Over the next few months I’m going to be putting out a series or posts on what to look for when walking a house to help estimate repairs. The goal isn’t to make you an expert, but to help you know when something needs fixing. As a wholesaler you just need to come up with an rough estimate (most likely conservative until you gain enough experience). Being able to spot some roof problems, or know what to look for when examining an electrical box should help you out in knowing if you need to replace, repair or leave alone an item on your check list.
I am not experience at all in estimating repairs and have only seriously done it once. That being the case I’m going out and asking the questions and doing the research to come up with a quick check list of items to look for. Each week I will take a closer look at a part of the house and let you know what I find. Hope this is helpfull and if you have something to add, please do so.
Electrical Panels
- Minimum amperage for a modern house should be about 100amps
- New 200 amp panel & breakers: $1500 to $2000. (Not sure if that is installed or for just the hardware)
Minimum Requirements for House Hold Items (gotten from http://www.applianceaid.com/electric.html)
- Gas Range : 110-120 vols, 60 hertz and a properly grounded 15/20 amp circuit breaker of fuse
- Microwave: 110 – 120 volt, 60 hertz and a properly grounded 15/20 amp circuit breaker of fuse
- Dishwasher: 110 – 120 volt, 60 hertz, properly grounded circuit protected by a minimum 15 amp breaker or fuse ( d/w without temp boost ) to a maximum of 20 amp breaker or fuse ( d/w with temp boost )
- Refrigerator: 110 – 120 volt, 60 hertz, properly grounded circuit protected by a 15 amp circuit breaker or fuse.
- Gas Dryer: 110 – 120 volt, 60 hertz, properly grounded circuit protected by a 15 amp circuit breaker or fuse.
- Electric Dryer: 220 – 240 volt, 60 hertz, properly grounded circuit with 30 amp breaker or fuse protection.
- Electric Range: 220 – 240 volt, 60 hertz, properly grounded circuit with 40 amp breaker or fuse protection with #8 gauge wire. With a 50 amp breaker, # 6 gauge wire is required.
Handy Calculation Formula
- Amp * Volts = Watts
- A standard 120 volt circuit at 20 amps can handle 2400 watts. 120 * 20 = 2400. A typical hair dryer uses about 600 watts for example
- Look (and test?) before touching, open door, look again (rust, burns, gaps, unsafe stance)
- Block client from touching equipment
- May be unsafe to remove upper cover of combination panels (service main at top)
- Sheet metal screw shorts, shocks, fires
- Swing-out covers can pinch wires
- 14 gauge – 15Amps
- 12 gauge – 20 Amps
- 10 gauge – 30 Amps
- 8 gauge – 40 Amps
Other notes regarding circuits and wiring..
- Exceptions to these wire sizes and fusing occur for special circumstances such as air conditioners whose motors produce a brief current surge during startup.
- Aluminum electrical branch circuit wiring size guide: for a circuit of the same amperage, an aluminum solid conductor branch circuit wire must be 1 size larger than copper. Currently (since the 1970’s) aluminum electrical wiring is used only in the form of multi-strand on single-use circuits like range /DHW/AC older solid conductor AL may be present in next gauge.
- Solid conductor aluminum branch circuit wiring is unsafe, a fire hazard, and requires repair – see The Aluminum Wiring Website
- Federal Pacific Electric Stab-Lok breaker panels – see FEDERAL PACIFIC FPE HAZARDS
- Zinsco electric panels – see ZINSCO / SYLVANIA HAZARDS
- Bryant electric panels
- Challenger replacement breakers/panels
- Mains: Not in: bathroom, clothes closet, kitchen cabinets, stairwells (same as service disconnect)
- Should be at eye level, easily accessible, 3 ft. clearance
- Subs: may be located almost anywhere (still some Sub panels are improper as above).
