I’m going to pop in a photo of our house wiring later. I was nearly moved to make use of that traditional Victorian fixture, the fainting couch, when I first saw it. In DHB’s words, our house was, and I’m quoting here, “attacked by crack-addled drunken monkeys on a three day bender”. The reality of the situation is that several people have attempted to rewire the house without understanding basic stuff about amp load, circuits, etc. At least they seem to have used a proper gauge wire.
The breaker box is labeled but our recent experience proves that those labels bear little to relation to the reality of what a given breaker may or may not shut off. For example, turning off the “Kitchen” breaker also turns off the front porch light Adding to my concern is the fact that the previous owners wired the electric range (stove top + oven) straight in to the house wiring. On the back side of this wall, they pulled the 220V outlet through the wall so that they could plug in an electric dryer. Needless to say, we’ve not bothered to set up our own electric dryer as yet which is why I’m kind of in a big push to get the bath and laundry room done. Trips to the laundromat are a PITA.
Because of this, we’ve started turning off the main breaker any time that we have to do anything that might touch wiring.
SAFETY TIP: Get yourself one of those cheap $10 testers from the box store and even if you think the breaker is off, check the wiring you want to work with. Ten bucks and two minutes is some pretty cheap “not electrocuting yourself” insurance. If in doubt, throw the main breaker for the house.
Now we’re going to have a chat about wiring. Wiring isn’t difficult. Heck, most of it isn’t even dangerous IF you do it right. First off, you need to *what* you are wiring. I personally recommend 2 20AMP circuits per room. While a lot of people consider this overkill, the burgeoning number of electronic devices dictates that we really should consider installing more than minimum code so that your renovation isn’t behind the techno-8 ball in a few years – much as we look back and snicker at the wiring and circuits of the mid-previous century. I also recommend that you consider adding a few things to your electric system while you’re renovating.
1) Look at moving to 300 Amp or even 400 Amp service.
You’ll have to call your electric provider and have a chat with them to see what’s available in your area. NOTE: Once you have the upgraded service, you’ll have to upgrade your main breaker panel to handle it. That is definitely a job for an electrician.
Another alternative is to have a 2nd meter and panel. It’s not desirable in most situations but we plan to do this with the large detached garage. That way DHB can run all the power tools he wants without browning out the house 🙂
2) Add a whole house surge suppressor.
I am constantly surprised that this isn’t a more commonly used option. They’re generally less than $100 and they provide an extra layer of protection for sensitive and expensive devices like flat panel TV’s. They do need to be installed by an electrician, but it’s a quick, simple, and straight-forward job in most cases. Spending ~$200 to protect your $2000 TV, refrigerator, AC unit, etc. just seems like good sense to me.
3) Add a back up generator.
If you’re elbow deep into your electrical system, now is the time. Just make sure that you wire specific outlets for power and preferably color code them. For example, if you’re using white outlets throughout the house, use black ones for the ones that have generator power. That way, you can be sure not to overload your generator should it have to kick in and you’ll have enough power to keep critical things like the fridge, freezer, etc. powered up.
Now a few notes about electricity….
If you overload circuits by either by volts or by amps, you can start a fire.
These two situations causes the wiring to heat up so much that it catches things around it – like your walls on fire. So having the proper gauge wire and not overloading your circuits is VERY important.
I’m going to make a couple of assumptions here.
One, you have a properly installed breaker panel.
Please note: I do not think this part of the job is “DIY friendly”. I think you should call in a licensed electrician to do this part for you. It involves having the electric company come out and pull the meter while the new panel is installed with a new main breaker to handle the increased load. Since all the power to your house will be OFF, this isn’t something you want to dork around with. You want someone who can get in, get it done, and get out before your green beans start defrosting.
Two, you can read, follow directions, and have some wits about you.
I realize that this may be a stretch for some, but I prefer to assume ignorance over stupidity. What’s the difference you ask? Well, ignorance is curable through education. Stupidity is life long.
Three, go down to your local planning and zoning office and get a copy of your local electrical code.
