When you fix a 150 amp service for your home, the service can handle and give you only 150 amperes of current.Įvery house’s electrical services come with amp ratings. Why do the 150 amp services disconnect?ġ50 amp is the capacity of the electrical service you have fixed in your homes.How many breakers do you need for 150 amp service?.How do I know that I am having a 150 amp service?.How much will the installation and upgrade cost?.How can I receive 150 amp service for my house?.What size of wire is needed for a 150 amp alternator?.What is the wire size for a 150 amp sub panel or breaker?.What is the wire size of 150 amp 300 feet away?.What wire size is needed for 150 amp service?. A friend of mine directed me to a place 50 miles away where the price was half of that at Home Depot. I also suggest you ask around for where the contractors buy their large cable. You will probably need to use expansion fittings on the PVC where it comes out of the ground to counter frost heaves, since you're in Illinois. I put in a 1 inch spare conduit for very little money. He also recommended installing a second PVC conduit for future cable installation since the trench was already open. NEC required only 1 or 1.25 inch PVC (I forgot which), but he suggested I use 2" since the cost of PVC is cheap and it made pulling the 2-2-2-4 AWG copper much easier. He also required a separate ground at the garage/workshop. He required a 4 wire conductor from house panel to workshop subpanel (2 hots, a neutral and a ground). Plus, since he had essentially blessed the design (with his added on conservative elements) this avoided the risk that he would not signoff on the final installation. I found my inspector a bit more conservative than the NEC requires, but on the plus side, he gave me lots of useful advice that made the job easier. I recommend you discuss this with your electrical inspector. I ran a 100 amp service out to my detached garage/workshop last summer, a total distance of 170' from my service panel. It seems to me that I need a 100 amp breaker in the main panel, 2 hot cables a neutral cable and a ground going to the sub-panel? Or is the ground optional with conduit? Once again thanks for your time and your knowledge!!! I plan on having 5 220 outlets and a couple 110 outlets and some shop lights. I have read alot of information on installing a sub-panel, But it seems everyone has a different opinion. But I just want to make sure I go big enough so to speak with the sub panel. Hiring a electrition is out of the question ($), I have no problem adding new circuts and outlets and switches. He also said I could get away with #4 Thhn cable. Is this true? He said I only need 2 hots and 1 Neutral, He also told me to use #2 guage thhn cable, (Is that overkill?)The home depot guy said (which I take with a grain of salt) That I need to put a grounding rod outside and tie to that, I have not heard that before. Some one told me (who has electrical knowledge) that i dont need a ground from the main panel to the sub panel if i use conduit, because the conduit bonds it. should I be using stranded thhn cable? Home depot dosent carry the aluminum cable. Ok thanks for the info guys!!! A couple more questions. I saved some additional money by getting a great deal on a used 125 amp breaker panel at the local Habitat for Humanity store for $10 and it was filled with breakers! My box has 20 slots and I've just about filled it out so a larger box would be highly recommended. I probably saved $800 running the circuits myself and by taking my time I have it layed out just as I want including outlets for a future air cleaner, 5 x 220v circuits for current and future equipment. I never wired before but got a couple of good electrical wiring books and talked with several "experts" to gain knowledge and confidence. I have been wiring the shop myself and have just one line to complete before I get it inspected. Not including the rental for the ditch witch, I spend about $800 for parts (nearly 100' of 3/0 to go breaker to sub) and labor to get the sub box hot. I agreed to be on site to help pull the 3/0 wire as it was very stubbon. Although not required, I had a main breaker installed on the sub panel. He came out prior and made measurements and brought out the materials (I believe 3/0 aluminum in conduit for the feed) and he installed a 100 amp breaker on my main breaker and energized the sub panel. I rented a ditch witch and had a 24" deep trench ready for the electrician. This past summer I needed to get 100 amps to my detached shop about 25' from the house. I second the previous comment about getting a licensed electrican to run the primary feed to the sub panel.
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