Here are some good points about copper: High conductivityĬopper is naturally high in conductivity after silver.įor this reason, you can use copper for longer distances. The wire is also flexible and malleable, thus being ideal for working in any situation without any contractions.īut since it has such good advantages, it is very expensive and complex to install. It has high conductivity and good resistance to heat and corrosion. Of so many wire types, copper is the best type of wire for electrical work. Since we have shared two sizes of wires depending on two wire types, let’s talk about them and the reasons behind their uses. In that case, the voltage will increase, and the wire will start melting, resulting in a fire hazard.Įspecially the copper wire should be at least 2 AWG and not less than that. Suppose the wire sizes are smaller than the recommended size. They allow the wires to handle the electrical services at full amperage without high voltages or voltage drops. These wire sizes are the best and safest ones to use. The size of the wires should be the same as the live and neutral wires. So, 250 kcmil wire is the best wire for 200 amp service.ĭepending on the wire type, the best size for a 200 amp service is a 2 AWG copper wire or a 4 AWG aluminum or copper-clad aluminum wire. If you are building new houses, straightaway, go for the 200 amps.īut, while changing from 50 amps to 200 amps, the wire size will change too.ĭepending on the ampacity, a 200 amp wire can handle 250A. People are upgrading their electrical services from 40-50 amps to 200 amps. In the old days, most houses used to have only 40 or 50-Amps services.īut nowadays, we use several electrical devices to speed up our lives.įor that, a 200 amp service is the standard electrical service for normal houses today. What size of wire is needed for a 200 amp service? How many wires are needed for a 200 amp service?.Can I run a 200 amp sub panel off a 200 amp main?.How much will it cost to install a 200 amp service?.A guide to different service or feeding rates and their wire size.A chart on different wire sizes for 200 amp.What is the size of the ground wire for a 200 amp service?.What is the sub-panel wire size of the 200 amp service?.What is the conduit size for the 200 amp service?.What other factors can determine the wire size for a 200 amp service?.What size of wire is needed for a 200 amp service?.30 circuit main breaker, as it is for the 200 amp main lug. I checked the prices and they are about the same for a 100 amp. Would save the homeowner a little if they want to expand any more. On second thought after reading Curt's post, I might use a 200 amp 30/42 circuit main lug panel just in case in the future the main breaker and feeder needs to be changed, the panel will already be there. This is not the first time I've needed more spaces for a "panel change out". Lowes or Home Depot in my area don't carry anything over a 20 circuit 100 amp panel, and even the supply houses don't. This will probably be the route I take, if the homeowner want it done. I found out today at one of the supply houses, that they can order me a Seimans 100 amp 30 circuit from about an hours drive from where I live. Normally I wouldn't do it like I mentioned above, but I need more circuits than a 100 amp panel can give me. I don't know if I can get a bigger than 125 amp breaker to fit in the 200 amp panel outside or not. My other option would be to run 125 amp wire maybe and put 125 amp panel that might have barely enough room for the circuits. House belongs a 86 year old man and the panel will be in the basement. In the event that the load does get up to 90 amps or so, the outside breaker would trip, so the 200 amp is just really used as a means of disconnect for the sub panel, which I know is not really necessary since there is a main outside, but just for convenience purposes, I am thinking on putting one if I can. The wire size feeding the old fuse panels is probably #2 as far as I can tell at this point ( wasn't able to identify it completely ) but it is fed from a 90 amp breaker. The reason I would consider using the 200 amp, is to get the amount of circuits that I need in replacing old fuse panels with one breaker panel. Is there anything in the code that would prohibit using a 200 amp panel with a 200 amp main breaker as a sub panel that is fed by a 90 amp breaker.
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