Keep in mind that this is MINIMUM code. These are the bare minimum that are required for a structure to be considered habitable. You are certainly allowed to go above and beyond code and I, personally, encourage you to do. Reading the code might not be as much fun as a bodice-ripper or spy thriller but it is VERY educational. It will tell you in fairly precise detail about how the work both you and your electrician are going to do should be done. This will let you do your own “inspection” of his work before the city shows up. If it’s not up to par – for example, if he’s not using staples to hold the wiring, fire him and get someone else. Be sure to complain to the licensing body in your area if his work isn’t up to code. TAKE PHOTOS AND DOCUMENT IT.
While you are there, be sure to chat with the good folks about what does and what does not require a permit in your area. Tell them what you are *considering* and most will be only to happy to tell you how to go about it, what permits you need, what the inspection schedule should be like, etc. should you decide to proceed.
SCAM ALERT: If your contractor tells you something doesn’t require a permit but the permit office says it does, RUN!! If your contractor asks you to get the permit yourself, RUN!!! If your contractor tells you that he doesn’t have a license or insurance, RUN!!!
In most places there are different permits for homeowners working on their house and contractors working a house. There are also different inspection requirements for work done by a home owner vs. a contractor. If your contractor isn’t licensed, you have no one to complain to but him should he do something that say, causes your roof to fall in. You can try to sue him… notice I say try… And the same goes for insurance.
Four, that you have enough basic wiring skills to at least say rewire a lamp, or change out a light fixture or light switch.
That means you know how to operate your breaker panel, use an electric tester, strip wire, use a wire nut, etc. As one person I know says “It’s not rocket surgery”, but in this day an age of not doing anything, you’d be surprised how many people don’t have that level of skill and just aren’t comfortable with it.
SAFETY TIP: If the circuit involves 220/240V power – please call a pro. 110V might hurt like the dickens but 220 WILL KILL YOU.
Now, you have your shiny new breaker panel. It’s laid out for 2 x 20 AMP breakers per room with some “special” breakers for things like the stove, AC, furnace, dryer, etc. If it’s not 110, please please please let the electrician run it for you. The few dollars you shell out might just save your life. You can however, peek over his shoulder to make sure that it at least LOOKS like he’s doing a proper job of it. And when YOU run wire, it should look pretty much the same way.
- Work should be neat. If the wiring looks messy, fire your electrician. Messy work = problems later. Just trust me on this.
- Work should be labeled. If he’s running wire to your stove, dryer, etc. both the breaker panel and the cable should be marked as such. Labeling = less headaches later.
- Wire should be of a proper gauge for the amperage of the circuit breaker.
- Wire should be of a proper type for kind of circuit breaker.
Certain rooms should have certain kinds of breakers and/or outlets. In most places, bed rooms are required to have Arc Fault outlets. That way any appliance shorting out doesn’t start a fire. Kitchens, bath rooms, and other wet areas should have GFCI outlets and/or breakers. GFCI breakers and outlets detect that the outlet/switch/device is grounded out and stop supply current. What this means to you: If you splash water on that outlet by the sink while you are cleaning (which I have done), the outlet and/or breaker stops the current so that you don’t fry.
SAFETY TIP: GFCI and Arc Fault switches/outlets, etc. should be tested once a month. 20 minutes minutes or so once a month is some pretty cheap “not electrocuting yourself” insurance. If you are not comfortable wiring them, please hire a professional. Remember, these are things that can save your life. How will you feel if you, your SO, your child, your pet, or anyone else gets hurt because you wanted to save a few bucks and attempted something you shouldn’t have?
Here’s the rule of thumb for using the proper gauge of wire. You will see it on the package – something like 12/2 or 10/3. That first number is the gauge of the wire. The bigger the wire, the less resistance (google on OHMS if you want more information) and the less likely you are to have any kind of “overheating” issue.
