What year did THHN 1st come out?
Here's why,
Last week excavators were digging for a foundation and found an abandoned steam station/ vault. Inside the mass was all the dead steam pipes and full of asbestos. While abating this week we notice some IMC that has some #4 THHN in it. The excavator unknowingly pulled and broke the pipe exposing the wires.
Steam hasn't been used at the site for 30 years.
I spent most of last week meeting with the city, power company and locators who all say it isn't theirs and was not supposed to be there.
I'm just trying to figure out the earliest time the wires could have been put in there.
I've been at the site for 16 years and never knew it was there...
Here's why,
Last week excavators were digging for a foundation and found an abandoned steam station/ vault. Inside the mass was all the dead steam pipes and full of asbestos. While abating this week we notice some IMC that has some #4 THHN in it. The excavator unknowingly pulled and broke the pipe exposing the wires.
Steam hasn't been used at the site for 30 years.
I spent most of last week meeting with the city, power company and locators who all say it isn't theirs and was not supposed to be there.
I'm just trying to figure out the earliest time the wires could have been put in there.
I've been at the site for 16 years and never knew it was there...