Turns out its for protecting metal (e.g., pipelines) from corrosion by running electrical current through it. (http://en.wikipedia.org/wiki/Cathodic_protection).
And now I know. Except for now wondering what sort of metal structure is being protected.


Oh yeah … I knew exactly what thingums was … Use mine all the time … Yup …
Now you know where to go the next time somebody needs CPR.
What sort of metal structure is being protected? I found a hint at the company website http://www.irtrectifier.com/index.php?option=com_content&view=article&id=47&Itemid=53
"IRT provides products for a multitude of cathodic protection applications whether it services the Oil and Gas, Municipal – Water works, Gas Utility Distribution, Infrastructure, Refining, or the Marine Markets. Our products can be used in on-shore and off-shore applications as well."
I wonder if this could have helped us and our recent experience at UCLA – although it's probably too early to know if the water main break was due to corrosion, or to something more sudden.
Ships have them too. Any big ships parked nearby?
I'll have to check out the other boxes around it. It's in a residential neighborhood, so I suppose it could be anything from a water main to a gas main.
I use an interociter for that.
Oscillation Overthrusters can also be useful.
+Alan Olsen Whoa! I never expected to hear anybody mention an interociter! Have you read the short story or just seen the movie?