Tin-foil Hats and Your Home’s Electrical Grounding System

Like most of my readers, I have been known to occasionally don a tin-foil hat when necessary.  I have avoided stepping on cracks and certainly tilted at windmills when necessary.

Science usually makes us give up our wishful thinking (the desire for the simplicity of tin foil) and helps us pick and choose actually conquerable windmills–or at least understand the consequences.

There will always be causes worth doing battle with as long as there are idiots to create those causes.

Often it is seemingly impossible to tell the difference. And, isn’t that what keeps us all entertained all the days of our lives?

But back to aluminum foil hats, and protecting ourselves from the unknown or seeking information from the ether. Once upon a time in a crawl space (where I have most of my epiphanies and meaningful conversations with the unknowable and the unseen), I came across an instance of where someone was clearly attempting to communicate with the void—or perhaps merely attempting to “avoid” something.

Metal piping in one’s home must be bonded and/or grounded to the house electrical grounding system. We can clearly see in the following picture that it was once connected, but now it looks more like something you might use in a search for E.T.

In this particular case this “avoidance” resulted in the house not being grounded at all at the home itself, because there were no ground rods or other means of grounding the electrical system. When this occurs grounding is achieved by the wire that runs back to the utility company transformer at the street. This condition makes it very difficult to keep static charges from building up on the house’s electrical system. 

If the ground wire at the utility pole is lost it can become even more difficult and can result in considerable damage to electronic equipment in the home.

It is now time to communicate with the electrician about repairs–they rarely tilt at windmills and I have never seen one wear a tin-foil hat!

By Charles Buell, Real Estate Inspections in Seattle

If you enjoyed this post, and would like to get notices of new posts to my blog, please subscribe via email in the little box to the right. I promise NO spamming of your email! 🙂

Being well grounded is not just about one’s well being–but it could be.

There was a time, in the not so distant past, when the only way a house’s electrical system was “grounded” was by connecting the grounding conductor to the metal water pipe coming to the house. There are still a large number of such houses around the country.

While I could talk about where this wire gets connected in relation to where it is supposed to be connected, that could be another whole blog post all by itself.

Today I want to talk about how this particular means of grounding the electrical system, often gets compromised by the installation of plastic components. It is also about how plumbers are not electricians and electricians are not plumbers, so these compromises happen too often. The lowly home inspector is about the only one that is going to draw attention to the problem.

One of the most common ways these older systems get compromised is when the old galvanized pipe from the street is no longer functional (from a plumbing stand point) and gets replaced with a new plastic water line. The installation eliminates the house electrical systems grounding electrode, resulting in the loss of a proper path to ground for dissipation of static charges that might build up on metallic systems  in the home.

The ground path is not totally eliminated however. There is also a grounding path back to the ground rod at the utility transformer on the pole at the street–which could be several houses away.

For electrical safety it is important to maintain grounding redundancy.

There could also be ground rods present in addition to the water pipe grounding electrode.

Another way these systems get compromised is when the pipe is repaired with plastic components—resulting in a break in continuity of the grounding conductor.

In the following pictures we can see where the old water line has been abandoned.

Water Pipe Grounding

And while the new water line from the street is metal, plastic components have been used to connect the new pipe coming to the home to the water pipes inside the home. The grounding conductor attached to the pipe on the house side of the plastic pipe is effectively no longer connected to the incoming water line–to either of the metal pipes.  Both would still likely be required to be used as grounding electrodes for the home’s electrical system.

Repairs will not be difficult, but needs to be done to provide proper grounding of the electrical system.

By Charles Buell, Real Estate Inspections in Seattle

If you enjoyed this post, and would like to get notices of new posts to my blog, please subscribe via email in the little box to the right. I promise NO spamming of your email! 🙂

Sorry Utility Linesworker—I didn’t mean to forget…….

The receptacle pictured below is a standard dryer receptacle. 

It is installed next to the stacking washer dryer and was likely used for the dryer, previous to the dryer being converted to gas.  What is a handy sort of guy to do with a left over dryer receptacle?  Well why not plug the generator into it and use it as a way to get power to the electrical panel?  GENIUS!

While it has been labeled as to what it is for–with even a warning to make sure the main breakers are turned off, this is not an approved means of providing power to the electrical service panel.  Modern generator interfaces are just that: “an interface.”  An interface will mean that there is a way of ensuring that home generated power cannot improperly back-feed the lines running to the home.

This is an extremely important safety feature because, every year utility company lines workers are killed or injured from improperly installed generators that send power back into the grid.  Obviously if you shut off the mains, as the instructions say–everything will likely be OK.  But all you have to do (when in the heat of the moment all you can think about is the venison thawing in the freezer or getting your crashed computers back up and running) is forget to turn the Main breaker off just once and someone is killed–how will you rationalize not installing a proper interface?

These interfaces are extremely cheap–especially the type that is basically a switch that turns the generator breaker to the on position in the same movement that turns the main breaker off.  Here is a picture of what these simple interfaces looks like.

When you flip the main breaker to the left you can then slide the mechanism upward allowing you to turn the top right generator breaker to the on position.  There are even panels that can perform this operation automatically.  Here is a picture of a Square-D Panel that can sense a power loss, turn off the main breaker and turn the generator on–all before the lights much more than dim.  At least that is the theory.

These panels however, are not cheap–but for someone that wants all the bells and whistles or has to maintain life support systems and computer systems–it may be warranted.

So let’s generate safety–and let’s do it safely!

By Charles Buell, Real Estate Inspections in Seattle

If you enjoyed this post, and would like to get notices of new posts to my blog, please subscribe via email in the little box to the right. I promise NO spamming of your email! 🙂