Quote:
Originally Posted by Tancredi
I don't understand why there are so many flying electrical cables in a stormy city like St. John's. Could it be because burying the electric cables could cause the frozen ground to break them? But are windstorms no longer dangerous? I ask myself the same question for traffic lights; in St. John's the traffic lights are all attached to cables and during storms they swing dangerously.
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SHH answered you pretty well but I'll add on a bit.
Our soil is pretty shallow here, so to get to a depth appropriate for underground power lines would cost quite a bit. It's pretty tough to dig under 8 inches here. Heck, it's tough to dig period. The soil is pretty rocky, and not too far down you're close to bedrock. There are some neighborhoods in the city which bury power and service lines, but they're the exception, not the rule. The city would look a lot nicer if those lines were underground, trust me.
As for the traffic lights: it's so windy here, that free-hanging lights are more secure than lights that are fixed to their poles. Fixed lights will snap off during really bad wind storms, whereas lights on a chain are less likely to break. The far left light in SHH's picture is clearly broken, they don't hang that free, the one on the right is more typical. It's very similar to the best thing to do with tower cranes during hurricanes: let them swing free in the wind. If you have them fixed in place they become a major safety hazard.