Reuben's Home Inspection Blog

My New Invention – A Better Two-Prong Outlet Tester

August 3rd, 2010 | 2 comments

Warning:  Do not try this at home, at work, or anywhere else.  You could get electrocuted.

They say necessity is the mother of invention, and I guess they’re right.  I inspect a lot of old houses in Minneapolis and Saint Paul that still have two prong outlets, and testing these outlets has always been much more time consuming than testing three prong outlets.  I started thinking about this the other day, and ended up inventing a silly looking electrical tester that will save me a couple seconds at every two-prong outlet I test.

Until my invention, testing a two-prong outlet required two hands and multiple steps with a standard two-lead tester.  Here’s how it went:

Stick one lead in each slot – if the tester lights up, the outlet is energized.

Two-Lead Tester

To test the polarity of the outlet, I stick one lead in the smaller slot and grab the other lead.  I’m not kidding.  If the polarity is correct, I’ll at least see a very small light at the tester.  If my body is in contact with a grounded surface, the light will actually light up quite brightly.  If the polarity is reversed, the light won’t light up.

Two-Lead Tester Checking Polarity

At this point, you’re probably thinking that the second part of this process is a stupid test because I could get shocked.  Technically, yes, I’m getting shocked, but there is so much resistance in my tester that I can’t even feel it.  If I’m standing on a concrete floor with wet feet and I try this test, I can feel a very slight tingle.  That’s about as bad as it gets… but I’m sure this would also make someone from Underwriters Laboratory laugh maniacally if I tried to get my little invention listed.

I’ve invented a tool that rolls these steps in to one, and only requires one hand. I took a standard three prong tester and cut the grounding pin almost all the way off.  I attached a stranded copper wire to this pin, and then wrapped my electrical tester with foil tape.  That’s it, that’s all.

Modified Tester Modified Tester Covered with tape

When I plug this tester in to a two-prong outlet, the middle light will light up if the outlet is energized.

Power at outlet

If the light on the right dimly lights up while I’m touching the metal tape on the tester, I know the polarity is correct.

Proper polarity at outlet

If the light on the left lights up, the outlet has reversed polarity.  That’s it, that’s all.  If I want to know if the outlet box is grounded, all I need to do is touch the box with skin while holding the tester; if the outlet is grounded, the dimly-lit light will get really bright.

Grounded Metal Box

How cool is that?

RELATED POSTS:

Reuben Saltzman, Structure Tech Home Inspections - EmailSaint Paul Home Inspections

Facebook Reuben's LinkedIn Page Follow StructureTech on Twitter ASHI Certified Home Inspector - Click To Verify Click to subscibe to Reuben's Blog

Inspections vs. Appraisals

January 17th, 2009 | 3 comments

When I tell people what I do for a living, a common response I get is “So you’re, like, an appraiser, right?”

No.  I’m not.

While home inspectors and appraisers both look at houses, must be independent, objective, and impartial, our jobs are quite different.

The primary purpose of a home inspection is to educate the buyer about their new home, so they can make an informed decision on the purchase.  The primary purpose of an appraisal is to protect the lender’s assets; this is done by determining the value of a home.  The value of a home will be highly dependant upon what other properties in the area are worth, and whether the subject home is in overall better or worse condition than the comparison homes (referred to as ‘comps’) .

A home inspector’s client is the buyer, whereas the appraiser’s client is the lender.  A home buyer is responsible for finding an excellent home inspector, who has only the client’s interests in mind.  The home inspector gets paid whether the home is sold or not.  As a side note, a home inspector should never allow their inspection fee to get rolled in to the closing costs; this means that the home inspector now has a financial interest in the home being sold to the buyer!  As for appraisals, the bank will typically decide who does the appraisal, and the buyer has very little to do with it.

Home inspections are almost always performed with the buyer.  Some home inspectors (such as myself) want the buyer to attend the entire inspection, while others ask the client to show up at the end.  For appraisals, it’s a little more mysterious.  The buyer doesn’t attend the appraisal, they may not be told when the appraisal will happen, and they aren’t given a copy of the appraisal – not to say they can’t get a copy, but remember, the lender is the client; not the buyer.

The bulk of the work for a home inspection is performed at the subject home, while an appraiser will spend a relatively small portion of their time at the property.  A home inspector spends several hours at a home doing the inspection, and must also generate a report, which may be produced on site, or might be produced later from their home or office (or even a restaurant…).  An appraiser’s work consists of much more research about all the other properties in the area, and the report must include detailed information about other comps.  On average, the on-site portion of an appraisal can be done within 30 minutes.

In short, a home inspector determines the condition of the home, whereas an appraiser develops an opinion of value for a home.

RELATED POST:  FHA Loans Require Appraisals, Not Inspections

Reuben Saltzman, Structure Tech Home Inspections – Email Home Inspector in Saint Paul