aluminum direct burial 1/0-1/0-1/0-1/0, the forth can be as low as #4 for the ground (but also in conduit, even if in conduit must still be rated underground wire and required by code also) Also note the size wire the breaker can handle, cannot cut strands to make fit, …

What size wire do I need for a 500 foot run?

500 Feet – a 120-volt, 20 amp circuit would require 1/0 AWG wire. A 240 volt, 30 amp circuit would require 3/3 AWG wire.

What wire do I need for a 60 amp subpanel?

In short, the wire size for a 60 amp sub-panel 150 feet away is 3 AWG gauge wire.

How far can you run 6-gauge wire?



Larry Campbell is an electrical contractor with 36 years of experience in residential and light commercial electrical wiring.
For 240-volt circuits:

14 AWG 100 feet
10 AWG 128 feet
8 AWG 152 feet
6 AWG 188 feet

Do two 30 amp breakers make 60 amps?

A main breaker is a large-amperage double breaker, same as any double breaker in the breaker box, except it supplies power to each busbar. So your question is like asking if you can draw 60 amps off a 30 amp double breaker … the answer is NO.