#What size aluminum wire for 100 amp for free#

Also occasionally it is cheaper and easier to have a second meter if your local electric company has a low minimum billing amount and includes so many feet of new service wire burial for free you might pay more over a long period of time with the monthly base rate, but you don’t have to come up with $5k for wire/conduit/excavation/labor to run a subpanel from your existing service. It also depends on the type wiring and the Code cycle in your jurisdiction and how they enforce 339.10 in the 08 Code, and as Dennis notes residential or non-residential, also 3 phase or single, 240/120 or 208Y/120. When it comes to determining the size of the ground wire for a 100 amp service, there are a few factors that need to be considered.

With electricians talking about MHF with reduced neutrals or full-sized/triplex/SER/URD/URD double rated/URD triple rated/USE2/conduit/direct burial/overhead, etc. Feeder sizing is a bit of witchcraft especially when figuring out the cheapest route to take with whatever conduit/wire type might have a current shortage or price-hike, as you can see if you google “feeder sizing for adu / garage / shop” and look at electrician forums. Nice to go in and get to ask what’s normal locally. As a general rule 2 awg aluminum wire is used for 100 amp service entrances. Most places direct burial is normal, but there are some places with the type of rocks/soil that use conduit more often. Then, you can now determine the AWG by referring to a CM to AWG conversion wire size chart.

#What size aluminum wire for 100 amp install#

You can make a similar calculation for 50 feet (10 addition), 150 feet (30 addition), and 200 feet (40 addition), and choose the corresponding KCMIL wire. For example, let’s consider you want to install a 150-amp service with a 240v power supply 100 feet away, using a copper wire. However, I think you should go in your local electric supply house and ask them what wire you’d use for a detached building subpanel run underground for 100a service run 180’. If you consult the KCMIL list above, you can see that the 350 KCMIL wire is perfect for 200 amp service 100 feet away. I have ordered from Nassau and “wire and cable your way.” Way better pricing than electric supply house.