Can I use an existing outlet in basement that's uses 14/3 wire and tap off of it to wire up a bathroom with 14/3 for light . Fann And one gfci outlet ?
14/3 wire is supposed to be protected by a 15 amp breaker. Think about what you might plug into the existing outlet, What you might plug into the new outlet, what lights are already on the basement circuit, and what lights you'll have in the bathroom. You've got to total the loads you expect might be on at the same time. If you decide a total of 15 amps is enough, to avoid confusion you should use 15 amp rather than 20 amp outlets. On the other hand you might like to consider that when short circuits happen, they usually happen appliances plugged into outlets. If a breaker that's likely to open opens, it might be good if the basement lights stayed on so you can find the breaker box and reset the breaker and/or find your way out of the basement. If it were me and there was room for another breaker in the breaker box, I'd put in a separate 20 amp (12/3 wire) circuit for the basement outlets. I'd limit the use of the existing 14/3 wire circuit to the basement lights and the new bathroom's lights. (If necessary, you _may_ be able to remove a single old-style breaker from your breaker box and replace it with two new breakers) Whatever you do make sure it's consistent with your local electrical code requirements. Many jurisdictions will allow you the homeowner to do your own wiring and they'll inspect it for you.
Bathroom receptacles should be on a seperate 20 amp circuit to permit devices like hair dryers. Same rules as a kitchen counter by a sink.
Yes, as long as the total draw on all outlets devices on the branch circuit does not exceed 15 Amperes - those wires should be protected by a breaker at that level in the electrical panel.
The USA National Electrical Code (NEC) states: 210.11(C)(3) at least one 20-ampere branch circuit shall be provided to supply bathroom receptacle outlet(s). This circuit shall have no other outlets. Exception: Where the 20-ampere circuit supplies a single bathroom, outlets for other equipment within the same bathroom shall be permitted. The basement outlet circuit s not a 20-amp circuit because it is 14/3 rather than 12/3. It supplies something other than a bathroom. You could use that circuit for the fan. For the bathroom outlet, you can tap into another bathroom circuit that supplies only bathroom outlets. Otherwise you need a new 20-amp circuit. Since you are talking about 14/3 wire and a gfci outlet I assume that you are in the USA or Canada. I think that Canadian requirements are very similar. PS Regardless of what you think you might need, electrical code requirements need to be followed. You might get away with something that looks good if you don't need to have it inspected or do it without getting a building permit. However, if you sell your house, a prospective buyer might not be able to get a loan if substandard work is discovered.
