Friday, October 07, 2005

Safety Award 3

Today's award goes to this guy, who is standing properly on his ladder. Unfortunatly this is the wrong ladder in the wrong place.

Water+Aluminum ladder+ electric drill



At 10:04 PM, Anonymous Anonymous said...

Hmm... did I miss something in Chem class in High School, or is aluminum non-conductive as it's used in consumer goods like cans and ladders?

I guess I shouldn't be saying anything - you make this stuff, you would know, but I could've sworn... -Bo

At 10:00 PM, Blogger Mr. Engineering Johnson said...

Resistance may vary according to the alloy type, but it's still conductive. In fact Aluminum wiring has been banned for most residential construction because it has a strange characteristing that causes resistance to go down as the temperature goes up. That has supposedly led to fires under certain circumstances.


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