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Hello Fellow Model Railroaders,

This is just a reminder of ESD. I figure most folks in this hobby are familiar, but if not here's some info.

I think everybody has experienced static discharge, like the time you dragged your feet across the carpet and touched a door knob - Snap - Ouch! Yeah, just think what that would do to the electronics in your model locomotive or other high tech stuff with sensitive electronics. If you can feel the static shock it's probably 5,000 plus volts, anything below that are typically are not felt. Static voltages as low as 500 volts will fry a ESD sensitive component and you won't feel that.

Here's some recommendations to avoid the term, "Static Zap Makes Scrap"!

1) When working on your electronics don't wear man made fabrics like polyester! It's best to wear cotton.

2) Know this: Air conditioning reduces humidity which increases static build up just waiting for somewhere to discharge.

3) Ground yourself before touching any electronics.

4) Better yet, use a ESD portable static mat kit to work on your sensitive locomotives and other electronics. There are bunch's of ESD portable kits available online. Below is my ESD Kit. I use a perfectly sized Philips screw driver shoved into the a wall outlet ground and then clip the ESD Kit ground to it.

Sounds like a lot of work to protect against something that may, or may not happen?! Not after you have fried a R2LC/R4LC, Sound Board, or power board in your Lionel Vision Line locomotive like an friend of mine that did not heed my warnings! :-(

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I've installed twenty-plus decoders in my engines, mostly on a kitchen countertop near a microwave oven and other household appliances and never fried a decoder.

Seriously, sticking a screwdriver into a wall outlet? Why not a kitchen knife?

It's like those same warnings at a gas pump about the danger of a static electric discharge whilst filling up. Nobody ever reads them or pays attention. I can't remember the last I heard of a fire at a gas station as a result.

@catnap posted:

I've installed twenty-plus decoders in my engines, mostly on a kitchen countertop near a microwave oven and other household appliances and never fried a decoder.

Seriously, sticking a screwdriver into a wall outlet? Why not a kitchen knife?

It's like those same warnings at a gas pump about the danger of a static electric discharge whilst filling up. Nobody ever reads them or pays attention. I can't remember the last I heard of a fire at a gas station as a result.

Well then, I didn't post this for you, keep doing what your doing, good luck.

@catnap posted:


It's like those same warnings at a gas pump about the danger of a static electric discharge whilst filling up. Nobody ever reads them or pays attention. I can't remember the last I heard of a fire at a gas station as a result.

C.N.,

With that line of thought in mind why don't we just declare all safety warnings to be outright lies.  Let's see how far that takes us.

Many times safety precautions are targeted at low-probability-but-high-risk outcomes.  Yes, you've never seen a spark start a fire in a gas station, but if you had the outcome would be quite catastrophic.

A static spark when working on a model locomotive is not high risk, except maybe to one's pocketbook.  One that destroys a gas station in a flash could easily be much more expensive, in terms of money and lives.

I'll stick with safety.

Mike

Truthfully, the ground of the ground strap should be connected to the common of the equipment being serviced.  In the case of model train electronics, typically that would be the chassis of the unit in question.  You're trying to minimize the potential between the frame and the electronics, not the power-line ground.

Hi John, I agree completely with your statement, and connecting what ever you're working to the ESD mat or wrist strap will work maintaining a constant common. I come from a high tech electronic manufacturing support background and all ESD in the manufacturing area were/are connected to earth ground keeping the potential for static at bay at all times. So, when I can I use the earth ground in a household outlet. I suppose that could be an issue if somebody lives in a really old house that has outlets with no earth ground!!! Yikes! I was hoping folks in this forum know the household outlet layout, like which one is power, common and earth ground. Maybe I shouldn't assume that?!

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