- Finding hidden sub panels: Look for feeder-breaker/fuse or wires leaving main
- Fuses more reliable to “blow” – not mechanical BUT easier to over-fuse (reduce with S-type retro)
- Breakers more convenient to reset can be tested without having to then replace the safety device – less likely to be over-fused (but over fusing still happens – compare wire gauge to breaker ampacity)
- Obsolete and/or fused neutrals
- Damaged panel/components
- Loose panel
- Inappropriate support material
- Unprotected panel openings/knockouts
- Undersized panel – physical size/crowded
- Overheating – look at mains, breakers, bus, neutrals, wires
- Rust or water – look for rust, corrosion, overheating, subtle spots, suspect hidden damage to bus or breakers, look for water trace marks on entering SEC
- circuits not labeled
- panel overcrowded
- poor access to panel
- panel upside down or switches “on” in down position (obsolete)
- Panel used-with and not suitable for AL wiring
The source for most of this information was found here http://www.inspectapedia.com/electric/ElecPanelInsp.htm
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Comments 20
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Scott,
$1500-$1800 should be the installed price. The purchase price for the hardware can be $500-$800 depending on the quality breakers you use.
Two other items to note are ground protection. Many older homes have no ground. This can be remedied by grounding each room or using a mechanical ground at the breaker. The mechanical ground is a good way to go. It is much cheaper.
Also, any home with an addition or finished basement may have two different metals (copper and aluminum) If improperly spliced together they can have cathodic corrosion. That corrosion can lead to separation at the joint. This will result in arcing and can cause a fire. This was the other half to the problem that nearly burnt my house down. This problem is more then just old wiring attached to new wiring, it can also be at each and every outlet. If someone installed copper outlets onto aluminum wire, the problem is the same.
Luckily, it can be rather inexpensive to fix. Just don’t let an electrician fool you into thinking that the metals must be heat welded together.(extremely expensive) A simple electrical join gel can be used.
Just some extra food for thought. Scott, your posts are very valuable for those looking to understand the unknowns. Looking forward to more.
Awesome info Jason, thanks for chiming in. What is the easiest way to check for a proper grounded electrical box?
You can buy a tester at the hardware store. You simply plug it in, the light will indicate if it has a ground or not.(if there is already a faulty wire, the tester will pick that up as well) I have no idea the cost.
I am definitely one of those people who refuses when it comes to electrical work. It is also true that the reason behind this is because I know little in this kind of field. I’m very thankful that I had run into your article.
You face problems when you dont to solve your problems by own. so always read the manual whatever and whenever you are going to buy. keeping care of preventive maintenance saves you from major and also from ineffective repair man.
I like what you mentioned, the things that we are afraid to repair are the things that we don’t understand. Its also hard for me to trust myself even when I feel like I know what I am doing. Your post has been really informational. Thanks for sharing.
I like what you said about fear and lack of education. The main reason we fear things is because we don’t understand them. It will be really helpful to have less fear regarding electrical work. Thanks for sharing.
An electrician should have liability insurance so they are covered if they or anyone else is hurt during or as a result of their work, or if property or fittings are damaged.
Thanks for tell me the cost of the replacement of the panel. I thought it was going to be more. The labor might make it more but it is a very important piece.
Its so different from England, a new consumer unit for a standard home would be £400-£600 which is a lot cheaper than in the states which I can not understand what the big difference is? I know the sparks on the other side of the pond need electrician certificates to be able to do installations but it seems we are being hard done by in England
Electrical contractors are people who perform an array of specialized services. These services are designed to make your home safe as well as your family members. Services such as hard-wring, running of electrical conduits, and the installation of junction boxes are just some of the things in which they do.
Watch those seemingly small details. Be sure the permits are in the contractor’s name, not yours. Otherwise, you’ll be obligated to make sure work is up to standard and required inspections are done
Doing the research is always important, that’s a good strategy. Also, knowing what to look for can help ensure you make the right repair decision when needed, just as you shared.
This was a really good breakdown of what to expect and how to prepare for replacement of an electrical panel. I love reading about more technical repair projects like this. Thanks for putting this together.
Great
I appreciate your article
An electrician should have liability insurance so they are covered if they or anyone else is hurt during or as a result of their work, or if property or fittings are damaged.
Watch those seemingly small details. Be sure the permits are in the contractor’s name, not yours. Otherwise, you’ll be obligated to make sure work is up to standard and required inspections are done
The repairs can vary so much because of the work needed to be done. There are lots of things to consider and the type of contractor to hire to do the work.