ESD Flooring: Static Dissipative vs. Static Conductive


Hi, I’m Dave Long from Staticworx and today we’re going to talk about my favorite
topic: static dissipative versus conductive. Probably the biggest question we’re asked
by any client for the first time when they call is “Which material should I use? Should I use static-
dissipative flooring or should I use conductive flooring?” The short answer is neither. You should be quantifying what you’re buying. You shouldn’t be buying
based on a description. Let’s go through it, that way you’ll have the same understanding that I do. What I’ve done here is I’ve drawn a simple
line chart starting at 0 going up to a billion and what I’m going to be
plotting here, we call ohms. Ohms is the unit of measurement that we use
to determine how conductive a material is. Ohms is a property that allows us to predict how rapidly
we can eliminate static going through one of our floors. So what I’m actually telling you is that if a floor
has zero ohms it’s very, very, very conductive. Like a puddle of water, stainless steel, copper. If a floor has a billion ohms, it’s like
the carpet in your living room. A billion ohms is so many ohms
that anything over that amount the floor is not going to have the
ability to eliminate static at all. So what we need to do
is find the sweet spot. That place where the
conductivity is just right, that allows the floor to prevent static,
ground static, and keep you safe, so that you’re not grounded so close to the
earth that if you touch an electrical circuit you’re going to get a shock. One of the problems with
reading specification sheets, is inconsistencies in how
they quantify materials. What you’ll see sometimes on a spec
sheet, is an ohms rating of 10E4 to 10E6. People call me all the time and
say “what does that mean?” If you go back and look at your
mathematics from high school, you’ll remember that 10,000
is the same thing as 10E4 place. Four decimals away from 0. 10E5 is 100,000, 10E6 there’s a million. So when you see these numbers you
can either look at them as exponents or you can look at them as as actual values So let’s take a look at
how we can plot this out. Right now, if you look up a
definition for static dissipative, that definition will tell you that any
material from a million ohms to a billion ohms is called
static dissipative. If you look up the definition of conductive
flooring, you’ll determine that any floor that has a resistance of a
million ohms or less– and by the way they don’t
specify the low number– anything from a million ohms
or less is static conductive. Well, right now we’ve
got two choices: something that goes all
the way down to zero and something that goes
all the way up to a point where it’s so not conductive that
it won’t get rid of static electricity. So how do we know
which material to use? Well fortunately, we
have other standards. One of the standards we
have is called ANSI 20.20. This is when you should write down
because any time you write a spec, that’s what you want to look at. ANSI 20.20 says that the floor and the person together
should have a resistance of less than 35 million ohms. Well 35 million ohms is somewhere in between
10 million and 100 million so let’s call it right here and let’s use the green marker and we’ll say that that’s the highest
point of resistance we can have. The NFPA and OSHA say that the floor has to have
always more resistance than 25,000 ohms. Well here’s 10,000, here’s 100,
so here’s 25 thousand. So in between here and here, we have
the lowest margin where you’re still safe. We have the highest margin where
the floor will meet this ANSI 20.20. So we’ve essentially eliminated a big
portion of the static-dissipative range. We’ve eliminated a big portion of the
conductive range. If you notice, we’re in between the two. We’re saying that some of static dissipative is
adequate and some of conductive is adequate. So that’s why when somebody asks
me which material should I get, static dissipative or conductive, my
answer is don’t use either term. Specify exactly what the
properties of the floor should be and those properties should be more than
25,000 ohms and less than 35 million ohms. I have one thing to add. Statistically speaking. would you really want
something that’s right at the edge of safety? Most people will tell you
they don’t want that because what if someother conditions
allow the floor to be a little more conductive? Maybe it gets wet. Maybe the installation circumstances are
such that it drops the conductivity down because of some pre-existing condition. So what we look at is a little
bit of margin of error. We like to use a hundred thousand
ohms as our minimum resistance. So when we talk about a floor that’s
going to be safe but still work, what we’re talking about is a floor that will measure
between 100,000 ohms and 35 million ohms. What I would suggest is if you want
to know more, go to our website go to the Knowledge
and Safety Center and read some of the articles
on floor testing, read some of the articles on the
proper conductivity for grounding. Don’t just end it here. This is just the beginning. And of course you have the ability
to pick up the phone any time you want and call me
at 1-888-staticworx.

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9 thoughts on “ESD Flooring: Static Dissipative vs. Static Conductive”

  1. k1awdttt says:

    Very informative! I was asking that stupid question too… 6 mins later I'm better educated. Thanks so much WORX!

  2. Raj Bapna says:

    Thanks for the great video.

    I have a question for personal use (grounding) and not industrial use.

    I want to benefit from "Earthing" when I sleep, so what OHM range do you suggest for the mat that I can use on my bed and connect to ground? Can I buy bed-sheet (clothing) rather than mat for this purpose?

  3. vvkvsw says:

    Thank you. It was extremely helpful

  4. TheResidentEngineer says:

    You must be referring to some of the homeopathic methods for reducing EMF…which are somewhat questionable. Before you start grounding yourself while you are sleeping, you may want to perform a risk assessment for your sleeping environment. Things like the likelihood of nearby lightning strikes, high-tension line proximity, ground field for your home or other nearby structures, etc. should be taken under consideration. You may actually end up doing more harm than good.

  5. TheResidentEngineer says:

    Good…how about throwing in the more common terms like Kilo Ohms, and Meg Ohms? Nice job using all standards as a method.

  6. motocristo says:

    I have been given the task to strip, apply and maintain ESD wax for very large factory. Aside from 1:1 buffing, can the wax be burnished to provide extended longevity?

  7. Mark Darius says:

    What you forgot to mention is to meet s20.20 the resistance between a person IN HEEL GROUNDERS with the flooring must be below 35 meg ohms. Heel straps ALWAYS have built in 1 meg resistors SO even if the floor is 1.0e04 the total resistance between the tech, their heel straps and the floor will be one meg ohm. Considered the SAFE range for fifty years. What happens if the floor is static dissipative and it gets dirty? You FAIL ANDI ESD S20.20. Millions of people go to work on a static conductive floor daily, out of those million people ZERO will be electrocuted because of the floor. A static conductive floor offers ultimate static control. Very misleading video

  8. Bob Bigglebar says:

    I'm sorry could you speak up I can't hear you over your shirt

  9. Nitesh Sharma says:

    IS ESD slippers are conductive? or please tell me what is the use of the ESD slippers.

    Plz tell me how ESD slippers work?

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