Intended Use |
Amps – from circuit breaker |
Proper Gauge |
Low-voltage Lighting and Lamp Cords |
10 Amps |
18 Gauge |
Extension Cords |
13 Amps |
16 Gauge |
Light Fixtures, Lamps, Lighting Runs |
15 Amps |
14 Gauge |
Receptacles, 110-volt Air Conditioners, Sump Pumps, Kitchen Appliances |
20 Amps |
12 Gauge |
Electric Clothes Dryers, 220-volt Window Air Conditioners, Built-in Ovens, Electric Water Heaters |
30 Amps |
10 Gauge |
Cook Tops |
45 Amps |
8 Gauge |
Electric Furnaces, Large Electric Heaters |
60 Amps |
6 Gauge |
Electric Furnaces, Large Electric Water Heaters, Sub Panels |
80 Amps |
4 Gauge |
Service Panels, Sub Panels |
100 Amps |
2 Gauge |
Service Entrance |
150 Amps |
1/0 Gauge |
Service Entrance |
200 Amps |
2/0 Gaug |
So that second number in the 10/3, 12/2, etc… I guess you all want to know what that’s about. That’s the number of conductors in the cable. The kind and location of the receptacle you’ll be wiring will determine what KIND of wire/cable you use. For example, outdoor outlets will need a different type of cabling than indoor ones. There are so many guides on the internet, at the box stores, in your local code, etc. for this, I’m going to skip over it.
What I am going to do is talk about something that I don’t see covered a lot, which is determining circuit load. Let’s take my side of the bed room as an example. I have a lamp, a cell phone charger, my laptop, a heating pad (hey, demo is hard work), an electric heater, and an electric blanket. Now, mind you, this is just my HALF of the bed room. It doesn’t include the over head light, the closet, or DHB’s side of the bed.
Lamp – 60 Watts
Cell Phone charger – 3.5 Watts
Laptop – 85 Watts
Heating Pad – 75 Watts
Heater – 1500 Watts
Electric Blanket – 200 Watts
Here’s how this works Volts (in this case house voltage – 110) x Amps (20 Amp Circuit) = Total Watts I can have or 2200 Watts. Now, with all of MY goodies, the room (which is on a single breaker) is sitting at 1923.5 Watts of usage. That leaves pretty much bupkiss for DHB, the ceiling fan I want to install, or the closet light. And DHB has his own lamp, Laptop, cell phone charger and another half of the electric blanket. Making it more like another 300 Watts. Add in an overhead fixture – say 200 Watts for lights and fan and another 100 watt light in the closet. That puts us WELL over the 2200 that the current circuit can support. Now the 1923.5 + 300 + 300 = 2524. And so we have just blown our circuit breaker. Now imagine for a moment I’m a teen age girl with a blow dryer, curling iron, make up mirror, TV, stereo, and lava lamp on top of all that.
Now you see WHY I recommend 2 x 20 AMP circuits per room. It results in a far more reasonable approach to dealing with the plethora for electrical devices that now permeate our lives.
My personal preference in wiring houses is:
- Light fixtures (e.g. the “boobies” hanging from your ceiling) have their own circuit(s). You can put a whole lot of 100 watt bulbs on a single breaker.
- Rooms are split in a “left” and “right” which is consistent through the house. Outlets on the “left” side of the room get wired to the “left” breaker. Outlets on the “right” side of the room get wired to the “right” breaker”.
- LEAVE ROOM FOR EXPANSION. You will almost certainly want to plug more stuff in later.
- Label EVERYTHING. You won’t remember where X is in 6 months when you need to touch it again.
HANDY TIP: You can color code your wire/cable using India ink . Dip a Q-Tip in the India and swap over your cable to color code it or get one of the stamp pad inkers that you can swirl around on it.. Make sure you do this outdoors, that you wear clothes you don’t care about and that you allow it plenty of time to soak in and dry. Unlike “permanent” markers or other permanent inks which can rub off or that some solvents will remove, this stuff will really hold up well – even with cable that has to fished through the walls. Just be sure to put your color code chart in a safe place.
Why is that a handy tip? Because when you’re half way through the attic with a flash light in your teeth, it’s kinda handy to know you’re still following the right cable….