![]() Or perhaps he had a hard time explaining things. Try to keep in mind permits and inspections are how you know the fella ain't a serial arsonist that is continually buring people's shit down. If he isn't permitted, he might have a hell of a time getting the power company to reconnect your electricity. If he is not licensed, then he is not permitted. Shit like this is on the test to become an independent contractor or master electrician, like me. Your handy fella can't calculate service conductors correctly. He took er backwards from what was intended. The correct application of that that 4/0 4/0 2/0 can actually be permitted to carry up to 225 amps in a single family residence. He believes the max that wire can carry is 87 or 83% of its listed rating. So, what it appears you handyman is doing is this, he is miscalculating the ability of the wire by applying that demand factor incorrectly. This accounts for a safety margin to avoid nuisance tripping of the main, and the continuous nature of the load. So what that means is if you handyman conducts a load calculation as required by the National code (which is super unlikely, as it is waaay harder than a service conductor calc) and it tells him he needs up to a 200 A service, he is fine to use 2/0 2/0 1/0 copper, because the NEC acknowledges that the calculation will be higher than the actual demand on the system. Code allows up conductors to be rated at 83 or 87% of the calculated load for a single family residence. there is a high probability this is a missaplication of code. They can give you a 150, they can give you a 200, but 189 is not a possibilty. If you are going for a standard copper service, 2/0 2/0 1/0 copper is standard in my area, as the code specifically allows it. 4/0 4/0 2/0 use is good to 300 A if direct buried, 205 in pipe. We currently have central air conditioning. We may switch to an electric furnace and water heater, may get an electric car, and may want a sauna down the road. I'm not sure if 189 amp service is technically under the umbrella of 200 amp service from code perspective or not, and if there are any practical or resale advantages to the full 200. Seeing as we hardly need 100 amp service right now, is it worthwhile upgrading to the full 200 amp service? Ontario code now requires 200 amp service for new builds, and also requires it for hot tub installs (not something we need). They have provided the option of 189 amp service with aluminum wire, or a full 200 amp service with copper wire (note this is the exterior wire coming to the panel). It makes financial sense to upgrade our service from 100 amp at the same time, even though we don't need it at the moment. We are located in Ontario, Canada and need to have some electrical work done on the power mains line coming to the house. Not sure if the link to my original post is working, so here it is: Search before posting please Related Subs Misc tips and tricks Becoming an apprentice? Useful certifications for electricians Trade Threads Posts that fail to meet above requirements will be removed. r/AskElectricians /r/askanelectrician /r/diy /r/homeowners /r/electrical. Suggesting the burning scrap wire to remove the insulation will result in a ban. ![]() NO DIY, SELF-HELP POSTS, OR QUESTIONS FROM NON PROFESSIONALS. Incorrect, unsafe, or hazardous information will result in a ban. This includes company names of contractors. ![]() Back it up with a code reference.ĭO NOT post any personal information. Rules Generalĭon't be a dick, and adhere to the reddiquette If you are looking for DIY or general help please visit /r/askelectricians Pre-Apprentices start here before posting Help your fellow Redditors crack the electrical code. Talk shop, show off pictures of your work, and ask code related questions. Reddit's International Electrical Worker CommunityĪka The Great Reddit Council of Electricians In this photo, have a piece of paper with your username and date written on it. To get verified, send a photo to the mods that has your certificate/seal/card. Users with have verified their qualifications with the Mods Then message the mods with the country you are from. To add your country's flag to your flair, you must select a title from the drop down menu.
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